Server Suggestion Request

[Gavin McCullagh]

Hi,

On Mon, 30 Jun 2008, Daniel Kahn Gillmor wrote:

> Is this still true with modern mdadm?  I thought that the RAID
> superblock on modern systems contained information about
> "last-written" times, to enable recovery from exactly this problem.
> I'm not a RAID guru, though: if anyone could point me toward the
> relevant documentation, i'd be grateful.

Are you talking about write-intent bitmaps?  I don't think they prevent
inconsistency, so much as speed the resync.

http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID#Write-intent_bitmap

There are other situations when inconsistency can occur, though I'm not
sure how they compare to a hardware raid situation.

http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID#Caveat

Gavin