Dan Stromberg a écrit :
On Fri, 2005-06-10 at 09:11 +0200, Laurent CARON wrote:
Dan Stromberg a écrit :
Has anyone constructed a RAID 5 of RAID 5's using mdadm on a linux
system?
Was it reliable?
How large was it?
Thanks!
Seems to be a large waste of space....
Consider:
You have a bunch of "bricks" that can shuffle data between a NAS head
and a bunch of disks.
The disks are RAID'd (through the "bricks"), but if one of the bricks
themselves dies, you're kinda stuck.
But if you RAID 5 the RAID 5's, then you don't end up with massive
parity pounding, and your bricks aren't a single point of failure, and
you don't lose as much space as if you mirrored.
Sound copacetic?
Thanks for your feedback!
RAID 10 is IMHO a bit more efficient.
Raid 5 means at least 9 disks:
Usable capacity: 4 Disks
Read speed: Good
Write speed: poor
Raid 10 with 8 disks can store the same amount of data.
Read speed: Average
Write Speed: Better than raid5
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
