Re: "Enhanced" MD code avaible for review

Justin T. Gibbs wrote:

quoted

Jeff Garzik wrote:

Just so there is no confusion...  the "failing over...in userland" thing I
mention is _only_ during discovery of the root disk.

None of the solutions being talked about perform "failing over" in
userland.  The RAID transforms which perform this operation are kernel
resident in DM, MD, and EMD.  Perhaps you are talking about spare
activation and rebuild?

This is precisely why I sent the second email, and made the 
qualification I did :)

For a "do it in userland" solution, an initrd or initramfs piece 
examines the system configuration, and assembles physical disks into 
RAID arrays based on the information it finds.  I was mainly implying 
that an initrd solution would have to provide some primitive failover 
initially, before the kernel is bootstrapped...  much like a bootloader 
that supports booting off a RAID1 array would need to do.

	Jeff