abuse at cabal.org.uk
Mon Oct 29 22:54:12 GMT 2007
On 29 Oct 2007, at 21:55, Martin A. Brooks wrote:
> Errm, they do completely different things. "I've decided that, given
> your budget, dreadlocks is the way to do. Were you able to spend
> more, I
> recommend liposuction".
I'm not denying that they are different, but for toy servers, RAID1
is an easy choice. It satisfies the KISS principle, that it requires
just two disks means you can get away without any add-in cards on
your typical cheap x86 box, and it has reasonable performance
characteristics that are no worse than a single disk solution.
RAID5 or RAID6 is a harder choice to justify. You need more spindles,
possibly an actual hardware RAID controller instead of Linux md, and
the performance on some workloads is going to suck. Plus it's
probably not going to fit in a 1U case any more unless you buy a
really expensive server and/or case.
(And in cases where I'd consider RAID5 or RAID6, Solaris ZFS and
RAIDZ is now strongly tempting instead.)
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