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• RAID FS detection at boot time

  - by alex

  An excerpt from dmesg: md: Autodetecting RAID arrays. md: Scanned 2 and added 2 devices. md: autorun ... md: considering sdb1 ... md: adding sdb1 ... md: adding sda1 ... md: created md1 md: bind<sda1> md: bind<sdb1> md: running: <sdb1><sda1> raid1: raid set md1 active with 2 out of 2 mirrors md1: detected capacity change from 0 to 1500299198464 md: ... autorun DONE. md1: unknown partition table EXT3-fs (md1): error: couldn't mount because of unsupported optional features (240) EXT2-fs (md1): error: couldn't mount because of unsupported optional features (240) EXT4-fs (md1): mounted filesystem with ordered data mode Is it OK that kernel tries to mount an ext4 raid as ext3, ext2 first? Is there a way to tell it to skip those two steps? Just in case: /dev/md1 / ext4 noatime 0 1 TIA.

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• Why aren't connections released by the tomcat AJP connector

  - by Chris

  I have here a jboss with a web application. The tomcat is configured to use the ajp connector. Incoming connections are tunneled via an apache reverse proxy to the connector. Now I recognized that under heavy load the connector keeps a bunch of connections in "keep alive" mode for eternity and doesn't release them any more. With the normal HTTP connector the app did well, but now with the ajp connector we have regular app stallments. Can someone give me some advice where to start to look to resolve this issue? Why does the connector not release the connection again after idling for 300 secs? thanks, chris

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• Setting up a NetApp as a simple FC LUN carver

  - by MikeyB

  For a particular application, I want to configure a NetApp filer (7-mode) to be as close as possible to an old-fashioned storage subsystem without snapshots or fancy features. vol create vol_ESX -s volume aggr1 1500M vol options vol_ESX nosnap on vol options vol_ESX nosnapdir on vol options vol_ESX fractional_reserve 0 snap sched vol_ESX 0 0 0 snap reserve vol_ESX 0 # Ensure no snapshots exist on vol_ESX snap list vol_ESX # Create a LUN or multiple LUNs that take up the entire volume lun create -s 1565523968 -t vmware /vol/vol_ESX/lun0 lun map /vol/vol_ESX/lun0 challenger Is this safe? Is this the Best Way of doing what I'm trying to accomplish? Is there anything else I should set?

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• Changing location of ClamAV logging files

  - by GrumpyCanuck

  I've run into a weird problem with ClamAV that I have been unable to resolve, due to a incredibly non-informative error message. I've installed ClamAV via aptitude on an Ubuntu box (ClamAV 0.96.5/13202 according to the system) up on EC2 and it is 100% stock. We have an additional drive mounted under /mnt where we put all our log files. When I start it up with the log files in the default location, it runs just fine. However, if I change the configuration file from /var/log/clamav/clamav.log to /mnt/clamav/clamav.log I get the error ERROR: Can't open /mnt/clamav/clamav.log in append mode (check permissions!). ERROR: Can't initialize the internal logger It's the same file with the same permissions on it, just in a different location. Any thoughts or tips on how to resolve this problem would be greatly appreciated.

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• Java process failure (hadoop, hbase)

  - by Vladimir

  Anytime I am running hadoop/hbase process from a command prompt I get an error: /usr/local/hadoop/bin/hadoop: line 320: /usr/lib/jvm/jdk1.7.0/bin/java: cannot execute binary file /usr/local/hadoop/bin/hadoop: line 390: /usr/lib/jvm/jdk1.7.0/bin/java: cannot execute binary file /usr/local/hadoop/bin/hadoop: line 390: /usr/lib/jvm/jdk1.7.0/bin/java: Success I get the same kind of error when I start hbase. java version "1.7.0_07" Java(TM) SE Runtime Environment (build 1.7.0_07-b10) Java HotSpot(TM) Server VM (build 23.3-b01, mixed mode) Could you please tell me what could cause the issue? Thank you

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• Mysqldump causes "Too many connections"

  - by vbachev

  A scheduled backup using mysqldump on one of our databases is causing Too many connections. The database is of both InnoDB and MyISAM tables with size of around 500Mb. The Too many connections appears for about 2-3 minutes We understand that mysqldump locks the tables and causes all other queries and connections to pile up and jam the mysql server. We need frequent backups and we cannot afford server downtime or putting websites in maintenance mode while doing it. Our websites are global and traffic is high all the time so its hard to find a moment for backups. How can we avoid downtime during backups?Is there maybe a way to use mysqldump in way that it will not lock all tables at the same time?Is there an alternative to backing up with mysqldump?

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• Is this a common/bug on this PPPoE setting for Cisco ASA 5505?

  - by DCAlliances

  We have to change the way the firewall setup due to we've changed the internet provider. The way we setup we have ADSL modem and we have to do a full bridge mode and the firewall configuration has to change from Static IP to Use PPPoE option on Outside interface with PPPoE username and password, CHAP authentication, WAN IP and WAN subnet mask. [See the attachment] It's been working ok with the use of PPPoE option however the issue is that if we un-plug the power cable of the firewall. This "Outside" interface turned to blank - NO WAN IP, PPPoE username and password. So basically, we have to retype this information again. Is this common or a bug? Any ideas? Thanks

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• Mac OS X - rmdir fails with "Operation not permitted" for a folder created by a PC on a removable dr

  - by maxint

  Hello. I have a problem (using Mac OS X 10.5.8) with the access rights of a folder that was presumably created by a virus on a disk-on-key drive when I used it with a PC. I can't remove the folder or change it's name. In Finder's Info window the Lock box is unchecked and uncheckable - if I try to check it it flips back to off. Please see the details: MaxBookAir:GARMIN'S maxint$ rmdir winamp_cache_0001/ rmdir: winamp_cache_0001/: Operation not permitted MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ mv winamp_cache_0001 test mv: rename winamp_cache_0001 to test: Operation not permitted MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ GetFileInfo winamp_cache_0001 directory: "/Volumes/GARMIN'S/winamp_cache_0001" attributes: avbstclinmedz created: 12/23/2009 14:34:52 modified: 02/13/2010 22:52:36 MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ stat -x winamp_cache_0001 File: "winamp_cache_0001" Size: 32768 FileType: Directory Mode: (0777/drwxrwxrwx) Uid: ( 502/ maxint) Gid: ( 20/ staff) Device: 14,5 Inode: 7439 Links: 1 Access: Wed Dec 23 00:00:00 2009 Modify: Sat Feb 13 22:52:36 2010 Change: Sat Feb 13 22:52:36 2010 MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ stat -r winamp_cache_0001 234881029 7439 040777 1 502 20 0 32768 1261506600 1266081756 1266081756 1261559092 131072 64 32768 winamp_cache_0001 MaxBookAir:GARMIN'S maxint$ MaxBookAir:GARMIN'S maxint$ ls -lTd winamp_cache_0001/ drwxrwxrwx 1 maxint staff 32768 Feb 13 22:52:36 2010 winamp_cache_0001/ MaxBookAir:GARMIN'S maxint$

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• Can I drive two external screens from an 'Alu' iMac?

  - by robsoft

  I've got a 24" 2.4 Ghz Core 2 Duo iMac. It's about 18 months old, though I can't specifically remember when I bought it. It has a Displayport Mini-DVI socket on the back, and currently I have that linked to a DVI adaptor driving a Philips 20" widescreen monitor in portrait mode (awesome for browsing). I have another, identical Philips monitor and wondered if there was a way of connecting that to the iMac too. Is there such a thing as a DisplayPort Mini-DVI to dual-DVIs adaptor? Can this iMac's graphics card even drive such a set-up? The graphics chipset in the iMac is reported as ATI Radeon HS2600, 256 MB. The main iMac display is 1920x1200 and the Philips display is 1050x1680 (@60Hz, rotated 90 degrees). The third screen would be another 1050x1680 and ideally I'd have it portrait again, too. EDIT: Please let this question stand - it's not a dupe. The current Mac laptops use 'Mini Displayport' connectors, which are not the same as DisplayPort Mini-DVI connectors.

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• Temporarily Utilizing 304 Header on Apache for Crawlers

  - by Volomike

  I have a client who has a hosting arrangement with 400 customer sites all hosted through SuPHP in CGI mode on Apache. The sysop is now gone and the client is calling on me for rolling out a new PHP thing. Trouble is -- server load is very high right now and we have found that it's due to the crawlers. We had one customer in particular who complained of slow websites, and we engaged a 304 header plugin in his site against most crawlers, and his site perked right up. We'd like to lower that load by issuing a global 304 header to all the crawlers, letting human visitors through. I have a long list of user agent keywords to trap for. What's the best way to temporarily engage that global 304 header, while allowing human visitors to get right on through? I mean, I could roll out 400 .htaccess file changes, but it would be ideal to make this change in like one central Apache config and then it automatically affect all the sites at once.

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• page allocation failure - am I running out of memory?

  - by mfriedman

  Lately I've noticing entries like this one in the kern.log of one of my servers: Feb 16 00:24:05 aramis kernel: swapper: page allocation failure. order:0, mode:0x20 This is what I'd like to know: What exactly does that message mean? Is my server running out of memory? The swap usage is quite low (less than 10%), and so far I haven't noticed any processes being killed because of lack of memory. Additional information: The server is a Xen instance (DomU) running Debian 6.0 It has 512 MB of RAM and a 512 MB swap partition CPU load inside the virtual machine shows an average of 0.25

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• HFS for Windows by Paragon BSOD

  - by texmex5

  Installed HFS for Windows 7 yesterday. Did a reboot. Copied some files from my internal drive to external hfs drive. Did another reboot and rebooted to Mac. Mac worked fine. Then yesterday the battery went dead on my mac and the computer switched off. This morning tried to boot into windows but got a BSOD as soon as I moved my mouse in the login screen. BSOD refeers to an error with service HFSPLUS.SYS Now when I try to boot into mac (pressing alt while restarding) the mac drive isn's shown and I can only boot into Windows 7 Safe Mode. Cannot uninstall HFS for Windows the uninstaller in control panel says: "THE WINDOWS INSTALLER SERVICE COULD NOT BE ACCESSED. THIS CAN OCCUR WHEN WINDOWS INSTALLER IS NOT CORRECTLY INSTALLED". SETUP: Intel Core 2 Duo, P8600 @ 2.40GHZ, 4GB RAM, WINDOWS 7 ULTIMATE 32 BIT

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• Everything Windows Explorer does hangs up t some time or another

  - by William Barnes

  Yes this is a duplicate of something I have tried to ask in the past. I think I am posting wrong since my first question was deleted OK I ran SCANNOW nd it came back with no problems. I booted in Safe mode and windows evplorer worked OK. I am not sure what that proves. I also ran AUTRUNS and disabled everything that you said, but it still dies. I read someplace that it could be a service program, but I can't find that link anymore. Something about shutting off all non-windows SP's and then start adding back SP's until it quits. The problem is that sometimes it will work, but most of the time it does not. Makes saving or retrieving anything impossible. SAVEAS hangs up, my Garmin Map updater hangs up etc.. I was having this problem before installing Garmin so I am reasonably sure it is not the problem HELP PLEASE, I don't have many brain cells left and can't afford to lose more.

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• How can I dual boot a UEFI OS and a legacy boot OS, or convert stock Windows 8 to BIOS?

  - by The Great Widi

  I have a computer (HP Pavilion g6-2342dx) which came with Windows 8, and thus the new UEFI boot system. I would like to install a few OS's which are not EFI compatible, and Arch GNU/Linux with BIOS mode. However, I would not like to completely wipe all my files to set to legacy. My preferred options would be to: 1. Multiboot legacy OS alongside my EFI os 2. Convert Windows 8 and Ubuntu to legacy without reformatting or switching to MSDOS part table. If anyone could suggest a solution or a method, your help would be appreciated! Thanks!

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• Url rewriting stops working after changing default port on iis7

  - by Somesh

  I have migrated the IIS6 webserver 2003 websites to IIS7 webserver 2008 using msdeploy tool. Application pool setting are changed with "Enable 32-bit Applications=true", "Managed_Pipeline_Mode=Classic","Identity=NetworkService" Framework=v1.1/2.0. All the websites are working fine on default port along with url rewriting migrated from iis6. When I start the webserver on port other than default port by changing bindings, url rewriting stops workings and get 404 error in logs. I think I don't have to change the handler mapping cause I am running it in classic mode. How can I troubleshoot this?

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• How do I recover from a Linux CentOS 4.6 Operating System Crash

  - by Greg Omebije

  Our x86 Linux server running CentOS4.6 has crashed. The machine boots only to the Grub prompt. We have tried using the "rescue mode" to recover the System, but it hasn't worked. How can we fix this problem, so that the machine boots normally? How can we fix this problem to the point were we can recover our files from the server Our Linux Server Configuration: Dell PowerEdge 1950 Intel Xeon 2 HDD (146GB each) 4GB RAM Hardware and Software raid setup CentOS 4.6 We used Sysrecord to boot the computer: the following are the output of fdisk -l Disk /dev/sda: 293.3 GB, 292326211584 255 heads, 63 sectors/track, 35539 Cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000080 Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 17769 142625070 8e Linux LVM

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• local cache for NAS or network folder

  - by HugoRune

  I am planning to build a network attached storage (NAS) server. Is there a way to cache frequently acccessed files from the remote storage automatically on the local PC? (I am not looking for a way to sync whole folders like rsync, but rather something that automatically and transparently caches the last accessed 50 gb of files.) Ideally I am searching for something that caches writes as well as reads, since only one pc will be accessing the server (and one day of lost changes if the local cache is damaged would be acceptable) I looked into windows offline files, but as far as I could tell this requires manual interaction to disconnect the server or go into offline mode in order to use the cache. The server would probably be running Linux or freeNAS, the pc runs Windows xp, but could be upgraded to 7 if required.

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• FileZilla Server Configuration Problems

  - by LiamB

  I've set-up FileZilla server a Windows 2008 Machine, I then created the user, password and added a share folder which I set to Home Directory. I then connect to the server from the client computer Status: Connecting to {IP} Status: Connection established, waiting for welcome message... Response: 220-Welcome To {NAME} FTP Response: 220 {DOMAIN} Command: USER {USER} Response: 331 Password required for {USER} Command: PASS ********* Response: 230 Logged on Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/" is current directory. Command: TYPE I Response: 200 Type set to I Command: PASV Response: 227 Entering Passive Mode ({}DATA) Command: MLSD The connection works fine, however no remote directory is selected, it shows as "/" however uploading any file fails. Any suggestions on how to debug this more?

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• configure pppoe on wrt54gl(openwrt)

  - by sunny

  Hi, I have home DSL connection from my ISP with a beetel modem at my end. I want to make my network wireless, so i bought a linksys wrt54gl and installed open-wrt on it. My ISP provides dynamic IP's with me connecting via pppoe. My question is how do I configure openwrt to work with this. Please suggest what option should I go with, or any other you recommend. DSL cable--Beetel Modem-- Wrt54gl in bridge mode with beetel modem doing the pppoe and having a DHCP server. DSL cable--Wrt54gl with wrt54gl handling the pppoe. Is option 2 possible, can I have a setup without bringing the beetel modem in the picture at all?

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• Change smtp name

  - by Misterb

  Hello, My question is probably very easy to answer but I have been struggling with this the whole day. Actually, I would like to change my smtp.mail name and account that is shown as sending the emails in the header. I changed the "From" but it shows only in the "visible" part of the email and there are values that are different in the header. In this example : Received-SPF: pass (google.com: domain of [email protected] designates 67.221.174.127 as permitted sender) client-ip=67.221.174.127; Authentication-Results: mx.google.com; spf=pass (google.com: domain of [email protected] designates 67.221.174.127 as permitted sender) [email protected]; dkim=pass (test mode) [email protected] [email protected] account=bounce Thank you in advance!

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• Calibrating Displays in Boot Camp 3.0 on MacBook with external display

  - by Brian Reiter

  The LED display on my MacBook Pro is very blue-ish without correction. In OS X the advanced mode of the display color calibration tool is excellent and I can largely color-correct the display. Windows 7 incorporates a color calibration tool but it is less powerful. It largely consists of a software gamma correction tool and color charts to use with the hardware controls on your display (which don't exist on a notebook or an apple external display). How can I color-correct Windows in Boot Camp to match the OS X correction without using a Spyder or other special calibration hardware?

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• Pysdm has disabled my ability to write to my storage partition

  - by Atlas

  I have a dual boot setup with Windows 7 and Mint 13 Cinnamon. As well as their respective partitions I also have a large one (NTFS) for storing all my music, videos, documents etc. I downloaded pysdm as I was told it would enable me to configure Linux to auto-mount my storage partition. It has indeed been helpful in auto-mounting my storage. However, since installing it I can no longer write to the partition which makes 500GB of my hard drive utterly useless! I've tried to unselect the "Mount file system in read only mode" option, but the program keeps re-checking it after I close that window (and even when I click apply). Why is it doing this and how can I get it to recognise that I need to read AND write on that partition?

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• Ubuntu Server 12.04 LTS on Hyper-V 2012

  - by user137533

  I have the following scenario: Hyper-V 2012 server core installation. On top of this i created a virtual machine on which i tried installing Ubuntu Server 12.04 which should not have any compatibility issues according to what Microsoft and Ubuntu are saying (although it is not officially supported). I start, run the installation and everything is ok, no problems detecting the network device or the hard drive (unlike debian which didn't even detect the hard drive). Once the installation is complete it asks me to reboot, it unmounts the "dvd drive" and reboots. Once it tries to start again i get the following error: Boot failure. Reboot and Select proper Boot device or Insert Boot Media in the selected Boot device. It seems to not be booting up from the virtual hard drive. The hard drive is set up in SCSI mode, nothing mounted on the IDE controller (no iso image or anything else. Does anyone have any ideas on what i can do to solve this?

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• How to use NTFS-3G installed using MacPort?

  - by Raiyan Kabir

  After upgrading to Lion I'm having problem mounting NTFS drives in read/write mode. This is because NTFS-3G distributed by http://www.tuxera.com does not work with Lion. As far their suggestion I installed NTFS-3G using MacPort. But as far as I can see it does not come with the usual preference pane. Its not enabled by default. Do anyone know how to enable it? Or how to have the Preference Pane for the NTFS-3G from MacPorts.

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• Dell PR03X port replicator and DisplayPort to DVI adapter not detecting second monitor

  - by yothenberg

  I have a Dell M4400 connected to a PR03X port replicator/docking station. I use the DVI port to connect it to a first Dell 2208WFP monitor and I'm trying to use a DisplayPort-to-DVI adapter to connect it to a second Dell 2208WFP monitor. The second monitor, connected via the DisplayPort-to-DVI adapter immediately goes into sleep mode and the laptop doesn't detect it. What is really weird is that it did detect it the first time I plugged it in but after I unplugged the monitor and plugged it back in it stopped working. I swapped the monitors round and it detected them both but after unplugging the monitor connected via the DisplayPort-to-DVI and plugging it in again it stopped working. Both monitors work if plugged in directly to the DVI port. Is there some way to force re-detection? Any ideas?

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