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Handling File System Errors: Difference between revisions

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From time to time, usually due to catastrophic disk / RAID failures, it may be necessary to repair the backing file system of an OST or MDT to correct file system errors.  This is done using a special version of the ''e2fsck'' tool. It may also be useful to run ''lfsck'' in such cases.  This is a Lustre™-specific tool that checks the coherency of a running Lustre filesystem as a whole.
<small>''(Updated: Mar 2010)''</small>


For information on the following topics, see [[Fsck Support]].
From time to time, usually due to catastrophic disk / RAID failures, it may be necessary to repair the backing file system of an OST or MDT to correct file system errors.  This is done using a special version of the ''e2fsck'' tool. In such cases, it may also be useful to run ''lfsck'', a Lustre™-specific ''fsck'' tool that checks the coherency of a running Lustre file system as a whole.  


* Obtaining e2fsck support for Lustre  
A Lustre-specific version of ''e2fsprogs'' can be found at [http://downloads.lustre.org/public/tools/e2fsprogs/ http://downloads.lustre.org/public/tools/e2fsprogs/]. A quilt patchset of all changes to the vanilla e2fsprogs is available in ''e2fsprogs-{version}-patches.tgz''.
* Using e2fsck on a backing filesystem
* Running e2fsck+lfsck on a corrupted Lustre filesystem


For more information about ''lfsck'', see [http://wiki.lustre.org/manual/LustreManual18_HTML/UserUtilitiesMan1_HTML.html#50532398_pgfId-1292867 Section 27.2: ''lfsck''] in the [[Lustre Documentation|''Lustre Operations Manual'']].
For information about:
 
* Using e2fsck on a backing file system, see [http://wiki.lustre.org/manual/LustreManual20_HTML/TroubleShootingRecovery.html#50438225_pgfId-1292068 Section 27.1: ''Recovering from Errors or Corruption on a Backing File System''] in the [http://wiki.lustre.org/manual/LustreManual20_HTML/index.html ''Lustre Operations Manual''].
* Running e2fsck+lfsck on a corrupted Lustre file system, see [http://wiki.lustre.org/manual/LustreManual20_HTML/TroubleShootingRecovery.html#50438225_pgfId-1291230 Section 27.2: ''Recovering from Corruption in the Lustre File System''] in the [http://wiki.lustre.org/manual/LustreManual20_HTML/index.html ''Lustre Operations Manual''].
* Addressing orphaned objects, see [http://wiki.lustre.org/manual/LustreManual20_HTML/TroubleShootingRecovery.html#50438225_pgfId-1290574 Section 27.2.1: ''Working with Orphaned Objects''] in the [http://wiki.lustre.org/manual/LustreManual20_HTML/index.html ''Lustre Operations Manual''].
 
For more information about ''lfsck'', see [http://wiki.lustre.org/manual/LustreManual20_HTML/UserUtilities_HTML.html#50438206_pgfId-1305844 Section 32.3: ''lfsck''] in the [http://wiki.lustre.org/manual/LustreManual20_HTML/index.html ''Lustre Operations Manual''].

Latest revision as of 06:06, 20 January 2011

(Updated: Mar 2010)

From time to time, usually due to catastrophic disk / RAID failures, it may be necessary to repair the backing file system of an OST or MDT to correct file system errors. This is done using a special version of the e2fsck tool. In such cases, it may also be useful to run lfsck, a Lustre™-specific fsck tool that checks the coherency of a running Lustre file system as a whole.

A Lustre-specific version of e2fsprogs can be found at http://downloads.lustre.org/public/tools/e2fsprogs/. A quilt patchset of all changes to the vanilla e2fsprogs is available in e2fsprogs-{version}-patches.tgz.

For information about:

For more information about lfsck, see Section 32.3: lfsck in the Lustre Operations Manual.

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