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83 lines
3.8 KiB
Plaintext
83 lines
3.8 KiB
Plaintext
.SH NOTES
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.
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The lv_attr bits are:
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.IP 1 3
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Volume type: (C)ache, (m)irrored, (M)irrored without initial sync, (o)rigin,
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(O)rigin with merging snapshot, (r)aid, (R)aid without initial sync,
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(s)napshot, merging (S)napshot, (p)vmove, (v)irtual,
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mirror or raid (i)mage, mirror or raid (I)mage out-of-sync, mirror (l)og device,
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under (c)onversion, thin (V)olume, (t)hin pool, (T)hin pool data,
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v(d)o pool, v(D)o pool data,
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raid or pool m(e)tadata or pool metadata spare.
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.IP 2 3
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Permissions: (w)riteable, (r)ead-only, (R)ead-only activation of non-read-only
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volume
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.IP 3 3
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Allocation policy: (a)nywhere, (c)ontiguous, (i)nherited, c(l)ing, (n)ormal
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This is capitalised if the volume is currently locked against allocation
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changes, for example during
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.BR pvmove (8).
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.IP 4 3
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fixed (m)inor
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.IP 5 3
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State: (a)ctive, (h)istorical, (s)uspended, (I)nvalid snapshot,
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invalid (S)uspended snapshot, snapshot (m)erge failed,
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suspended snapshot (M)erge failed, mapped (d)evice present without tables,
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mapped device present with (i)nactive table, thin-pool (c)heck needed,
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suspended thin-pool (C)heck needed, (X) unknown
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.IP 6 3
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device (o)pen, (X) unknown
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.IP 7 3
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Target type: (C)ache, (m)irror, (r)aid, (s)napshot, (t)hin, (u)nknown, (v)irtual.
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This groups logical volumes related to the same kernel target together. So,
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for example, mirror images, mirror logs as well as mirrors themselves appear as
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(m) if they use the original device-mapper mirror kernel driver; whereas the raid
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equivalents using the md raid kernel driver all appear as (r).
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Snapshots using the original device-mapper driver appear as (s); whereas
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snapshots of thin volumes using the new thin provisioning driver appear as (t).
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.IP 8 3
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Newly-allocated data blocks are overwritten with blocks of (z)eroes before use.
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.IP 9 3
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Volume Health, where there are currently three groups of attributes identified:
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.IP
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Common ones for all Logical Volumes: (p)artial, (X) unknown.
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.br
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(p)artial signifies that one or more of the Physical Volumes this Logical
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Volume uses is missing from the system. (X) unknown signifies the status
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is unknown.
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.IP
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Related to RAID Logical Volumes: (r)efresh needed, (m)ismatches exist, (w)ritemostly.
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.br
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(r)efresh signifies that one or more of the Physical Volumes this RAID Logical
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Volume uses had suffered a write error. The write error could be due to a
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temporary failure of that Physical Volume or an indication that it is failing.
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The device should be refreshed or replaced. (m)ismatches signifies that the
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RAID logical volume has portions of the array that are not coherent.
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Inconsistencies are detected by initiating a "check" on a RAID logical volume.
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(The scrubbing operations, "check" and "repair", can be performed on a RAID
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logical volume via the 'lvchange' command.) (w)ritemostly signifies the
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devices in a RAID 1 logical volume that have been marked write-mostly.
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Re(s)haping signifies a RAID Logical Volume is either undergoing a stripe
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addition/removal, a stripe size or RAID algorithm change.
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(R)emove after reshape signifies freed striped raid images to be removed.
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.IP
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Related to Thin pool Logical Volumes: (F)ailed, out of (D)ata space,
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(M)etadata read only.
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.br
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(F)ailed is set if thin pool encounters serious failures and hence no further I/O
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is permitted at all. The out of (D)ata space is set if thin pool has run out of
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data space. (M)etadata read only signifies that thin pool encounters certain
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types of failures but it's still possible to do reads at least,
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but no metadata changes are allowed.
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.IP
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Related to Thin Logical Volumes: (F)ailed.
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.br
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(F)ailed is set when related thin pool enters Failed state and no further I/O
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is permitted at all.
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.IP
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Related to writecache logical volumes: (E)rror.
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.br
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(E)rror is set dm-writecache reports an error.
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.IP 10 3
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s(k)ip activation: this volume is flagged to be skipped during activation.
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