At 2:06 PM -0600 2005-11-03, Dan Nelson wrote:
The biggest reason for going RAID-5 is that you only get 50% useable
capacity out of RAID 10, and at least 75% out of a RAID 5 (with a 3+1
layout. With an 8+1 layout you get 88%). If you don't need fast
writes, or your controller has sufficient cache to mask the write
penalty, RAID 5 sure holds a lot more data on the same disks.
However, with RAID-5 you're in seriously bad shape when one of
the disks dies. You really need to add a hot spare to that list.
And intelligent controllers can be used with other RAID types, too.
--
Brad Knowles, <[EMAIL PROTECTED]>
"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
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