> It is a 7 drive array. If you use 6 of 7 drives, md will not try to
> re-sync. But I have no idea if how to re-use the previous RAID data.
>
If you mean the previous configuration, I have it on
a writing pad and will gladly type it into a raidtab or
mdadm incantation.
mdadm doesn't look like it will do it yet because --assemble
only works for devices with Linux RAID superblocks, --build
won't do RAID 5, and --create, according to the manual page,
says "--readonly" is not supported, and will create superblocks.
Otherwise I would do the command below:
mdadm --create /dev/md0 --level=5 --raid-devices=7 \
/dev/sdg /dev/sdf /dev/sde /dev/sdd /dev/sdc /dev/sdb missing
Instead, if I were to insert this raidtab, would it do the right thing?
raiddev /dev/md0
raid-level 5
persistent-superblock 0
nr-raid-disks 7
parity-algorithm left-symmetric
device /dev/sda
failed-disk 6
device /dev/sdb
raid-disk 5
device /dev/sdc
raid-disk 4
device /dev/sdd
raid-disk 3
device /dev/sde
raid-disk 2
device /dev/sdf
raid-disk 1
device /dev/sdg
raid-disk 0
>
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