thin-provisioning-tools/man8/thin_check.8

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.TH THIN_REPAIR 8 "Thin Provisioning Tools" "Red Hat, Inc." \" -*- nroff -*-
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.SH NAME
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thin_check \- repair thin provisioning metadata on device or file
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.SH SYNOPSIS
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.B thin_check
.RB [ options ]
.I {device|file}
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.SH DESCRIPTION
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.B thin_check
checks thin provisioning metadata created by
the device-mapper thin provisioning target on a
.I device
or
.I file.
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.SH OPTIONS
.IP "\fB\-q, \-\-quiet\fP"
Suppress output messages, return only exit code.
.IP "\fB\-h, \-\-help\fP"
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Print help and exit.
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.IP "\fB\-V, \-\-version\fP"
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Output version information and exit.
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.IP "\fB\-\-super\-block\-only\fP"
Only check the superblock is present.
.IP "\fB\-\-skip-mappings\fP"
Skip checking of the block mappings which make up the bulk of the
metadata.
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.IP "\fB\-\-ignore\-non\-fatal\-errors\fP"
.B thin_check
will only return a non-zero exit code if it finds a fatal
error. An example of a on fatal error is an incorrect data block
reference count causing a block to be considered allocated when it in
fact isn't. Ignoring errors for a long time is not advised, you
really should be using thin_repair to fix them.
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.SH EXAMPLE
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Analyses and repairs thin provisioning metadata on logical volume
/dev/vg/metadata:
.sp
.B thin_check /dev/vg/metadata
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The device may not be actively used by the target
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when running.
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.SH DIAGNOSTICS
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.B thin_check
returns an exit code of 0 for success or 1 for error.
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.SH SEE ALSO
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.B thin_dump(8)
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.B thin_repair(8)
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.B thin_restore(8)
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.B thin_rmap(8)
.B thin_metadata_size(8)
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.SH AUTHOR
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Joe Thornber <ejt@redhat.com>
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.br
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Heinz Mauelshagen <HeinzM@RedHat.com>