On Thu, 26 Aug 1999, Chris R. Brown wrote:
> Hi all,
> Do you need a persistant superblock for raidstart to work on a
> raid-5 array? I recently remade it without one and now raidstart
> doesn't work. I have to do a "mkraid /dev/md0" to get it to start.
> Is there any thing else that could be wrong?
you should really-really use superblocks with any newly created RAID
array. raidstart only works with 'persistent containers', obviously. (it
cannot know without some metadata wether a particular disk is member of a
RAID array.) Recreating an array based on /etc/raidtab on every bootup is
rather unsafe, you might get lost data if you accidentally switch two
disks or a disk fails to start up!
the only case where superblock-less arrays make sense are legacy RAID0 and
LINEAR setups.
-- mingo
