." Text automatically generated by txt2man cache_check - Online Linux Manual PageSection : 8
Updated : Device Mapper Tools
Source : System Manager's Manual

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NAMEcache_check - validates cache metadata on a device or file.

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SYNOPSIS.fam C cache_check [options] {device|file} .fam T

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DESCRIPTIONcache_check checks cache metadata created by the device-mapper cache target on a device or file. This tool cannot be run on live metadata.

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OPTIONS-h, --help  Print help and exit. -V, --version  Output version information and exit. -q, --quiet  Suppress output messages, return only exit code. --super-block-only  Only check the superblock. --skip-hints  Skip checking of the policy hint values metadata. --skip-discards  Skip checking of the discard bits in the metadata. --clear-needs-check-flag  Clears the 'needs_check' flag in the superblock. .fam C The kernel may set a flag to force the pool to be checked before it's next activated. Set this switch to clear the flag if the check is successful. If the metadata check failed, the flag is not cleared and a cache_repair run is needed to fix any issues. After cache_repair succeeded, you may run cache_check again. .fam T

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EXAMPLEAnalyses and repairs cache metadata on logical volume /dev/vg/metadata: .fam C $ cache_check /dev/vg/metadata .fam TThe device may not be actively used by the target when running.

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DIAGNOSTICScache_check returns an exit code of 0 for success or 1 for error.

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SEE ALSOcache_dump(8), cache_repair(8), cache_restore(8)

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AUTHORJoe Thornber <ejt@redhat.com>, Heinz Mauelshagen <HeinzM@RedHat.com> 0

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Johanes Gumabo

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