On 12/23/07, Christopher Chan <[EMAIL PROTECTED]> wrote:
> Patrick Ale wrote:
> > On 12/22/07, Christopher Chan <[EMAIL PROTECTED]> wrote:
> > <snip>

PSU = Power Supply Unit, and you need at least two of them when using
XFS IMO (and according to SGI self).

A UPS is also good but it only helps you against power delivery
issues. It doesn't help against people working in your server racks
and accidently yanking cables  or a PSU blowing away.

Battery-backed caches are caches (mostly on RAID controllers) that
will hold the data for an X amount of minutes while the power delivery
is interupted, allowing the disks to sync up.



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