On 20 Nov 2009, at 14:25, John P. Looney wrote:
> Interesting statistic; I think about one in 2000 drives run at less
> than
> 20% max speed for all of their lives. I wonder does anyone notice ?
I had an interesting incident with HP recently. Disk throughput on one
of three identical machines was about 50% of the others. All had 8 SAS
drives in a PERC RAID6 . HP was having us update all manner of things
- PERC firmware etc. you wouldn't mind, but ILO firmware?
Early in the process we noticed in a diagnostic printout that all the
drives passed tests, but one took orders of magnitude longer than the
others. We pointed this out, and HP didn't acknowledge this, but kept
us going around the merry go round of installing new BIOS revisions of
various sorts.
Eventually I basically shouted at them and said "GIVE US A NEW BLOODY
DRIVE" which they did, and problem gone. This of course shows the
advantage of buying from a Tier 1 vendor where you have quality support.
Niall
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