My impression was that the s/w raid code only wrote to the ends (last 4k)
of each device, so I'm trying to clarify the following paragraph from
http://ostenfeld.dk/~jakob/Software-RAID.HOWTO/Software-RAID.HOWTO-4.html#ss4.7
The persistent superblocks solve these problems. When an
array is initialized with the persistent-superblock option in
the /etc/raidtab file, a special superblock is written in the
*beginning* of all disks participating in the array. This allows the
kernel to read the configuration of RAID devices directly from
the disks involved, instead of reading from some configuration
file that may not be available at all times.
Is the paragraph wrong or am I misunderstanding persistent superblocks?
Thanks,
James
--
Miscellaneous Engineer --- IBM Netfinity Performance Development
