1NDCTL-CHECK-NAMESP(1)            ndctl Manual            NDCTL-CHECK-NAMESP(1)
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NAME

6       ndctl-check-namespace - check namespace metadata consistency
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SYNOPSIS

9       ndctl check-namespace <namespace> [<options>]
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DESCRIPTION

12       A namespace in the sector mode will have metadata on it to describe the
13       kernel BTT (Block Translation Table). The check-namespace command can
14       be used to check the consistency of this metadata, and optionally, also
15       attempt to repair it, if it has enough information to do so.
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17       The namespace being checked has to be disabled before initiating a
18       check on it as a precautionary measure. The --force option can override
19       this.
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EXAMPLES

22       Check a namespace (only report errors)
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24           ndctl disable-namespace namespace0.0
25           ndctl check-namespace namespace0.0
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27       Check a namespace, and perform repairs if possible
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29           ndctl disable-namespace namespace0.0
30           ndctl check-namespace --repair namespace0.0
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OPTIONS

33       -R, --repair
34           Perform metadata repairs if possible. Without this option, the raw
35           namespace contents will not be touched.
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37       -L, --rewrite-log
38           Regenerate the BTT log and write it to media. This can be used to
39           convert from the old (pre 4.15) padding format that was
40           incompatible with other BTT implementations to the updated format.
41           This requires the --repair option to be provided.
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43               WARNING: Do not interrupt this operation as it can potentially cause
44               unrecoverable metadata corruption. It is highly recommended to create
45               a backup of the raw namespace before attempting this.
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47       -f, --force
48           Unless this option is specified, a check-namespace operation will
49           fail if the namespace is presently active. Specifying --force
50           causes the namespace to be disabled before checking.
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52       -v, --verbose
53           Emit debug messages for the namespace check process.
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55       -r, --region=
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58               A 'regionX' device name, or a region id number. The keyword 'all' can
59               be specified to carry out the operation on every region in the system,
60               optionally filtered by bus id (see --bus= option).
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62       -b, --bus=
63           Enforce that the operation only be carried on devices that are
64           attached to the given bus. Where bus can be a provider name or a
65           bus id number.
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68       Copyright (c) 2016 - 2018, Intel Corporation. License GPLv2: GNU GPL
69       version 2 http://gnu.org/licenses/gpl.html. This is free software: you
70       are free to change and redistribute it. There is NO WARRANTY, to the
71       extent permitted by law.
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SEE ALSO

74       ndctl-disable-namespace(1), ndctl-enable-namespace(1), UEFI NVDIMM
75       Label Protocol[1]
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NOTES

78        1. UEFI NVDIMM Label Protocol
79           http://www.uefi.org/sites/default/files/resources/UEFI_Spec_2_7.pdf
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83ndctl 62                          05/11/2019             NDCTL-CHECK-NAMESP(1)
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