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• pxe boot dos 7.x / 8.x on modern mainboard without floppy controller

  - by GitaarLAB

  How to pxe boot MS DOS 7.x / 8.x on a modern pc (mainboard without floppy controller) without using an external usb floppy drive? MS DOS 6.22 and earlier or other flavors pxe boot just fine on floppy-less hardware. But DOS 7.x and 8.x renders an error on boot: "Type the name of the Command Interpreter (e.g., C:\WINDOWS\COMMAND.COM) I read somewhere during research this was a rather unknown error, that started to become more common due to the advent of floppy-controller-less hardware. On some hardware (bios dependent) one could plug a usb-floppy-drive in the computer before booting (but that MIGHT also require it to be a "golden floppy drive" (as they where called back then). From a russian site (I read about a year ago and cannot find the hyperlink) MS-Dos versions 6.22 did some-kind of floppy-drive reset during initialization and since it couldn't connect to the floppy-host thus the error. How can I resolve this (without a physical external usb floppy)? Might there be some kind of virtual floppy-driver that could resolve this (for example to be loaded before the dos image loads)? Or could someone point me into the right direction (maybe even a hex-address and some further explanation or something)? I'm using syslinux by the way.

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• What applications do people use for windows folder management? How do you switch between folders in

  - by 118184489189799176898

  I'm always switching between client's folders in different applications like photoshop, sql manager, explorer etc. It's so slow to go between them, navigate to the folder and it's still too slow to copy and paste the directory etc. It's so annoying to do. Someone must have a good solution. I was thinking if there was a "recently accessed" folders list available within every folder explorer window... so in any application, if i go "file open" it will have something, somewhere that lists the recently accessed folders - that would be really helpful. I am aware of the recent places folder in win7, but this sucks because it is not sorted by date accessed. Perhaps if there was a way to change this then this would become a decent feature? Is there some application that already does this? i'm sure someone has already solved this issue in a more elegant solution than I can think off. I'm keen to know what programs people use or how people addresss this issue? Thanks...

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• I can play "test" sounds, but no other audio works

  - by Callum

  I'm running Windows XP, and last night my PC was infected by a frustrating virus (one of those viruses that won't let you open virus checkers, etc). I finally killed it 2 hours later, but it involved some heavy duty anti-dote. One side effect is my audio is now gone. Except it's not entirely gone, because when I open the Realtek HD Audio Manager in the task bar, I can play all the "test" sounds. The speakers, the sound card, etc, are therefore working fine. But things like YouTube or Windows Media Player, there's no sound. I'm guessing there's a setting that needs to be reconfigured somewhere.. but where? Maybe relevant: One thing I did do last night was "play" with the system registry. Any help would be greatly appreciated. Thanks. SOLVED! The two hour battle with my computer virus resulted in my computer permanently thinking it was in Safe Mode, regardless of how it booted up. I was able to "fix" this by following the post by hsandler in this thread: http://www.petri.co.il/forums/showthread.php?t=23032&page=2 I then rebooted.. and let me tell you, the Windows Startup music has never sounded so sweet. Thanks to all, especially James, whose advice gave me a major clue as to what the problem was.

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• Malware Defense Shows Up in PlayOn Settings/Logs Although System Has Been Thoroughly Cleaned

  - by nicorellius

  I was hit really hard by some nasty malware: Malware Defense. I was doing something I should not have been doing when I got it (surfing Pirate Bay for TV shows). It locked up my system and I had to reboot in safe mode. I was able to shut down the process and remove it using a malware killer tool. I then installed, after my machine was cleaned up a bit, Clamwin, Malwarebytes, and another AV tool. I cleaned the heck out of my system. Simultaneously, while this was going on, I was having trouble with my media-server, PlayOn. This tool is great, but has some bugs. One in particular is that it will not function well with AV software running. I found a way to allow the new AV software to run while using PlayOn, but it still says I have Malware Defense on. Firstly, Malware Defense is long gone. I cleaned all remnants from my registry and scoured my system with the above tools multiple times. PlayOn is getting some information that I have this crap installed on my system, but it's not. The system runs OK, but not optimally. I have a feeling it is causing my streaming to be interrupted sometimes. How is it that I can't even find Malware Defense on my system if I tried but yet somehow PlayOn is getting a finger print of it somewhere? I have gone back and forth with MediaMall to no avail. I kind of just gave up, because the streaming works OK. BTW, I also uninstalled/reinstalled PlayOn several times, reverted back to previous versions, etc. The only thing I haven't done is reformat my disk and reinstall Windows. I really don't want to do this if there is another way to remove this little print. Any ideas?

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• Possible DNS Injection and/or SSL hijack?

  - by Anthony

  So if I go to my site without indicating the protocol, I'm taken to: http://example.org/test.php But if I go directly to: https://example.org/test.php I get a 404 back. If I go to just: https://example.org I get a totally different site (a page about martial arts). I went to the site via https not very long ago (maybe a week?) and it was fine. This is a shared server, as I understand it, and I do not have shell access, so I'm limited to the site's CPanel to do any further investigations. But when I go to: example.org:2083 I'm taken to https://example.org:2083, which, if someone has taken over the SSL port, could mean they have taken over the 2083 part as well (at least in my paranoid mind). I'm made more nervous by the fact that the cpanel login page at the above address looks very new (better, really) compared to the last time I went to it over the weekend. It's possible that wires got crossed somewhere after a system update, but I don't want to put in my name username and password in case it's a phishing attempt. Is there any way to know for sure without shell access to know for sure if someone has taken over? If I look up the IP address for the host name, the IP address matches what I have on a phpinfo page I can get to over http. If I go to the IP address directly on port 2083, I get the same login mentioned above (new and and suspiciously nice). But the SSL cert shows as good when I go this route. So if that's the case (I know the IP is right, the cert checks out, and there isn't any DNS involved), is that enough to feel safe at that point of entry? Finally, if I can safely log in via the IP, does anyone have any advice on where to check first on CPanel for why the SSL port is forwarding to a site on karate? Thanks.

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• nginx: how do I add new site/server_name in nginx?

  - by Neo

  I'm just starting to explore Nginx on my Ubuntu 10.04. I installed Nginx and I'm able to get the "Welcome to Nginx" page on localhost. However I'm not able to add a new server_name, even when I make the changes in site-available/default file. Tried reloading/restarting Nginx, but nothing works. One interesting observation. "http://mycomputername" in browser works. So somehow there is a command like 'server_name $hostname' somewhere over-riding my rule. File: sites-available/mine.enpass server { listen 80; server_name mine.enpass ; access_log /var/log/nginx/localhost.access.log; location / { root /var/www/nginx-default; index index.html index.htm; } } File: nginx.confg user www-data; worker_processes 1; error_log /var/log/nginx/error.log; pid /var/run/nginx.pid; events { worker_connections 1024; # multi_accept on; } http { include /etc/nginx/mime.types; access_log /var/log/nginx/access.log; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; tcp_nodelay on; gzip on; gzip_comp_level 2; gzip_proxied any; gzip_types text/plain text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript; gzip_disable "MSIE [1-6]\.(?!.*SV1)"; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; }

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• Using Toshiba 22EL833 as PC display with GTX8800

  - by Oleg V. Volkov

  I had another Toshiba TV - 19SL738 - connected to this same PC and video card (GTX 8800) through DVI<-HDMI (DVI on PC side, HDMI on TV) before, that was working perfectly at it's native resolution 1360x768. Some time ago I had to change to 22EL833 and immediately faced problem with Windows 7 control panel and NVIDIA control panel both reporting native resolution for new TV as 1080i, 1920x1280, despite TV documentation saying that it have same 1360x768 as previous one. Practical tests confirmed that true native resolution is indeed 1360x768, because plugging in through DVI<-VGA and setting custom resolution through NVIDIA panel shown clear colors and crisp image, while setting anything different with either DVI<-VGA or DVI<-HDMI produced horribly distorted or squished images, with almost unreadable slim lines (as in letters, for example). Now, my problem is that there's no drivers for this TV and I'm unable to get good image while connecting it through DVI<-HDMI directly. The best I've achieved is editing EDID/driver manually, to persuade system that native resolution should be 1360x768, and while image became mostly clear, colors turned to some strange washed out effect, with pools of pure yellow, cyan and magenta there and there filling place of other colors. Gradients also became noticeably stripped as well. Somehow it looks like dithering gone bad and makes me suspect that image is still down/upscaled several times internally somewhere along the line. How can I connect this TV to DVI output of my video card to get best possible clear image, correct colors and correct native resolution?

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• How to pass alias through sudo

  - by Tanktalus

  I have an alias that passes in some parameters to a tool that I use often. Sometimes I run as myself, sometimes under sudo. Unfortunately, of course, sudo doesn't recognise the alias. Does anyone have a hint on how to pass the alias through? In this case, I have a bunch of options for perl when I'm debugging: alias pd='perl -Ilib -I/home/myuser/lib -d' Sometimes, I have to debug my tools as root, so, instead of running: pd ./mytool --some params I need to run it under sudo. I've tried many ways: sudo eval $(alias pd)\; pd ./mytool --some params sudo $(alias pd)\; pd ./mytool --some params sudo bash -c "$(alias pd)\; pd ./mytool --some params" sudo bash -c "$(alias pd); pd ./mytool --some params" sudo bash -c eval\ "$(alias pd)\; pd ./mytool --some params" sudo bash -c eval\ "'$(alias pd)\; pd ./mytool --some params'" I was hoping for a nice, concise way to ensure that my current pd alias was fully used (in case I need to tweak it later), though some of my attempts weren't concise at all. My last resort is to put it into a shell script and put that somewhere that sudo will be able to find. But aliases are soooo handy sometimes, so it is a last resort.

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• Installing Apache MPM Worker on Centos 5.5

  - by mrmartinblue

  I have a CentOS 5.5. server and am trying to switch from MPM Prefork to MPM worker. I have the standard yum httpd packages installed currently and from my reading I did the following: Uncomment the httpd.worker line in the /etc/sysconfig/httpd file. I also made sure that the httpd.worker file exists in the /usr/sbin/ directory. I also made sure that httpd service is stopped before making the above change. Ensured PHP was disabled for Apache. I'm fine with this and will use FastCGI to handle PHP files once I get the MPM worker up and running. Restart the httpd service, everything starts fine. Do a # httpd -V The console tells me it's still using prefork. If I do a # vi /etc/init.d/httpd the httpd.worker line is still commented out. I've tried changed this as well to no difference. Any suggestions? Things to look at? My application requires the worker MPM so the only choice I can think of is to go with ubuntu or another flavor that has the dedicated apache2-mpm-worker package. Is there something similar in the yum repos somewhere? Thanks in advance!

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• How to check DVD integrity at max read speed of DVD writer

  - by ashishsony

  I need to check the integrity of burned DVDs so that I can be sure about my backed-up data. I use DL-DVDs to take the backup. Earlier I used VSO Inspector software for the same but the day I switched to DL-DVDs the VSO Inspector gives me errors upon checking. I think the errors are because the switching of layer writing involves some dummy data somewhere. Secondly, it's damned slow for checking. I believe if there is a utility that can read all files (not the disk surface) and report if some files are unreadable would do the job. But it should be quick! Nobody wants to sit for disk checking for 3-4 hours after a quick 30 min data burn! I am looking for such a utility on Windows or Linux. Even scripts (python, etc) will do. I just want to be assured that the data is safe. Can someone help me in this? Thanks.

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• Remote Socket Read In Multi-Threaded Application Returns Zero Bytes or EINTR (104)

  - by user39891

  Hi. Am a c-coder for a while now - neither a newbie nor an expert. Now, I have a certain daemoned application in C on a PPC Linux. I use PHP's socket_connect as a client to connect to this service locally. The server uses epoll for multiplexing connections via a Unix socket. A user submitted string is parsed for certain characters/words using strstr() and if found, spawns 4 joinable threads to different websites simultaneously. I use socket, connect, write and read, to interact with the said webservers via TCP on their port 80 in each thread. All connections and writes seems successful. Reads to the webserver sockets fail however, with either (A) all 3 threads seem to hang, and only one thread returns -1 and errno is set to 104. The responding thread takes like 10 minutes - an eternity long:-(. *I read somewhere that the 104 (is EINTR?), which in the network context suggests that ...'the connection was reset by peer'; or (B) 0 bytes from 3 threads, and only 1 of the 4 threads actually returns some data. Isn't the socket read/write thread-safe? I use thread-safe (and reentrant) libc functions such as strtok_r, gethostbyname_r, etc. *I doubt that the said webhosts are actually resetting the connection, because when I run a single-threaded standalone (everything else equal) all things works perfectly right, but of course in series not parallel. There's a second problem too (oops), I can't write back to the client who connect to my epoll-ed Unix socket. My daemon application will hang and hog CPU 100% for ever. Yet nothing is written to the clients end. Am sure the client (a very typical PHP socket application) hasn't closed the connection whenever this is happening - no error(s) detected either. Any ideas? I cannot figure-out whatever is wrong even with Valgrind, GDB or much logging. Kindly help where you can.

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• Exchange 2013 attachments too big?

  - by KPS

  I am having the toughest time sending large attachments, everywhere I have checked my file size limit for send/receive is 100mb but yet users are unable to receive files even at the size of 14mb. I'm using a spam filter (Appriver) and have worked with there support for a very long time, we see the following errors in logs 13:32:40.260 4 SMTP-000036([myserverIP]) rsp: 354 Start mail input; end with <CRLF>.<CRLF> 13:33:41.038 3 SMTP-000033([myserverIP]) write failed. Error Code=connection reset by peer 13:33:41.038 3 SMTP-000033([myserverIP]) [659500] failed to send. Error Code=connection reset by peer 13:33:41.038 4 SMTP([myserverIP]) [659500] batch reenqueued into tail Windows firewall is disabled on the exchange server, all other emails that are of smaller value come through just fine. Here is a print out of size limits: ConnectorType ConnectorName MaxReceiveMessageSize MaxSendMessageSize ------------- ------------- --------------------- ------------------ Send InternetSendConnector - 35 MB (36,700,160 bytes) Send Appriver-Smarthost - 35 MB (36,700,160 bytes) Receive Default EXCHSRVR 100 MB (104,857,600 bytes) - Receive Client Proxy EXCHSRVR 100 MB (104,857,600 bytes) - Receive Default Frontend EXCHSRVR 100 MB (104,857,600 bytes) - Receive Outbound Proxy Frontend EXCHSRVR 100 MB (104,857,600 bytes) - Receive Client Frontend EXCHSRVR 100 MB (104,857,600 bytes) - Receive ExchangeRelay 100 MB (104,857,600 bytes) - TransportConfig - 100 MB (104,857,600 bytes) 10 MB (10,485,760 bytes) ADSiteLink DEFAULTIPSITELINK Unlimited Unlimited There is a no anti-virus on the server either that could be interfering, I am out of ideas at this point :( EDIT 1 After running BPA, it gives and error: Exchange Organization: Check whether the incoming message(CN=MyDomain,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=WG,DC=local) size isn't set The maximum incoming message size isn't set in organization 'CN=MyDomain,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=WG,DC=local'. This can cause reliability problems. Here are the sizes as of now: [PS] C:\Temp>Get-TransportConfig | ft MaxSendSize, MaxReceiveSize MaxSendSize MaxReceiveSize ----------- -------------- Unlimited Unlimited [PS] C:\Temp>Get-ReceiveConnector | ft name, MaxMessageSize Name MaxMessageSize ---- -------------- Default EXCHSRVR 100 MB (104,857,600 bytes) Client Proxy EXCHSRVR 100 MB (104,857,600 bytes) Default Frontend EXCHSRVR 100 MB (104,857,600 bytes) Outbound Proxy Frontend EXCHSRVR 100 MB (104,857,600 bytes) Client Frontend EXCHSRVR 100 MB (104,857,600 bytes) ExchangeRelay 100 MB (104,857,600 bytes) Again, smaller emails come through just fine. Seems like there is a 10mb receive limit somewhere that I cannot find.

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• What is the best way to recover from a mysql replication fail?

  - by Itai Ganot

  Today, the replication between our master mysql db server and the two replication servers dropped. I have a procedure here which was written a long time ago and i'm not sure it's the fastest method to recover for this issue. I'd like to share with you the procedure and I'd appreciate if you could give your thoughts about it and maybe even tell me how it can be done quicker. At the master: RESET MASTER; FLUSH TABLES WITH READ LOCK; SHOW MASTER STATUS; And copy the values of the result of the last command somewhere. Wihtout closing the connection to the client (because it would release the read lock) issue the command to get a dump of the master: mysqldump mysq Now you can release the lock, even if the dump hasn't end. To do it perform the following command in the mysql client: UNLOCK TABLES; Now copy the dump file to the slave using scp or your preferred tool. At the slave: Open a connection to mysql and type: STOP SLAVE; Load master's data dump with this console command: mysql -uroot -p < mysqldump.sql Sync slave and master logs: RESET SLAVE; CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=98; Where the values of the above fields are the ones you copied before. Finally type START SLAVE; And to check that everything is working again, if you type SHOW SLAVE STATUS; you should see: Slave_IO_Running: Yes Slave_SQL_Running: Yes That's it! At the moment i'm in the stage of copying the db from the master to the other two replication servers and it takes more than 6 hours to that point, isn't it too slow? The servers are connected through a 1gb switch.

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• Build suggestion for mini itx server [on hold]

  - by Spyros

  I am looking to create a home server and since there does not seem to be a nice ready made one to purchase, i thought of building a mini itx one. I am not familiar with the best hardware/case to pick and therefore i thought i would ask for your experience. I will most probably install a simple linux distro, probably Debian and most probably without a desktop environment as well. Therefore, I am not looking for the best graphics card, though a decent one is preferred for sure. I would say that the most important thing is that the case/hardware play well with each other and the machine has decent specs ( i think something like 8gb RAM and 1TB hdd is most probably my most important things). I understand that this question can be closed as subjective, but it would be a great help for me if some of you guys who have been doing a similar build, can suggest something. I tried to find a stack exchange variant for the question, but it seems that this one more closely relates to the subject. But I will definitely understand it if people close it due to being subjective in nature. If you can maybe move it somewhere or so, please feel free to do so. Thank you for your time :)

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• Extremely high mysqld CPU usage with no active queries

  - by RadarNyan

  I have a VPS running Ubuntu 12.04 LTS with LEMP stack, followed the guide from Linode Library (since I'm using a Linode) to setup, and everything worked fine until now. I don't know what's wrong, but my CPU usage just goes up since a week ago. Today things getting really bad - I got 74% CPU usage so I went check and found that mysqld taking too much CPU usage (somewhere around 30% ~ 80%) So I did some Google Search, tried disable InnoDB, restart mysql, reset ntp / system clock (Isn't this bug supposed to happen more than a year ago?!) and reboot my VPS, nothing helped. Even with mysql processlist empty, I still get mysqld CPU usage very high. I don't know what I missed and have totally no idea, any advice would be appreciated. Thanks in advance. Update: I got these from running "strace mysqld" write(2, "InnoDB: Unable to lock ./ibdata1"..., 44) = 44 write(2, "InnoDB: Check that you do not al"..., 115) = 115 select(0, NULL, NULL, NULL, {1, 0}^[[A^[[A) = 0 (Timeout) fcntl64(3, F_SETLK64, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}, 0xbfa496f8) = -1 EAGAIN (Resource temporarily unavailable) hum... I did tried to disable InnoDB and it didn't fix this problem. Any idea? Update2: # ps -e | grep mysqld 13099 ? 00:00:20 mysqld then use "strace -p 13099", the following lines appears repeatedly: fcntl64(12, F_GETFL) = 0x2 (flags O_RDWR) fcntl64(12, F_SETFL, O_RDWR|O_NONBLOCK) = 0 accept(12, {sa_family=AF_FILE, NULL}, [2]) = 14 fcntl64(12, F_SETFL, O_RDWR) = 0 getsockname(14, {sa_family=AF_FILE, path="/var/run/mysqld/mysqld.sock"}, [30]) = 0 fcntl64(14, F_SETFL, O_RDONLY) = 0 fcntl64(14, F_GETFL) = 0x2 (flags O_RDWR) setsockopt(14, SOL_SOCKET, SO_RCVTIMEO, "\36\0\0\0\0\0\0\0", 8) = 0 setsockopt(14, SOL_SOCKET, SO_SNDTIMEO, "<\0\0\0\0\0\0\0", 8) = 0 fcntl64(14, F_SETFL, O_RDWR|O_NONBLOCK) = 0 setsockopt(14, SOL_IP, IP_TOS, [8], 4) = -1 EOPNOTSUPP (Operation not supported) futex(0xb786a584, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb786a580, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 futex(0xb7869998, FUTEX_WAKE_PRIVATE, 1) = 1 poll([{fd=10, events=POLLIN}, {fd=12, events=POLLIN}], 2, -1) = 1 ([{fd=12, revents=POLLIN}]) er... now I totally don't get it x_x help

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• How can one make vim change terminal colors?

  - by amn

  I am using command line vim running from an xterm (which runs sh). I have color in vim according to a color scheme I like. The problem is, as usual with 256-color terminals and truecolor color schemes, colors are wrong. Now, I know I can do a gazillion things to fix this, including installing gvim, but I like my terminal. In fact, using xrdb [-merge] .Xresource file, I now actually have xterm override the color values, and the theme now looks perfect. Since, I may be switching to another theme, I need some workflow to have vim actually do what xrdb does - to reset terminal color pallette. Because right now I have to reset color values with xrdb ... first, then launch another xterm to actually use these values, then launch vim from that newly opened xterm to have the exact colors. The way I understood it is that vim color scheme, just as any other terminal application, uses colors by referencing their ids, and X resources set the values themselves. I think I saw somewhere on Internet, that terminal control character sequences can reset actual color values, in fact, I am sure they can - I managed to set my terminal background color at runtime. How would I make vim execute these sequences to match values for the color scheme? And is there any reference to these control sequences, as part of any standard?

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• How do I fix a super slow MacBook?

  - by MakingScienceFictionFact

  I'm running a black MacBook 4.1. Intel Core 2 Duo @ 2.4 GHz, 2 GB RAM, 250 GB hard disk drive, bus speed is 800 MHz. It's about three years old in excellent shape externally. I treat this thing like a baby. It used to run awesome, but now it's super slow at everything. I get the spinning pizza of death constantly. It takes a long time to boot up or load any program, even Safari and iTunes. iPhoto is terribly slow. The Internet doesn't work properly and it reminds me of a buggy PC. I've formatted it and re-installed Mac OS X 10.6 (with all updates), and I've done the disk repairs process. As an iOS developer this is driving me crazy, but luckily I have an iMac to work on in the day which is fast. I'm ready to format it again, but that didn't work last time. After the last format, I copied back files from an external drive so maybe the offending files were hidden in there somewhere. Here are the hard disk drive and RAM specifications. It is upgrade-able to 4 GB of RAM. Hard disk drive: The Fujitsu Mobile MHY2250BH is a 250 GB, standard hard disk drive. Its burst transfer rate is 150 Mbyte/s. This is a 5400 RPM drive and comes with an 8 MB buffer. RAM: two sticks of 1 GB DDR2 SDRAM, speed: 667 MHz.

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• What to do with a broken OS X install disc?

  - by slhck

  First things first: I don't appreciate software piracy and I really want to spend money on software that I use and that I work and make money with. I don't want this question closed just because I consider downloading software, I only want honest opinions and alternatives. Here we go: So I have my OS X Snow Leopard Upgrade DVD, but it's horribly scratched and won't boot anymore. It endlessly loads and at some point I have to force pull it out of the disc slot. How can I reset my Mac then? Can I take my original disk to an Apple Store and ask them for a replacement? Will they believe me, even if I don't have the receipt anymore? Would owning the original disk make it okay for me to look somewhere on the internet and download it? I don't even know if that will work without hassles. Could I try to read the disk to an image with some error correction methods? Maybe during boot it can't read some files, but some other program can? Is there any other way of resetting the Mac? Mine's now over 3 years old an I seem to have misplaced my original discs that had 10.4 on it. Or should I just buy a new 10.6 upgrade disk? (Which is not really what I want to do) Answers and opinions would be much appreciated.

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• MD RAID 1 with external bitmap doesn't fully resync

  - by user64744

  I have an interesting configuration: dual boot system with a RAID 1 that needs to be visible in both Windows and Linux. The Windows install is Win 7 Enterprise, and the Linux install is Kubuntu 10.04. To get the RAID to work, I set it up using Windows's "Dynamic Disks" RAID 1, and brought it up in Linux using MD with no persistent superblock, and a write-intent bitmap on another partition. (Without this bitmap, MD had no way of knowing that the array was in sync, and would do a complete resync every time the array started.) The array is assembled like so: mdadm --build /dev/md1 -l 1 -n 2 -b /var/local/md1.bitmap /dev/sdb2 /dev/sdc2 I expected that the first time I ran this command, it would resync the array, write out a bitmap with no dirty chunks, and all would be good. This wasn't the case: after completing the resync, the bitmap was mostly clean, but about 5% dirty blocks remained, as revealed by mdadm -X /var/local/md1.bitmap I didn't mount the filesystem on /dev/md1 or touch it in any other way. I then found that stopping and restarting the array: mdadm --stop /dev/md1 mdadm --build /dev/md1 -l 1 -n 2 -b /var/local/md1.bitmap /dev/sdb2 /dev/sdc2 did indeed read in the bitmap, with an ensuing resync that went quickly because most of the blocks were marked clean. The confusing part is that this resync further reduced the number of dirty blocks, but still did not remove all of them. By repeatedly stopping and restarting I could slowly bring the dirty block count down to around 0.6%, where it seemed to level out. Any ideas what could be causing this? It smells to me of a race condition somewhere that leads to blocks either being skipped over during synchronization or not properly cleared from the bitmap, but I really have no evidence to prove this. It doesn't look like hardware issues since both drives are new and have zero read errors and reallocated sectors reported by smartctl -a.

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• Can't write to samba share

  - by Tiddo

  I try to setup a samba file server, but whatever I do I can't get write access to work (reading works fine). This is my current situation: I have a local fileserver with 3 harddisks mounted at /mnt/share/disk<nr>. 2 of these use the ext4 filesystem, the third one is ntfs. This file server runs Fedora 18 32-bit. The root folders of these harddisks are owned by superman:superman, and testparm outputs the following: [global] workgroup = WORKGROUP netbios name = FILE_SERVER server string = Samba Server Version %v interfaces = lo, eth0, 192.168.123.191/8 log file = /var/log/samba/log.%m max log size = 50 unix extensions = No load printers = No idmap config * : backend = tdb hosts allow = 192.168.123. cups options = raw wide links = Yes [share] comment = Home Directories path = /home/share/ write list = superman, @users force user = superman read only = No create mask = 0777 directory mask = 0777 inherit permissions = Yes guest ok = Yes I've tried a lot to get this to work: the disk are chmodded to 777, I've tried turning off selinux, I've added the samba_share_t label to the disks and as can be seen in the above output I tried to make the smb config as permissive as I could, but still I cannot write to the share (tried from Windows 7 and another Fedora installation). What can I try to be able to write to the shares? EDIT: The replies I got so far are mostly concerned with the smb.conf. I have however tried a lot of different setup, ready made configs, and solutions to similar problems for the smb.conf file, so I suspect that the real problem is somewhere else.

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• Why cache static files with Varnish, why not pass

  - by Saif Bechan

  I have a system runnning nginx / php-fpm / varnish / wordpress and amazon s3. Now I have looked at a lot of configuration files while setting up the system, and in all of them I found something like this: /* If the request is for pictures, javascript, css, etc */ if (req.url ~ "\.(jpg|jpeg|png|gif|css|js)$") { /* Remove the cookie and make the request static */ unset req.http.cookie; return (lookup); } I do not understand why this is done. Most of the examples also run NginX as a webserver. Now the question is, why would you use the varnish cache to cache these static files. It makes much more sense to me to only cache the dynamic files so that php-fpm / mysql don't get hit that much. Am I correct or am I missing something here? UPDATE I want to add some info to the question based on the answer given. If you have a dynamic website, where the content actually changes a lot, chaching does not make sense. But if you use WordPress for a static website for example, this can be cached for long periods of time. That said, more important to me is static conent. I have found a link with some test and benchmarks on different cache apps and webserver apps. http://nbonvin.wordpress.com/2011/03/14/apache-vs-nginx-vs-varnish-vs-gwan/ NginX is actually faster in getting your static content, so it makes more sense to just let it pass. NginX works great with static files. -- Apart from that, most of the time static content is not even in the webserver itself. Most of the time this content is stores on a CDN somewhere, maybe AWS S3, something like that. I think the varnish cache is the last place where you want to have you static content stored.

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• Can't upgrade NVIDIA GeForce 310M display driver on Acer Aspire 5745PG

  - by Emerson

  I've been for days already trying to update my video driver. I have an Acer Aspire 5745PG with a "NVIDIA GeForce 310M" board, and I was trying to run Sony Vegas video editor with Boris Continunn plugins. It happened that some of the plugins, like BCC Text Extrude wouldn't work, showing the message "Insufficient depth resolution to run Blue". I then read somewhere that updating the display driver would do the trick. That was when my nightmares started, I lost already good 3 nights trying to sort this out, without success :( The display driver that was before (and that I current have after restoring) was the version 8.16.11.8997. First thing I tried was downloading the 8.17.12.6619 driver directly from Acer, which was shown as the latest version from Acer website: http://support.acer.com/product/default.aspx?modelId=2466 Running it would say "Diver Package Failure - Setup failed to read the required Display Driver to be used with this package" I then tried directly the NVIDIA own driver, which the latest was version 296.10: http://us.download.nvidia.com/Windows/296.10/296.10-notebook-win7-winvista-64bit-international-whql.exe That gave me similar error message :/ So after some researching I found out that some people had the same issue and they had to change the configuration file to allow the installer to recognize this NVIDIA board: http://forums.nvidia.com/index.php?showtopic=222904 That topic said to look for the "Device Instance Id" property of the "NVIDIA GeForce 310M" display , which I couldn't find, instead I found the "Hardware Id", which seemed to be the right one. I followed the instructions and changed the inf file first for the Acer installation, and after for the NVIDIA own driver. It actually managed to go ahead with the installation in both instances, but the only thing I got was a black screen, while the computer still apeared to be running fine. I had to hard reset, and then it would come back with generic vga driver. I could only get my display back using the recovery function. I imagine thousands of this notebook was sold, and it can't have its driver updated?? Could someone help me with this?? Thanks Echo

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• Blink build with Xcode failed

  - by Merci

  I found a GPL-ed SIP client for Mac, Blink. I'd like to build it from source since the binaries are only available as paid download. Just FYI i'm studying programming at university but have no experience in building complex application from source. After downloading the content of the repository i opened the Xcode project and tried to build on OS X 10.7, Xcode 4.2.1. Unfortunately the build fail with 1 error and many warnings Most of the warnings are like this: Attribute Unavailable: Custom Identifiers in Interface Builder versions prior to 3.2 The error message is: Apple Mach-O Linker (ld) Error Command /Developer/usr/bin/clang failed with exit code 1 preceded by the warning Apple Mach-O Linker (ld) Warning directory not found for option '-L/Users/Sergio/Downloads/Blink/devel.ag-projects.com/repositories/public/blink-cocoa/Distribution/Frameworks' I notice that in the list of required files i have this files missing: Dependencies/Frameworks libgcrypt.11.6.0.dylib libgcrypt.11.dylib libgnutls-extra.26.dylib libgnutls.26.dylib libgpg-error.0.dylib libintl.8.dylib liblzo.1.dylib libtasn1.3.dylib Dependencies/Resources lib Frameworks/Linked Frameworks Sparkle.framework Products Blink.app It should be possible to download these files somewhere. Unfortunately googling did not help. There's no documentation on the project site.

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• Can I still restore partition table?

  - by Johannes Lund

  Once I was going to resize partitions on my Mac HD from Bootcamp. I changed my mind and was going to quit, but apparently I hit a button, which made every single mac partion dissapear, and windows 7 refused to restart and be reinstalled. The 1 TB large HD consists of 3 partions, I believe. Since I can't see their actual size (except bootcamp), this is how I recall it. Macintosh HD about 500GB (Somewhere around 700GB according to disk utillity, but 500 according to Finder, and 500GB was all I could access.) Lion Recovery disk Bootcamp 293.36 GB To fix this I connected my mac via target disk mode to a pc and ran TestDisk. However this is the results: Since I Don't have 10 reputation I cant post the image showing the testdisk results, so I post a link instead hoping it is ok. The two mac partitions' sizes are completely wrong, and BOOTCAMP isn't showing. I tested using disk utilities from the snow leopard dvd. There there is one 293.36 GB Mac OS Extended partition. Before I had the firewire cable for target disk mode I tried reinstalling windows. Without success I tried again formating BOOTCAMP. Was that a bad thing to do? Could it have overwritten data from Macintosh HD? Unfortunately I have no backup. I could bring it to some kind of computer repair firm though.

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• python reports socket in use, netstat and others claim its not

  - by captainmish

  We have a strange socket issue with a RHES3 box: Python 2.4.1 (#1, Jul 5 2005, 19:17:11) [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-52)] Type "help", "copyright", "credits" or "license" for more information. >>> import socket >>> s = socket.socket() >>> s.bind(('localhost',12351)) Traceback (most recent call last): File "<stdin>", line 1, in ? File "<string>", line 1, in bind socket.error: (98, 'Address already in use') This seems normal, lets see what has that socket: # netstat -untap | grep 12351 {no output} # grep 12351 /proc/net/tcp {no output} # lsof | grep 12351 {no output} # fuser -n tcp 12351 {no output, repeating the python test fails again} # nc localhost 12351 {no output} # nmap localhost 12351 {shows port closed} Other high ports work fine (eg 12352 works) Is there something magic about this port? Is there somewhere else I can look? Where does python find out that socket is in use that netstat doesnt know about? Any other way I can find out what/if that socket is?

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