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• XEN disk mapping problem under opensolaris

  - by Louis

  I have a system with two harddisks, i wanted to use the simplicity of ZFS for my file server and i also need to run a linux. I choosed XEN virtualization for that, supported on both system. My GRUB is well configured and i can boot both system. I would like is to run both system with solaris as a dom0 and the debian installed on the 2nd HD as a virtual machine. My problem is that i want to use the partitions of my 1st harddisk (sda1 under linux) and it does not work. I didn't find my use case on the web- Here is my Opensolaris device name of this partition : /dev/rdsk/c7d0p1 But when i use : disk = [ 'phy:rdsk/c7d0p1,sda1,w' ] as a disk mapping in my XEN configuration file i have the error : Error: Device 2049 (vbd) could not be connected. error: "rdsk/c7d0p1" is not a valid block device. I am "lost".

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• How to uncompress a 9GB file in Windows FAT32

  - by Kashif

  I have a 2GB RAR file that contains a 9GB video file. I'm using a FAT32 file system. Now I want to unzip that file but after 4GB I get an error due to the FAT32 file size limit. Now I want to know that how I can extract that video? I know that one way is to convert my partition to NTFS but I don't want to follow that way. I've also tried 7-zip but that again gives error after 4GB. One other way is to split that file but I don't know how I can split a video file that is zipped. So any idea please? How can I get rid of this problem.

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• How to boot RHEL with no bash?

  - by nmelmun

  How can I boot a RHEL VM if I deleted /bin/bash? When trying to boot, I now get the following error: "INIT: Cannot execute "/etc/rc/d/rc.sysinit" The next thing I tried was to modify the kernel boot parameters by adding init=/bin/ksh at the end of the line, which gave me a functional shell. After this, in order to get write permissions, I remounted the root partition with: mount -o remount,rw / Then I tried to boot using ksh as the shell by tricking the system into thinking it's bash: ln -s /bin/ksh /bin/bash Then restarted the system normally. Unfortunately this didnt work since ksh is not compatible and /etc/rc.d/rc.sysinit uses several bash-specific tricks. Does anyone else have a suggestion on how I could get the system to boot normally without reinstalling bash?

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• why is usb disk corrupted by Vista restore

  - by Martin

  I have a laptop with Vista Business on an 80GB disk. I have created a full backup and stored that on the original 80GB drive. On my new 320GB disk, I have created a partition with exactly the same number of bytes as the original 80GB disk. I swap the disks so that the 320GB is internal, and the 80GB is in a USB caddy. I boot from the NEO restore CD and everything looks fine: I select the dump on the USB drive, target is drive C:, start the restore. After a few seconds, the restore fails with "not enough disks in machine or disk not large enough" error (I did note the exact phrase). I then swap the 80GB disk back to the internal drive, but the thing is unbootable. Why has the restore process scrubbed the boot status of the USB drive ?

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• Mac OS X Disk Encryption - Automation

  - by jfm429

  I want to setup a Mac Mini server with an external drive that is encrypted. In Finder, I can use the full-disk encryption option. However, for multiple users, this could become tricky. What I want to do is encrypt the external volume, then set things up so that when the machine boots, the disk is unlocked so that all users can access it. Of course permissions need to be maintained, but that goes without saying. What I'm thinking of doing is setting up a root-level launchd script that runs once on boot and unlocks the disk. The encryption keys would probably be stored in root's keychain. So here's my list of concerns: If I store the encryption keys in the system keychain, then the file in /private/var/db/SystemKey could be used to unlock the keychain if an attacker ever gained physical access to the server. this is bad. If I store the encryption keys in my user keychain, I have to manually run the command with my password. This is undesirable. If I run a launchd script with my user credentials, it will run under my user account but won't have access to the keychain, defeating the purpose. If root has a keychain (does it?) then how would it be decrypted? Would it remain locked until the password was entered (like the user keychain) or would it have the same problem as the system keychain, with keys stored on the drive and accessible with physical access? Assuming all of the above works, I've found diskutil coreStorage unlockVolume which seems to be the appropriate command, but the details of where to store the encryption key is the biggest problem. If the system keychain is not secure enough, and user keychains require a password, what's the best option?

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• Possible to IPSec VPN Tunnel Public IP Addresses?

  - by caleban

  A customer uses an IBM SAS product over the internet. Traffic flows from the IBM hosting data center to the customer network through Juniper VPN appliances. IBM says they're not tunneling private IP addresses. IBM says they're tunneling public IP addresses. Is this possible? What does this look like in the VPN configuration and in the packets? I'd like to know what the source/destination ip/ports would look like in the encrypted tunneled IPSec Payload and in the IP packet carrying the IPSec Payload. IPSec Payload: source:1.1.1.101:1001 destination:2.2.2.101:2001 IP Packet: source:1.1.1.1:101 destination:2.2.2.1:201 Is it possible to send public IP addresses through an IPSec VPN tunnel? Is it possible for IBM to send a print job from a server on their network using the static-nat public address over a VPN to a printer at a customer network using the printer's static-nat public address? Or can a VPN not do this? Can a VPN only work with interesting traffic from and to private IP addresses?

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• Windows system drive letter changed after repair install

  - by taffer

  yesterday I did a repair install, because Windows froze on welcome screen after resizing its partition on a dual boot system. corresponding question Everything worked fine so far, but now I am facing another challenge: The Windows drive letter changed from G: to C:, so that most programs, including drivers, firewall and virus scanner do not work anymore. I tried to reinstall the virus scanner, but the uninstaller said, that drive G: is not available. What to do now, to get all programs running again? Is it possible, to rename C: to G: or will that mess up my system?

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• Vista won't boot - just get black screen

  - by DisgruntledGoat

  When I boot into Windows Vista (Ultimate), I just get a black screen (with the mouse visible and working). If I run in safe mode, it seems to pause for a while when loading crcdisk.sys. A lot of research says it could be a problem with the hard drive, but I dual boot Ubuntu and that works fine and I can still see and use the Windows partition absolutely fine from Ubuntu. I tried using the "startup repair" option on the Vista install disk but it didn't detect any problems. I have run chkdsk several times, with this: chkdsk C: /f /r And also drive D (the recycle bin). The first two times it detected and fixed errors on the C drive but now it doesn't detect any errors. Is there anything else that could be causing this problem?

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• EBS+RAID10+XFS slower than EBS+RAID10+EXT3 using MySQL?

  - by Johann Tagle

  We're currently using EC2 with 16 EBS volumes in RAID10 configuration for our MySQL data. I know some people don't recommend to put EBS volumes to RAID but that's not what I'm concerned about at the moment. Current format is ext3, but we're experimenting with moving to xfs, given many reports that it is faster. However, we're actually experiencing a performance degradation when the partition was converted to xfs - a benchmark run with inserts, updates, selects and deletes was more than 10 seconds slower using xfs. Any idea what could be the problem? Below is the fstab entry (really only changed ext3 to xfs). Database tables are innodb and we are using innodb_file_per_table. /dev/mapper/vg_data-lv_data /data xfs noatime 0 0 Thanks.

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• Preparing a new physical system with VMWare

  - by Max

  I need to create a new installation of Windows, but at the same time I need this computer. So I decided to create a new physical disk from within VMWare, install windows/drivers/software and then just replace the HDD in the computer. I've bought a new HDD, split it into two partions and installed Windows 7 using the VMWare's ability to use phusical disks. I can see the windows files and directories that have been created on this partition, but when I'm replacing the HDD in the host machine it cannot boot from it. Why is that? Is it at all possible to create a bootable physical disk with VMWare or I should create a virtual disk and then use some HDD imaging tool to copy the HDD image to a physical disk? Maybe there's a better way of installing a new system and working on the computer at the same time?

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• Will my Lenovo One Key Recovery work if I install Ubuntu on my Ideapad U410?

  - by dostiharise

  I own a Lenovo Ideapad U410. Being a game developer the first thing that I wanted to do is install Ubuntu. But I don't want to lose the Windows 7 that ships with the laptop. So, I wanted to know if the Lenovo One Key Recovery mechanism is capable of restoring the Windows 7, from the hidden recovery partition, after I install Ubunutu and enable Grub boot loader? Note: I am already aware that an alternative would be to create Factory Restore disks, to restore when necessary. But I cannot immediately do it unless I buy an External DVD Burner.

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• Free, Linux-based rescue CD for Windows machines

  - by Adam Matan

  Hi, Too often, I'm being called to help a friend who screwed a Windows machine by some creative methods. Th usual remedy is backing up the hard drive contents and reinstalling. Right now, this is done by removing the defected hard drive to my machine. I figured out that using a rescue disk running some version of Linux might ease the process. I'm looking for: NTFS access Partition tools Large variety of drivers (Network, Hard drives, etc.) GUI and some rescue wizards a great plus. Any ideas? Adam

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• Combine drivers from multiple Win7 installs to single image

  - by MikeyB

  I need to prepare a Windows 7 image with drivers for multiple systems (Lenovo laptops). I currently have an image prepared on one laptop type but need to grab the drivers appropriate for the other laptop types as well to ensure that it works on all systems. From what I can tell, the procedure will be: create a boot CD with imageX take a .wim image prepared on the first type of systems take .wim images from the other systems mount the other images in WAIK extract the drivers from the other images inject the drivers into the first .wim boot a system with the boot CD and redeploy the updated .wim image into the Windows partition take an image of the drive with usual imaging tools This all seems a little too convoluted, but I'm willing to do it to get the proper drivers into the image. This is (seemingly) necessarily complicated by having more than one OS on the disk image. Am I on the right track?

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• How to stop scheduled chkdisk on windows 7?

  - by AndrejaKo

  Hi! I have a problem with windows 7 64-bit. I was trying out chkdsk command line options and scheduled a chddsk /r on next start. After that I disassembled the laptop on which I set the chkdsk. After I reassembled it, windows gets normally to the point where it should start the check and then hangs when the countdown reaches 1 second. During the countdown, it doesn't detect any input from keyboard. At first I thought that I didn't correctly install the keyboard, but under GNU/Linux, everything is working fine and I can normally mount the windows partition . So is there any way to stop the scheduled chkdsk? I really don't feel like reinstalling windows again because I just finished setting up my tool-chain the way I like it and compiled about 6GiB worth of dependencies I need for some project I'm working on.

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• Driver for writing to UDF partitions from Windows XP?

  - by davr

  I'm considering using an UDF partition to share data between Windows XP, 7, and Linux. It's more efficient than FAT32, and avoids the 4GB max file size limit. I've found it will also work with Mac OS X, more details in this questions. However, in Windows XP, it is read-only. I'd like to write to it too. Are there any drivers that will allow this? I've found a few that support writing UDF...but they are designed for writing to CDs or DVDs, not specifically for HDDs or USB Flash drives: DLA, InCD, Drag-To-Disc. Will any of those 3 drivers work for HDDs/USB Flash drives? Or is there another driver that will do what I want? Thanks.

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• Upgrading drives on a MD3000

  - by Anonymouse

  Hello, Our MD3000 array is getting full as our databases are growing and we need more spaces. Currently, we use a MD3000 with a two-servers Windows 2003 cluster and 15x 73GB SAS drives. Disk groups are configured in RAID1 of two drives. The approach we are currently investigating is simply swapping the existing SAS drives with bigger ones (300GB instead of 73GB), one at a time, and let each RAID1 array rebuilt. Is it a good approach? Will we be able to resize the array afterwards? Will we be able to resize the partitions afterwards? Can the Dell M3000 Management software do it or will we have to bring the server offline and use some partition software to do it? Thanks in advance.

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• Bootcamp's "Use all F1, F2, etc. keys" switches back automatically

  - by cheeesus

  I use Windows 7 in a Bootcamp partition on my iMac. I always check the option "Use all F1, F2, etc. keys as standard function keys", and when it's checked, everything works great. But recently, something switches this setting back to 'unchecked' every few minutes. I constantly have to open the Boot Camp Control Panel, uncheck the checkbox, check it again and click on 'Apply'. And five minutes later, the F2 key again controls the brightness of the screen and not the renaming of files in Explorer. This is driving me mad. What could be the cause of this? Is there a keystroke to switch this feature?

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• Ubuntu: One or more of the mounts listed in fstab cannot ye be mounted

  - by Phuong Nguyen

  I was enjoying a Movie when my Ubuntu suddenly hung. At the next reboot, here is the message: One or more of the mounts listed in /etc/fstab cannot yet be mounted: /home: waiting for /dev/disk/by-uuid/.... Press ESC to enter a recovery shell. Problems: When I enter recovery shell, I don't know that to do. If I press Ctrl+D, then the message above will reappear. What should I do? I checked with Ubuntu Live CD and my partition looks OK. I have 2 separate partitions for / and /home

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• newbie hard drive upgrade question

  - by musoNic80

  I have an Acer Aspire 3500WLMi laptop. It currently has a 40gb hard drive which I would like to upgrade. Could someone talk me through the process? I've listed my concerns/queries... Can I buy and install any 2.5" SATA or IDE hard drive into this machine? Should I buy somesort of USB caddy and clone my existing drive onto the new one via USB then physically swap the drives over? My current disk is partitioned to include a small amount of space for a Ubuntu install. Will a clone keep the current partition sizes or is it best for me to repartition once I've cloned? Many thanks.

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• WEP/WPA/WPA2 and wifi sniffing

  - by jcea

  Hi, I know that WEP traffic can be "sniffed" by any user of the WIFI. I know that WPA/WPA2 traffic is encrypted using a different link key for each user, so they can't sniff traffic... unless they capture the initial handshake. If you are using a PSK (preshared key) schema, then you recover the link key trivially from this initial handshake. If you don't know the PSK, you can capture the handshake and try to crack the PSK by bruteforce offline. Is my understanding correct so far?. I know that WPA2 has AES mode and can use "secure" tokens like X.509 certificates and such, and it is said to be secure against sniffing because capturing the handshake doesn't help you. So, is WPA2+AES secure (so far) against sniffing, and how it actually works?. That is, how is the (random) link key negociated?. When using X.509 certificates or a (private and personal) passphrase. Do WPA/WPA2 have other sniffer-secure modes beside WPA2+AES? How is broadcast traffic managed to be received by all the WIFI users, if each has a different link key?. Thanks in advance! :).

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• virtual machines and cryptography

  - by Unknown

  I suspect I'm a bit offtopic with the site mission, but it seems me more fitting for the question than stackoverflow i'm in preparing to create a vm with sensible data (personal use, it will be a web+mail+... appliance of sorts), i'd like to protect the data even with cryptography; the final choice have to be cross-platform for the host basically, I have to choose between guest system-level cryptography (say, dm-crypt or similar) or host level cryptography with truecrypt. do you think that the "truecrypt-volume contained virtualized disks" approach will hit the i/o performance of the vm badly (and therefore dm-crypt like approaches into the vm would be better), or is it doable? I'd like to protect all the guest data, not only my personal data, to be able to suspend the vm freely without worrying for the swap partition, etc

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• reiserfsck --rebuild-tree failed: Not enough allocable blocks

  - by mojo

  I have a reiserfs volume that required a --rebuild-tree, but is currently failing to complete when I pass it --rebuild-tree. Here is the output that I receive when running it: reiserfsck 3.6.19 (2003 www.namesys.com) # reiserfsck --rebuild-tree started at Mon Oct 26 13:22:16 2009 # Pass 0: # Pass 0 The whole partition (7864320 blocks) is to be scanned Skipping 8450 blocks (super block, journal, bitmaps) 7855870 blocks will be read 0%....20%....40%....60%....80%....100% left 0, 9408 /sec 287884 directory entries were hashed with "r5" hash. "r5" hash is selected Flushing..finished Read blocks (but not data blocks) 7855870 Leaves among those 6105606 Objectids found 287892 Pass 1 (will try to insert 6105606 leaves): # Pass 1 Looking for allocable blocks .. finished 0%....20%....40%....60%....80%....Not enough allocable blocks, checking bitmap...there are 1 allocable blocks, btw out of disk space Aborted I can't mount it, and I can't fsck it. I've tried extending the volume, but that hasn't helped either.

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• How can I find out which driver/file is being loaded when the system hangs during the Windows 7 boot

  - by user24247

  My desktop computer (1 OS, 1 drive, 1 partition) hangs during the Windows 7 boot process. When selecting F8 I can select Safe Boot which allows me to see the files processed during the boot process. I know that the last line displayed is the last file that was SUCCESFULLY loaded. How do I find out what the next line, and the potential candidate driver/file/program would have been? The unusual thing, at least in my experience, is that the freezing up of the system also happens when I boot from the Windows 7 install disks, which is preventing me from any repair options. With a failure of both, I cannot not restore Windows 7 to a previous date or uninstall drivers/programs that may be the cause of the hanging. Thanks for your responses. Marc

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• Decompressing Files on an NTFS Volume from Linux

  - by amphetamachine

  I recently did something stupid on my dual-boot laptop, where I compressed the entire volume to make room for a Linux partition. For some reason, Windows let me compress C:\ntldr. Now I need to get it uncompressed in order for Windows to boot. Here are some of the operating restrictions I have: I do not have access to the BIOS. I cannot boot from CD/USB/floppy. (I installed Linux through PXE) It does not have network access. Is there were some way to specify that the ntfs-3g driver shouldn't compress files even if it thinks it should (if the directory is compressed) when mounting the volume? Or, is there a way to modify the attributes of a directory using ntfstools?

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• View hidden contents of usb device

  - by Srikanth Suresh

  I have a USB with the following contents on ls -lah total 8.0K drwx------ 1 srikanth srikanth 4.0K May 27 22:54 . drwxr-xr-x 4 root root 4.0K May 28 19:37 .. -rw------- 2 srikanth srikanth 0 May 27 22:52 Files.az3w On viewing the properties of the folder I have the following information: 90.4Mb used and 16.1GB free There is data in this pen drive which I am currently unable to view also it is sensitive. After searching about hiding contents in a USB I think that there is a hidden partition here that I cant access. How should I proceed to view the contents without damaging the files already present?

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