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How To Recover Superblock In Linux


Thanks for your suggestions! The dd command you've given restores the secondary superblock but apparently it's corrupt as well. You need to locate only one good copy of the superblock to copy it over. Cesar Delgado replied Nov 13, 2010 Hi Did you solve the problem ? http://webjak.net/unable-to/unable-to-read-either-superblock.html

Take backup of file systems to tape updated Nov 18, 2010 by Sam Nicholson | Replies (5) The only command you need for your system is mksysb and savevg (with options). The logform command should only be run on CLOSED logical volumes. http://aix4admins.blogspot.ca/2011/05/superblock-in-jfs-superblock-is-first.html might help OP as it gives some hints on what to do, but step 1 is definitely getting the VG up and running. Shutdown and reboot with the key in normal: sync;sync;sync;shutdown -Fr You can also run fsck on any user-created file systems in rootvg, if needed.

How To Recover Superblock In Linux

Correcting Primary File Systems and Log It is not possible under normal circumstances to unmount /, /usr, /tmp, and /var, and thus close /dev/hd8 (the primary rootvg log device) so they You cannot dynamically reduce the size of a snapshot LV.# snapshot -o size=+1 /dev/fslv08 Snapshot /dev/fslv08 size is now 524288 512-blocks. # snapshot -o size=-1 /dev/fslv08 snapshot: 0507-562 Cannot reduce the http://jfsrec.sourceforge.net/ permalinkembedsavegive goldaboutblogaboutsource codeadvertisejobshelpsite rulesFAQwikireddiquettetransparencycontact usapps & toolsReddit for iPhoneReddit for Androidmobile websitebuttons<3reddit goldredditgiftsUse of this site constitutes acceptance of our User Agreement and Privacy Policy (updated). © 2016 reddit inc.

Link to utility Its most likely toast if the superblock + journal are bad. Had I known, I would have suggested you import it with alt_rootvg_op so you wouldn't mess up the mountpoints and VGDA. You can perform the snapshot operation on a live file system, as it will automatically freeze I/O operations while the image is taken. Imfs: Warning: mount point /usr already exists in /etc/filesystems.

regards, Johan Top This thread has been closed due to inactivity. Bad Magic Number In Superblock And another thing: have you issued this command exactly as you have written: Code: lquerypv -h /dev/hdx 1000 100 ?? thanks 24 commentsshareall 24 commentssorted by: besttopnewcontroversialoldrandomq&alive (beta)[–]DopGanger 2 points3 points4 points 3 years ago(6 children)Use lspv to check the PV is actually being recognised by the system. If the original file system is running out of space, you may need to remove any unnecessary snapshots or files.

If fsck cannot read a block due to a missing disk, for example, it will ask to clear the block. You may need to briefly quiesce an application for the (very short) duration of the snapshot process. Companies Vision Solutions Toolbox for IT My Home Topics People Companies Jobs White Paper Library Collaboration Tools Discussion Groups Blogs Follow Toolbox.com Toolbox for IT on Twitter Toolbox.com on Twitter Toolbox.com The current volume is: /dev/cglv Primary superblock is valid. *** Phase 1 - Initial inode scan *** Phase 2 - Process remaining directories *** Phase 3 - Process remaining files ***

Bad Magic Number In Superblock

run fsck -y /dev/fslv04 and then mounted the fslv04 to /test. does anyone have any ideas? How To Recover Superblock In Linux just need to chug along. RudiC View Public Profile Find all posts by RudiC #4 11-13-2014 thorin666 Registered User Join Date: Nov 2014 Last Activity: 14 March 2015, 5:33 AM EDT Posts: 6

This is no different than if you were to use a similar copy service tool such as IBM's Flashcopy on the DS8000.A snapshot maps its contents to the contents of the this contact form In an effort to reduce spam, accounts less than 24 hours old will be unable to post to /r/sysadmin. You can find out more about these and other JFS2 snapshot uses in the links provided under the Resources section. Accidentally running this on a file system completely destroys all file system data.

In this directory, I find another directory named cgsnap1, my snapshot name.# cd /cg/.snapshot # pwd /cg/.snapshot # ls -ltr total 0 drwxr-xr-x 3 root system 256 Feb 10 19:55 cgsnap1I Fixes for the fsck and logform commands About the fsck and logform commands The fsck command is used to detect and repair inconsistencies in the journaled file system (JFS) and the I think we were quoted $1500 for 8 cores and $1k/year maintenance. have a peek here These data file systems that you are having trouble with are two different file systems like the Windows operating systems which there are different file systems between Windows 95 and Windows

If you had intended to mount up root disks from another LPAR and extract data -- for example the other LPAR is down hard or you migrated from it, but you I'm probably going to have to recreate the filesystems and restore from backup (ironic for a TSM server). S data replied Jul 12, 2012 Thanks to all problem has been rectified.

AIX TSM VG - Unable to read either superblock updated Nov 15, 2010 by live_ | Replies (5) Hi everyone, Just has an issue on the san and now the TSM

I/O is frozen to provide a greater level of file system consistency in the image. As the superblock is primarily residing on the hard drive(s), I would think of that as the first problem, but in the case where you say both the pri and sec Participate in the AIX and UNIX® forums: AIX ForumAIX Forum for developersCluster Systems ManagementIBM Support Assistant ForumPerformance Tools ForumVirtualization ForumMore AIX and UNIX Forums Comments Close [x] developerWorks: Sign in Required Tetsuo Ito replied Jul 12, 2012 Hello.

Business VoIP Comparison Guide MoreWhitePapers Best Answer 0 Mark this reply as the best answer?(Choose carefully, this can't be changed) Yes | No Saving... These are my... permalinkembedsaveparentgive gold[–]DopGanger 0 points1 point2 points 3 years ago(0 children)Fair enough! Check This Out I resend it: Sometimes we can recover the superblock from a secondary backup copy stored further on down the file system.

Filesystem MB blocks Free %Used Iused %Iused Mounted on /dev/cglv 128.00 127.61 1% 6 1% /cgBack to topSummaryJFS2 snapshots are another utility you can deploy alongside other backup tools in your The second type allocates space out of the original file system, this is known as an internal snapshot.An external snapshot can be mounted separately on its own mount point. bosboot verification error installing maintenance updated Nov 12, 2010 by live_ | Replies (2) Very similar to Jake from my own notes: To force the upgrade through you can #hash out Unknown root password, cannot get into System Management Services updated Dec 8, 2010 by nsampatreddy | Replies (11) I don't know if it will help but the panel will display E1F1

Top Best Answer 0 Mark this reply as the best answer?(Choose carefully, this can't be changed) Yes | No Saving... Please choose a display name between 3-31 characters. This can only be done in maintenance mode. 1.Boot the machine into maintenance mode, access the rootvg volume group, and start a shell prior to mounting the file systems. My AccountSearchMapsYouTubePlayNewsGmailDriveCalendarGoogle+TranslatePhotosMoreShoppingWalletFinanceDocsBooksBloggerContactsHangoutsEven more from GoogleSign inHidden fieldsSearch for groups or messages jump to contentmy subredditsAllsvenskanannouncementsArtAskRedditaskscienceawwblogbookscreepydataisbeautifulDIYDocumentariesEarthPorneuropeexplainlikeimfivefoodfunnyFuturologygadgetsgamingGetMotivatedgifshistoryIAmAInternetIsBeautifulintresseklubbenJokesLifeProTipslistentothismildlyinterestingmoviesMusicnewsnosleepnottheonionOldSchoolCoolpersonalfinancephilosophyphotoshopbattlespicsscienceShowerthoughtsspacespopsportssvenskpolitikSWARJEswedenswedishproblemstelevisiontifutodayilearnedTwoXChromosomesUpliftingNewsvideosworldnewsWritingPromptsedit subscriptionsfront-all-random|AskReddit-funny-pics-worldnews-videos-news-gifs-aww-gaming-todayilearned-movies-Showerthoughts-mildlyinteresting-IAmA-television-Jokes-TwoXChromosomes-europe-tifu-nottheonion-explainlikeimfive-dataisbeautiful-sports-space-LifeProTips-OldSchoolCool-science-Art-UpliftingNews-books-Futurology-Music-photoshopbattles-food-personalfinance-WritingPrompts-DIY-creepy-Documentaries-nosleep-EarthPorn-GetMotivated-askscience-gadgets-sweden-history-InternetIsBeautiful-philosophy-listentothis-svenskpolitik-swedishproblems-announcements-SWARJE-blog-Allsvenskan-spop-intresseklubbenmore »sysadmincommentsWant to join? Log in or sign up in seconds.|Englishlimit my search to /r/sysadminuse the following search

Attempts by users to write to the file system while mounted may cause fsck to report corruption that does not exist. This space is used if a block in the original file system changes. Post that instead of "didn't work" which can mean anything and then some. Either way, if the superblock is toast and it can't be forced through any of the known repair utils it sounds like a dead volume.

Further access to the internal snapshots will fail. superblock corruption ls: 0653-341 The file xxx does not exist, but it exist LPAR won't boot due to FSCK issue While fsck i will get some error in aix fsck means This is because all the modified blocks from the source have been copied to the disk in the internal snapshot. Attempts by users to write to the file system might cause fsck to report corruption that does not exist.

Display name:*(Must be between 3 – 31 characters.) By clicking Submit, you agree to the developerWorks terms of use. Detail Data Snapshot Major/Minor device number 000A 0016 Snapshot generation number 0000 0004 FILE SYSTEM DEVICE AND MOUNT POINT /dev/cglv, /cgInternal snapshots are not separately mountable.Internal snapshots are not compatible with Toolbox.com is not affiliated with or endorsed by any company listed at this site. support is from helpful sysadmins like you and the internet hahaha.

This document applies to AIX Versions 4 and 5. It is likely to use LVM, you can't read it straight permalinkembedsavegive gold[–]kelcya[S] 0 points1 point2 points 3 years ago(0 children)importvg worked!