Linked by Thom Holwerda on Mon 18th Jan 2010 16:57 UTC, submitted by wanker90210
Hardware, Embedded Systems ACM's latest journal had an interesting article about RAID which suggested it might be time for triple parity raid. "How much longer will current RAID techniques persevere? The RAID levels were codified in the late 1980s; double-parity RAID, known as RAID-6, is the current standard for high-availability, space-efficient storage. The incredible growth of hard-drive capacities, however, could impose serious limitations on the reliability even of RAID-6 systems. Recent trends in hard drives show that triple-parity RAID must soon become pervasive."
Permalink for comment 404964
To read all comments associated with this story, please click here.
by gilboa on Tue 19th Jan 2010 17:40 UTC in reply to "RE[4]: RAID Z"
Member since:

While I do see where you're coming from, I think you've over-racted to the opening post as nobody was suggesting that ZFS was the solution to everything.
We were just saying that currently there is a solution to the lack of triple parity RAID and that solution is ZFS. It was a very specific point he was making rather than the generalised "ZFS will solve world debt" type evangelical speak that you're (understandably) sick of reading.

Guess I misread the initial post.
As you suggest, even though I'm using (mostly for tests and multi-platform support) Solaris and FreeBSD machines, and do appreciate ZFS, I'm somewhat tired of the general "ZFS is the new green" auto-posts.

As for what I have "against" ZFS, pleas read this:

Sure there's needs for other solutions and standards - nobody disagrees with that. But the fact remains that ZFS DOES address the triple parity problem.
So personal opinions of ZFS aside - the original poster was spot on with his comments

ZFS does solve this issue, but so does software RAID1 over two sets of RAID5/6. (Read: it greatly depends on your definition of what counts as a solution...)

One cannot ignore the fact that unlike a theoretical hardware RAID7 controller, ZFS/OpenSolaris combo is not suited for everybody - far from it.

- Gilboa

Reply Parent Score: 2