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 404921
To read all comments associated with this story, please click here.
RE[4]: RAID Z
by computeruser on Tue 19th Jan 2010 15:12 UTC in reply to "RE[3]: RAID Z"
computeruser
Member since:
2009-07-21

I can use a on-board RAID5 controller (read: soft-RAID) built array and move it from Windows to Linux and back, it's a standard.

You can move a RAID array using a certain implementation and move it to another operating system that also supports that implementation. But people generally do not need to do this in the real world. (And there isn't really a standard filesystem worth running between Windows and Linux.)

Different hardware and software RAID implementations are implemented in different ways; they are in no way standardized other than they all implement some form of mirroring, striping, and striping with parity (for those supporting RAID5/6). Linux dmraid understands some of these proprietary formats.

... And yet, its still irrelevant for the rest of the world.

OpenSolaris is not irrelevant to the rest of the world - it's freely downloadable and usable, just like that "Linux" thing that was irrelevant in the early 90s. And the new ZFS features in OpenSolaris will be in Solaris at some point.

I personally use Linux md RAID1, RAID10, and RAID6, and these arrays only work on Linux.
I don't run any Linux applications on the server other than those needed to share the filesystems / arrays. I could provide the same services using OpenSolaris (or Windows, or FreeBSD...) And OpenSolaris has the huge advantage of ZFS.

"ZFS is not the only way to provide redundancy for a boot partition.

So?
"
You mentioned the inability to boot from ZFS RAID with GRUB as if it were a major disadvantage that makes ZFS unusable in a production environment. This is not the case.

Reply Parent Score: 2