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• How to remove bad disk from LVM2 with the less data loss on other PVs?

  - by Walkman

  I had a LVM2 volume with two disks. The larger disk became corrupt, so I cant pvmove. What is the best way to remove it from the group to save the most data from the other disk? Here is my pvdisplay output: Couldn't find device with uuid WWeM0m-MLX2-o0da-tf7q-fJJu-eiGl-e7UmM3. --- Physical volume --- PV Name unknown device VG Name media PV Size 1,82 TiB / not usable 1,05 MiB Allocatable yes (but full) PE Size 4,00 MiB Total PE 476932 Free PE 0 Allocated PE 476932 PV UUID WWeM0m-MLX2-o0da-tf7q-fJJu-eiGl-e7UmM3 --- Physical volume --- PV Name /dev/sdb1 VG Name media PV Size 931,51 GiB / not usable 3,19 MiB Allocatable yes (but full) PE Size 4,00 MiB Total PE 238466 Free PE 0 Allocated PE 238466 PV UUID oUhOcR-uYjc-rNTv-LNBm-Z9VY-TJJ5-SYezce So I want to remove the unknown device (not present in the system). Is it possible to do this without a new disk ? The filesystem is ext4.

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• Adobe software does not save to network share

  - by Bart van Heukelom

  I'm running Windows 7 inside virtualbox on a linux host. I have shared my linux filesystem so it's accesible in Windows under \vboxsvr\sharename. I've mounted this share on S:. For most software, it works fine. Adobe software like Photoshop has problems with it though. I can read from S: just fine, but if I try to save something it gives me the message "There are no more files". How can I make it able to write to the share?

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• My computer won't go into standby or hibernate

  - by Thomas B.

  Hi. I have a problem that I first noticed yesterday. Whenever I would press the half moon standby button on my keyboard, my computer would go to sleep. I also have a shortcut on my desktop configured to put my computer into hibernate. But now whenever I try to put my pc in sleep or hibernate mode, my monitor goes black for a few seconds but then comes back on at the login screen. I haven't installed or changed anything other than create a couple logical partitions in the hfs+ filesystem. (still in the process of trying to triple-boot) Any help would be great, but for now I'm going to bed. Will check back in the morning.

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• Why can I not access any file or directory created by PHP from FTP-client?

  - by user43053

  Hello there, If I create a directory with mkdir(), or create a file with fopen(), file_put_contents() or SimpleXMLElement::asXML(), I am unable to access the file with my FTP-client or c-Panel File Manager. If I try to delete or edit them, I get errors. Dreamweaver suggests it is a permission problem or a network or filesystem fault (but I've set the permissions with chmod() to 0777, and when I check the cPanel, it confirms chmod 777. I also tried to use fileowner() and the function returns int(99), the same owner as those files that I could access with my FTP-client. It seems files and directories created with PHP can only be modified or be deleted with PHP. I thought this must be a server setup related issue, so I write it here. I am on a shared server, and I have no idea about setting up servers. Thank you for your time. Kind regards Marius

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• Recurring Apache 2.0.52 error on CentOS 4 - 'could not create `rewrite_log_lock`'

  - by warren

  I have been seeing a recurring issue on my web server: [Sun May 16 03:10:19 2010] [crit] (28)No space left on device: mod_rewrite: could not create rewrite_log_lock Configuration Failed [Sun May 16 04:10:05 2010] [crit] (28)No space left on device: mod_rewrite: could not create rewrite_log_lock Configuration Failed [Sun May 16 05:10:04 2010] [crit] (28)No space left on device: mod_rewrite: could not create rewrite_log_lock Configuration Failed [Sun May 16 05:17:13 2010] [crit] (28)No space left on device: mod_rewrite: could not create rewrite_log_lock Configuration Failed So far, the only fix I have found to this when it happens is to reboot my server. This is non-ideal :-\ Restarting httpd does not clear the error. df indicates I have 20+ gigs free, and top and free both report 800+ megs (or 1.2 gigs) > df -h Filesystem Size Used Avail Use% Mounted on /dev/simfs 40G 18G 23G 44% / # > free total used free shared buffers cached Mem: 1474560 300832 1173728 0 0 0 -/+ buffers/cache: 300832 1173728 Any ideas on why this would recur, and how to prevent/fix it?

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• Debian crashed, file system is read-only and cannot backup - How Do I find/mount a USB drive?

  - by Spiros

  We have a Debian server (vm's) here at work and the server crashed after a power failure. I can only boot the system in maintenance mode, and the whole file system is set to read only. I can run fsck though maintenance mode, however I would like to get a backup of some files before I do. Problem: I cannot access the net since there is no network connectivity in maintenance mode, and for some reason I try to add a USB flash drive to the computer but I can't find it through the console. Question: how to you find/mount a usb drive on Debian? I have tried several resources from the internet but nothing worked. Is there any other way I could get a backup of my files? I cannot start networking since the filesystem is set to read only. Any help would be appreciated.

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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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• FreeBSD 9 (amd64) reboot/shutdown process is very slow

  - by nbari

  I have a Dell Poweredge 2900 III with FreeBSD 9 (amd64), the server uses mfi wich handles a raid10, I had to reboot the server, but notice that either when rebooting or shutting down the server, something is going wrong, besides taking to much time to reboot/shutdown, after rebooting I notice that that some ldap instances within some jails could'nt start and this was because the database was corrupted. This make me think that probably something was wrong with the disks or mfi card, but checking the disk array / logs everything seems to be working fine. My set up is something like this: Host server has the minimum base of FreeBSD 9 amd64, within I create some jails, the ones contain services like mysql, email, and some others ldap. With FreeBSD 7 and 8 I didn't notice this behavior but with FreeBSD 9 something is not working well. I did a clean installation of FreeBSD 9 and root filesystem is using ZFS. Attached is an image hoping some one can give me a hint of what to check or any kind of advice. reboot capture screen image

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• Oracle application - files missing in the Mount point in UNix server

  - by arun_V

  My oracle application test instance is down, When I browse through the Unix server, I couldn’t find any files in the mount point,U01 U06 or U10, when I put BDF command it shows the following $ bdf Filesystem kbytes used avail %used Mounted on /dev/vg00/lvol3 204800 35571 158662 18% / /dev/vg00/lvol1 299157 38506 230735 14% /stand /dev/vg00/lvol8 1392640 1261068 123620 91% /var /dev/vg00/lvol7 1327104 825170 470631 64% /usr /dev/vg00/lvol4 716800 385891 310746 55% /tmp /dev/vg00/lvol6 872448 814943 53936 94% /opt /dev/vg00/lvolssh 32768 13243 18306 42% /opt/openssh /dev/vg00/lvol5 204800 187397 16334 92% /home /dev/vg00/lvolback 512000 472879 36704 93% /backup dg-ora04:/dgora03_u10 204800 167088 35416 83% /u10 dg-ora04:/dgora03_u06 204800 167088 35416 83% /u06 dg-ora04:/dgora03_u01 204800 167088 35416 83% /u01 Why can't I see any files inside the mount points?

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• rsync to ONLY keep files in destination that have been removed from source

  - by David Corley

  We use rsync to copy filesystem contents from one machine to another as a backup. We first run MACHINE-X-MACHINE-Y rsync for a straight backup with the --delete and --delete-excluded switches We also run an internal Rsync between the MACHINE-Y destination, and another folder on MACHINE-Y with either of the delete flags. This maintains a non-destructive copy in the event someone inadvertently deletes a file on MACHINE-X. However, it also has the overhead of being a complete copy of what has already been synchronized. Ideally I want to be able to run the non-destructive rsync in such a way that the destination ONLY receives the deleted files and so avoids unnecessary duplication . Is there any way to do this?

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• How can I see the metadata of an ISO file?

  - by netvope

  I have been searching for the list of metadata field of an ISO file on Google but couldn't find anything. That made me think that there isn't any metadata in an ISO file, just the files content and their properties. However, today I find in ImgBurn that there is a field called Imp ID, which typically contains the software used to create the ISO file. I'm not sure if it is specific to the UDF and/or CDFS filesystem. What are the other possible metadata fields in an ISO file? What software may I use to see them?

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• Post raid5 setup reboot shows single hard drive failure on ubuntu 12.10?

  - by junkie

  I just set up raid 5 on linux using three HDDs as per a guide. It all went fine until when I rebooted I got the following text: http://i.stack.imgur.com/Zsfjk.jpg. Does this mean one of my HDDs has failed? How do I check if any of them are failing? I tried using smartctl and didn't see any issues. Or is it nothing to do with failure and something else altogether? I would like to get the raid 5 working again but I'm not sure where to go from here. I'm using ubuntu 12.10 and the three raid disks each have a gpt partition with a single full size partition of filesystem type ext4. Note I only got an error on reboot not while I was creating the raid array which went fine. Thanks.

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• How does the process of disk partitioning actually work on most HDD's?

  - by Dark Templar

  From what I know of most laptops, you are able to "partition" your disk into as many other drives as you please. The more you cut it up, the smaller your partitions are, but from an organizational point of view, this may be desirable... I was wondering how the filesystem itself becomes partitioned underneath the partitions visible to the user. For instance, a laptop disk is usually divided into platters, each with two surfaces. The surfaces are further divided into "tracks". I guess what I am asking is, is it possible to identify how the disk itself keeps track of partitions? (whether each partition has its own platter? each partition has its own set of adjacent tracks? or some other configuration, or whether the data from different partitions are just randomly interleaved and scattered throughout the disk?)

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• MySQL ERROR 1045 Access Denied

  - by winarm

  Hello- I recently installed MySQL on Fedora13. Now, when I try to create a database, it denies me access. I tried resetting the password and it does not recognize my system root. I tried resetting password with an init-file containing: UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root'; FLUSH PRIVILEGES; I tried uninstall and then reinstall and it is still not working. I am new to Linux and not comfortable with the filesystem. Talk to me like I'm four. Thank you, kindly.

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• Should I format USB sticks and SD cards to FAT, FAT32, exFAT or NTFS? (Windows files, live Linux distors)

  - by superuser

  Does it depend on the media size which one to chose or on some other parameters? In Windows 7 FAT16 is the default. In pendrivelinux.com's Universal USB Installer FAT32. Which one to chose? How about NTFS for Windows use? How about exFAT? It is tne Microsoft designed filesystem for removable media. Is there a difference in USB sticks and SD cards in this regard? Edit: seeing developments in the other thread, should I still use something like exFAT if I don't want Recycle bins created on every single machine I plug my USB thumb drive in?

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• Transparently decompressing data in archive to allow greater compression later

  - by Vi.

  I have, for example, filesystem image which have some compressed files (with weak compression such as gzip), for example, manpages or archives with the same uncompressed content nearby. How to pre-filter the data to "expand" compressed data to plain form (to re-compress it with strong compression) and then post-filter after decompression to restore original "semi-compressed" image? SHA-1 match is advices but not strictly required (but the resulting image must work, e.g. re-compressed files should not grow too much, be decompressible etc.) Like improving compression ratio by reversing weak compression algorithms. Are there programs for this?

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• how to stop powershell mangling command line options for program executed from shell?

  - by kem

  From the powershell prompt, when I try to run a program and feed it a command line option, powershell ends up mangling the option. Why does this happen? Is there any way to stop it besides enclosing the option in quotes? For example, from the powershell prompt: PS Microsoft.PowerShell.Core\FileSystem::\\mach\share .\myprog.exe -file=input.txt myprog.exe ends up getting two arguments: 1) -file=input 2) .txt I need to run it like: .\myprog.exe "-file=input.txt" or .\myprog.exe '-file=input.txt' to force it to be one argument. No other shell does this.

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• Unauthorized access error to html pages in IIS 7.0

  - by George2

  I am using VSTS 2008 + C# + .Net 3.5 + IIS 7.0. I have created a new web site and put an html file into the directory. And when I use browse function in IIS manager to browse the html file, I met with the following error, any ideas what is wrong? BTW: I am very confused about unauthorized error since I run the worker process under administrator account. From the error message, I am confused why the logon method is anonymous and not using administrator account? HTTP Error 401.3 - Unauthorized You do not have permission to view this directory or page because of the access control list (ACL) configuration or encryption settings for this resource on the Web server. Module IIS Web Core Notification AuthenticateRequest Handler StaticFile Error Code 0x80070005 Requested URL http://localhost:80/a.html Physical Path C:\test\simplehosttest\a.html Logon Method Anonymous Logon User Anonymous thanks in advance, George

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• Backlight dimming don't work

  - by Mathias

  My Packard Bell EasyNote TS11HR notebook does not have an option for dimming the display backlight. At night, my eyes begin to hurt because of the strong light from the screen. My laptop is 2-3 months old and I am sure it has worked before. When I click on the battery icon in the notification area, it says in my language (Danish): "the setting for light does possibly reduce the life of the battery". However, I cannot dim the backlight. I have tried downloading programs for dimming the screen but they only make the screen darker, instead of dimming the backlight. I have tried updating my drivers and looking in the BIOS for a setting. I also plan to use an Ubuntu LiveCD to try controlling it. As of now though, the backlight is locked at maximum. Any ideas?

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• Setting up Amazon Cloudwatch to get an alert when you server is down

  - by Saif Bechan

  I have an instance running on Amazon EC2 that I turned into a webserver. Now I have been looking at cloudwatch, but I do not know if it is the correct tool for the job. Basically I want to get informed when the server is down, for whatever reason. Maybe the server got hacked, or the server shut down for whatever reason, I want to get a notification on that. I have enabled clouwatch, and tried to set up a alert, but I only see things like network in-out or cpu usage, an d metrix. Now I do not know if these will do the trick.

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• Hiding a directory through the FAT table

  - by hennobal

  I've looked into the FAT file system, trying to find a way to make a directory hidden from view of the user. This has been done with malware previously, so it should be possible. The SpyEye trojan hid inside a directory C:\cleansweep.exe\ which was only reachable through the command line. I know deletion is possible by substituting the first character of the directory in the FAT table with 0xE5, but then it will not be accessible. Any ideas on how the scenario from SpyEye can be recreated? Any filesystem is interesting, but ideally FAT or NTFS.

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• Creating disk snapshots in Windows 7

  - by Puneet Arora

  Does anyone know of a command or tool to create disk snapshots on Windows 7 (client SKU)? I see vssadmin.exe has a "create shadow" option, but that's available only on server SKUs: http://technet.microsoft.com/en-us/library/cc788055(v=ws.10).aspx I've a backup tool that replicates changes (creations, modifications and deletions to files and directories) since last backup, to my backup volume. Before each time this happens I want to create a persistent snapshot on my backup volume. I could then mount previous snapshots to view previous backups achieving a behavior similar to that of TimeMachine in OS X. This question has been asked before but unfortunately there weren't any good answers: Taking snapshots of filesystem/volume in Windows 7?

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• Config deployment on multiple servers.

  - by user66601

  I have multiple servers in WEB cluster (identical configuration for all of them, despite the IP) How do you deploy changes in configs on multile servers? I make the new config, then create config per every server (placing correct IP), and next: upload them on every server, replacing old ones (rsync over ssh) set on every server a job which reloads webserver at the same time (servers use ntp). - this done by issuing commands by script (to save time for logging in) before adding a job for server reload - there's checksum test of the config on the server) - an a notification in case of fail How do you see such method? What should be the "professional way :) ? (I don't say my way doesn't work... it works and saves my time not used for logging on every webserver.) Regards,

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• stat and ls show wrong file size (terabytes wrong)

  - by WolleTD

  Ok, I have a bunch of vCard files, all about 200 to 300 Bytes in size. While trying to get them archived, I wondered why that takes so long and discovered that there is one file with a wrong size. Both ls and stat are showing a size of about 8.1 Terabytes. That's amazing because my SSD is only about 250 Gigabytes in size. There are some other files with wrong sizes, too, but this is clearly the biggest one. I already gave it a fsck, but there seem to be no errors in the (ext4) filesystem. How can I get rid of this wrong size? Thanks, Wolle

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• After upgrade to Windows 8.1, no Skydrive icon in task bar

  - by Jeremy Butler

  I upgraded to 8.1 and now I don't see the SkyDrive icon in the task bar, nor the green light under it indicating the my computer is communicating with SkyDrive. When I go into Control Panel |..|Notification Area Icons, SkyDrive is listed and noted as Up to date. However even though I mark it to Show Icons and Notifications I don't see any icon in the taskbar. Is it supposed to be this way, or do I have a problem? I kind of got used to that little green synchronizing indicator giving me a warm and fuzzy feeling.

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