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| author | Neil Brown <neilb@suse.de> | 2006-08-07 03:11:42 +0200 |
|---|---|---|
| committer | Neil Brown <neilb@suse.de> | 2006-08-07 03:11:42 +0200 |
| commit | 2a940e3619b0ae37b3a98b1bd6f297ac54a29879 (patch) | |
| tree | d443a1cf00e984ea13a16dfa9add44fcd9281abf /md.4 | |
| parent | Release 2.5.2 (diff) | |
| download | mdadm-2a940e3619b0ae37b3a98b1bd6f297ac54a29879.tar.xz mdadm-2a940e3619b0ae37b3a98b1bd6f297ac54a29879.zip | |
Document usage of version0.91 superblock.
Diffstat (limited to 'md.4')
| -rw-r--r-- | md.4 | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -74,6 +74,14 @@ UUID a 128 bit Universally Unique Identifier that identifies the array that this device is part of. +When a version 0.90 array is being reshaped (e.g. adding extra devices +to a RAID5), the version number is temporarily set to 0.91. This +ensures that if the reshape process is stopped in the middle (e.g. by +a system crash) and the machine boots into an older kernel that does +not support reshaping, then the array will not be assembled (which +would cause data corruption) but will be left untouched until a kernel +that can complete the reshape processes is used. + .SS ARRAYS WITHOUT SUPERBLOCKS While it is usually best to create arrays with superblocks so that they can be assembled reliably, there are some circumstances where an |