• NeilBrown's avatar
    md: fix buglet in RAID5 -> RAID0 conversion. · eea136d6
    NeilBrown authored
    RAID5 uses a 'per-array' value for the 'size' of each device.
    RAID0 uses a 'per-device' value - it can be different for each device.
    
    When converting a RAID5 to a RAID0 we must ensure that the per-device
    size of each device matches the per-array size for the RAID5, else
    the array will change size.
    
    If the metadata cannot record a changed per-device size (as is the
    case with v0.90 metadata) the array could get bigger on restart.  This
    does not cause data corruption, so it not a big issue and is mainly
    yet another a reason to not use 0.90.
    Signed-off-by: default avatarNeilBrown <neilb@suse.de>
    eea136d6
raid0.c 20.4 KB