Re: interaction with hardware RAID?

[Daniel Pocock <daniel@pocock.com.au>]

Just following up on this... does anyone know if any of this is
technically feasible even if not implemented/supported today?

Also, do any hardware RAID1 implementations offer something like the
full btrfs checksum functionality?

I've seen HP promoting their `Advanced Data Mirroring' in new Smart
Array products, but I've got no idea if that is just a marketing
gimmick, like the way they use the name `Advanced Data Guard' as a
moniker for RAID6

Looking around in Google, I was pleasantly disturbed to find so many web
sites (including some vendors) using the term `checksum' to refer to a
parity bit

On 22/08/12 13:05, Daniel Pocock wrote:
> 
> 
> 
> It is well documented that btrfs data recovery (after silent corruption)
> is dependent on the use of btrfs's own RAID1.
> 
> However, I'm curious about whether any hardware RAID vendors are
> contemplating ways to integrate more closely with btrfs, for example,
> such that when btrfs detects a bad checksum, it would be able to ask the
> hardware RAID controller to return all alternate copies of the block.
> 
> Is this technically possible within any hardware RAID device today, even
> though not implemented in btrfs?
> 
> Has there been any suggestion that vendors would support this in future,
> presumably for the benefit of btrfs, ZFS and other checksumming filesystems?
> --
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html