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• Why does't rsync use delta-transfer for local files ?

  - by o_O Tync

  I have a big iso image which is currently being downloaded by a torrent client with space-reservation turned on: that means, file size is not changing while some chunks in in (4 Mib) are constantly changing because of a download. At 90% download I do the initial rsync to save time later: $ rsync -Ph DVD.iso /some/target/ sending incremental file list DVD.iso 2.60G 100% 40.23MB/s 0:01:01 (xfer#1, to-check=0/1) sent 2.60G bytes received 73 bytes 34.59M bytes/sec total size is 2.60G speedup is 1.00 Then, when the file's fully downloaded, I rsync again: total size is 2.60G speedup is 1.00 Speedup=1 says delta-transfer was not used, although 90% of the file has not changed. Why?!

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• What virtualization solution should I try next, after hitting problems w/ VMWare Player in dual-netw

  - by Alex R

  I have been using VMWare Player 2.5 for a while (Ubuntu guest on Vista host, 32-bit). VMWare had worked great until now but then I hit a brick wall: Due to some reorganization of my home network, the host machine now has to use a wireless connection to reach the Internet, while the printer, fileserver, and other important stuff are attached to a local gigabit hub. I have tried several tricks, such as editing the .vmx file, changing settings in vmnetcfg, etc, but I'm still unable to get the virtual Ubuntu box to connect each of the two virtual NICs to different networks (I did get it to recognize two NICs, but both DHCP'd onto the gigabit LAN). So, I'm ready to dump vmware for something with a little more low-level control of network settings. Virtualization is such a crowded space, I could spend months evaluating every product out there. I'm hoping for a shortcut... Can anyone recommend the best VM for my situation described above? Thanks

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• Debian/Ubuntu apt or pbuilder without root privileges?

  - by Tem Pora

  I want to use apt or pbuilder to build a package in user's home directory. The home directory has enough space to hold the package's source, its dependencies and binary output. But the apt and pbuilder documents say that you have to be a root user (sudo) to use it. It's frustrating, as the only way now I have at my disposal is to build the package from source or use the dumba$$ (sorry for bad language) dpkg and in both cases figure out every dependency manually, create the dir layout manually and install the built things manually. Now if I can do all these things manually, why the tool writers (apt) think that doing so using their tool (apt) is somehow more special/dangerous? I don't want to use root privileges JUST to build and test a user-land package. If I am NOT allowed to do anything outside my home dir then why NOT the apt or pbuilder type commands be allowed to "build" something in my home dir without root privileges? I just want to use their functionality. It seems there is nothing like Gentoo Prefix from Debian

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• SQL server environment

  - by Olegas D

  Hello I'm considering a bit of changes in current sales environment. And trying to check all cons and pros. Current situation. SQL server (quite decent HP server - server1) + backup server (smaller Dell server - server2). all sql files and sql server itself are on the server1. If something goes wrong with server1 I will have to manually move to server2. Connecting to the sql server: 1 HQ (where server located) + 4 sites through VPN. Now I'm considering 2 scenarios: Buy some storage system + update existing servers (add ram, upgrade processors) and go for VMWare ESXI. Rent a server at a datacenter + rent virtual server in case real server goes down. Also rent some space at data storage to keep SQL files there. Have anyone considered these things and maybe found some good pros/cons list? ;) Thanks

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• How to columnate text with tabs (in vim or on the shell)

  - by kine

  I have a frequent need to manually manipulate tab-delimited text for data entry and other purposes, and when i do this it helps if the text is aligned properly into columns. For example (assuming 4-space tabs): # original format abcdefghijklmnop field2 abcdefgh field2 abcdefghijkl field2 # ideal format abcdefghijklmnop field2 abcdefgh field2 abcdefghijkl field2 I am very familiar with using the column utility to columnate text this way, but the problem is that it uses spaces to align the columns, and i specifically need tabs. This requirement also appears to rule out the Tabularize plug-in. Is there any way that i can columnate text with tabs specifically, either within vim or at the shell? It looks like i might be able to do it with groff/tbl, but honestly i'd rather columnate it by hand than mess with that....

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• How OS comunicates with HW?

  - by Jack

  Hi, how can program runnig on CPU (mostly OS) acess other PC hardware? Such as Graphic card, HDD and so? From what I read, In DOS, this was done using BIOS calls, specifically INT instruction. But, int instruction should only jump to the certain space in RAM. So, how can some program stored in RAM acess other computer HW, when CPU can acess only RAM, and reeive interrupts? And, does windows use int instructions as well, or is there any new way to communicate with HW? Thanks.

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• Cannot Delete "Account Unknown" account in Windows XP SP3

  - by naspinski

  If I Right click on My Computer, Select Properties, then click on Advanced-User Profiles-Settings, I get a list of user accounts on my machine and I see a few that are "Account Unknown" in there with large profiles and I want my space back. I am assuming this is because these users are long gone and AD no longer recognizes their SIDs. The problem is that the Delete button is grayed out, but only for the accounts, the ones that are recognized, I can delete jsut fine. These accounts do not show up in Computer Management at all, and I am an administrator on my machine - any ideas on how to delete them?

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• What's the best encoding for videos on the Zune?

  - by Will

  I've got videos I want to encode to put on the zune. Have the encoding software (using Expression Encoder), but I'm not sure about what I should transcode to. I used the settings built into EE for the Zune, but the sync software still shows these videos are being converted before sync. I already have to get these videos into an acceptable format, so encoding twice is a waste of time and space. What I'm looking for is a video codec, audio codec, bitrate, WxH, and anything else I need to encode a video so it goes straight from my disk onto my Zune without re-encoding.

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• Network Block Device (NBD) clients for Windows or similar solutions

  - by przemoc

  Are there any NBD clients for Windows? Strangely, I cannot find any, or I am searching for them in a wrong way. Such client should be possibly a driver with front-end tool (may be a command-line one) allowing to create virtual drives and associate them with given hosts (or simply localhost) and ports where NBD servers are listening. From user perspective virtual drive should be close to what physical drive is, so it should be accessible as something like \\.\PhysicalDriveX (maybe \\.\VirtualDriveX?), be visible in Disk Management (diskmgmt.msc) and mountvol tools at least. (The only thing I found remotely close to NBD on Windows is ImDisk's proxy mode and companion tool devio, but AFAIK ImDisk only works at partition level (so no virtual drive) and devio uses different protocol.) Secondary question is: Are there any (preferably simple) Windows-specific solutions allowing creation of virtual drive delegating read/write request to user-space via some explicit way (like via TCP, IPC, DLL implementing given API, etc.)?

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• How do you expand a raid disk array in a dell 2850?

  - by johnny

  Hi, I have a Dell 2850 and I want to install Windows 2008 Server. Problem is that my C drive only has 16GB of space. The requirements say I need at least 20. I have an open bay for a drive. If I put in another drive, how can I add that to the array and them make it only for the C drive? what do I do? Thank you. edit: I don't want to remove any drives. I just want to add a new one to the existing array. Can I do that and make sure that new drive is for the logical C drive?

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• What is the right iptables rule to allow apt-get to download programs?

  - by anthony01

  When I type something like sudo apt-get install firefox, everything work until it asks me: After this operation, 77 MB of additional disk space will be used. Do you want to continue [Y/n]? Y Then error messages are displayed: Failed to fetch: <URL> My iptables rules are as follows: -P INPUT DROP -P OUTPUT DROP -P FORWARD DROP -A INPUT -i lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A INPUT -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT -A OUTPUT -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT What should I add to allow apt-get to download updates? Thanks

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• Should all my files be stored on my shared partition?

  - by James

  I am setting up a tripple boot HD and was going to use a 4th partition to share files between OS's. I was wondering if there is any point in having much space on each OS partition to store files or if I just make the shared partition big and put everything on that? Is there any difference in speed between accessing files on the shared partition vs the native files? Are there any other benefits/disadvantages of having files on either the native/shared partition? EDIT: OS's in question are Windows 7, Ubuntu 12.04, and OS X 10.7.4.

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• How do I make an encrypted disk image on Debian?

  - by Blacklight Shining

  I'm basically looking for an equivalent to OS X's encrypted sparsebundles. The solution should have support for file ACLs and should not force me to specify a size in the beginning (the image should only take up as much space as it needs) or require root access to mount and unmount. Ideally, I should be able to set two different passwords (both for the same data), but that's not too important. (I do have root access to the machine and so can install packages and such, but I would rather not have to sudo just to mount an image.)

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• Resized NTFS partition, now it wont mount.

  - by H4Z3Y

  I have had a 1.5TB drive used as an external for 6 months or so, then I decided to put it in my linux server for network storage. ntfs was being crazy inefficient so I wanted to change the filesystem to ext4. I used the ntfsresize command to reduce the partition to 650GB and that took abour 2 hours, then I deleted all of the entries in fstab like a guide told me too and created a new one the size of the ntfs partition, or, 650GB. after I modified fstab the ntfs partition would no longer mount and when plugging it in to windows it says "This Hard Drive needs to be formatted". any ideas on how I can recover the data off of the drive? I have 600GB of free space on a different drive so I just need some way of copying them off.

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• Why do I get a GRUB error after deleting the Linux partition?

  - by nateify

  I had a dual-boot setup with Windows 7 and Windows Vista. I used Easus Partition Manager and shrank my Windows 7 partition. In the empty space, I installed Linux Mint. I decided I didn't want it anymore, I simply deleted the Linux Mint partition. Now when I boot, all I get is this: GRUB loading. error: no such partition grub rescue> I don't have my Windows 7 install disk because it was pre-installed.

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• Reverse lookup of inode/file from offset in raw device on linux and ext3/4?

  - by lilinjn

  In linux, given an offset into a raw disk device, is it possible to map back to an partition + inode? For example, suppose I know that string "xyz" is contained at byte offset 1000000 on /dev/sda: (e.g. xxd -l 100 -s 1000000 /dev/sda shows a dump that begins with "xyz") 1) How do I figure out which partition (if any) offset 1000000 is located in?(I imagine this is easy, but am including it for completeness) 2) Assuming the offset is located in a partition, how do I go about finding which inode it belongs to (or determine that it is part of free space) ? Presumably this is filesystem specific, in which case does any one know how to do this for ext4 and ext3?

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• Lotus notes 8.5 quota

  - by Cividan

  we're using lotus notes 8.5 and I have a user who was over his quota as he had sent 6 email with attachement over 800 MB (no comment...) I deleted these oversized email and empty the trash but domino keep sending email warning about quota. I checked in the all documents view and they are no longer there, I re-did an empty the trash. I saw a post on the internet saying to compact his database, when I go under file, application, properties and click on the info tab, I see that he use 35.7% of the 3 GB database. when I click on "compact" I see a message saying the compact of the database is beeing process... the message disapear after about 1 minutes the message disapear but nothing else seem to happen and when I look back later on the space problem has not changed. any advice would be appreciated.

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• How can you convert audio (3.5mm) to S/PDIF?

  - by SSumner

  I have a monitor that I want to use as my 'TV' for my gaming system. I connect it via HDMI, so sound and video go through the monitor, but I want sound to my headphones, which travels via optical (S/PDIF) cable. The monitor (Dell U2713HM) has a 3.5mm audio jack on it for line out, but I couldn't find anything that simply plugs in an converts the analog audio signal to a digital one so I can plug in a S/PDIF cable. What sort of device do I need to do this? (I am not asking for shopping recommendations, merely what options allow this conversion. I would prefer the smallest option, as space is limited).

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• Problem with Windows Boot Manager after using GParted

  - by Cenoc

  I Get the follow: Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: Insert your windows installation disc and restart your computer. Choose your language settings, and then click "Next." Click "Repair your computer." If you do not have this disc, Contact your system administrator or computer manufacturer for assistance. Status: 0XC0000225 Info: The boot selection failed because a required device is inaccessible. After I tried to expand the Windows partition. I dont know where I put the Windows 7 CD and I was wondering if anyone knew of any way of fixing this problem? I'm guessing I deleted something I shouldnt have deleted....... I actually wanted to get some more space at the expense of the recovery drive. Thanks in advance!

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• MacBook Air with Bootcamp - How to partition?

  - by Andrew

  I want to buy a MacBook Air for my wife with a 128GB SSD. She has to use Windows 7 but I would like to keep OS X for myself to use somtimes. Using Bootcamp, is it feasible to install the following? Mac partition: 36GB with Mac OS X and Microsoft Office 2011 Word, Excel & Powerpoint and Skype. (minimal use) Windows partition: 92GB with Windows 7 professional and Microsoft Office 2010 Word, Excel & Powerpoint, and Skype (daily use) Media to be kept on SD card or external USB3 drive. (Note: Using Parrallels may save space, but my wife won't go for the user experience)

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• Full/Differential backup - what's used to determine the differential backup content?

  - by gernblandston

  Let's say I have a 'MyDB' SQL Server 2005 database (simple recovery) in which I do a Full backup on Sunday, and Differentials every other night BACKUP DATABASE [MyDB] TO DISK = N'c:\Database Backups\MyDB\MyDB_Full.bak' WITH NOFORMAT, INIT, NAME = N'MyDB.BAK', SKIP, NOREWIND, NOUNLOAD, STATS = 10 and BACKUP DATABASE [MyDB] TO DISK = N'c:\Database Backups\MyDB\MyDB_Diff.bak' WITH NOINIT, DIFFERENTIAL, NAME= 'MyDB.BAK', STATS= 10 What does the differential backup process use to decide what data gets backed up on the differential nights? Does it need the mydb_full.bak file to do its business? If I wanted to save disk space, could I zip up the mydb_full.bak file to a .zip file after it's created without adversely affecting the differential backups, and if I needed to restore, just unzip the full backup before starting?

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• Add SATA Port to Motherboard?

  - by YAS

  I recently took off the bottom covers to my laptop, an Aspire 6930, and one of the covers was hiding an empty space large enough for a second hard drive. The bit of motherboard that was showing had the solder joints for a SATA port, but no port. What I'm wondering is; If I get a spare SATA port and solder it in would it mess up my motherboard and kill my laptop? I'm not concerned about a clean solder job, I can do that. But if the port is soldered in cleanly if there would be any danger to doing it. It'd be pretty darn awesome to get a second hard drive in my laptop.

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• how can I get back /usr/local/bin/mysql on Snow Leopard?

  - by Ole Media

  From terminal and trying to uninstall macports, I ran a command, rm -rf / macports...., that erased bunch of stuff. I feel ashamed about this, not realizing the space after /. Since then, mysql is running but I cannot execute any of the mysql commands because it is not under /usr/local/bin/ I went ahead an reinstall mysql but without luck. What steps do you recommend on doing in order to be able to run mysql, mysqlduml, mysqladmin, from terminal? I can access databases from phpmyadmin, so mysql is running, don't ask me how.

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• Default maximum heap size -- Ubuntu 10.04 LTS, openjdk6-jre

  - by sachin

  I just installed openjdk6-jre on Ubuntu 10.04 java version "1.6.0_20" OpenJDK Runtime Environment (IcedTea6 1.9.2) (6b20-1.9.2-0ubuntu1~10.04.1) OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode) Every time I run "java" I get this error: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. This can be solved by specifying a maximum heap size and running "java -Xmx256m" But is there anyway to permanently fix this error (i.e. set the default heap size to 256MB so that I do not need to specify the max heap size every time I run the command)

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• Crap, hard disk failure. Can I recover my "move"d folders?

  - by Doug

  I am in the process of moving all my files from an old laptop to new one. I just moved 11gb of data from my old laptop to a hard drive (external) and then upon moving it out to the new hard drive, the hard drive is getting a CRC (Data Error (Cyclic Redundancy Check). Now I am looking for a solution to recover the files that I moved on my old laptop (not the external). I understand they they are just marked for potential overwriting to free up space. I was getting ready to test out GetDataBack, but it says to install it on a healthy windows and use the recover-needed drive as an external. However, I don't want to turn off my computer without first getting the okay since it is in a "moved" state. Please help! What can I do to recover the Moved files. I haven't touched the computer since it has been moved. What can I use to recover them?

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