RE: 6618 drives for model 270

The only way to reduce risk to zero is to not use computers. But then
you lose paper or memory ;-)

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-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Joe Pluta
Sent: Thursday, August 16, 2007 10:18 AM
To: 'Midrange Systems Technical Discussion'
Subject: RE: 6618 drives for model 270

From: rob@xxxxxxxxx

Having replaced a few failed drives, I don't think the process is all

that

tricky. Remember, you add it to the RAID set, THEN you add it to the

ASP.

Hee hee... somehow, I get the idea that you've done it once or twice in
the
past, Rob.

The longest process is when it then formats the drive as one of these
steps. So I don't think the hot live disk saves you anything. Might

even

confuse the issue by trying to use D24 for what D22 used to do.

Makes sense to me. The only issue was that there is some discussion as
to
whether keeping a drive powered up and spinning is better than having it
sit
on a shelf cold. Those who have any opinion one way or the other seem
to
think that it's worth keeping the drive spun up to avoid stiction (and
the
old "gentle whack against the desk" fix).

The more I look at it, the more I think that five drives for reduced
heat
and load and just keeping drives on the shelf should be fine. With
regular
backups, my window of vulnerability is if a drive goes down while I'm on
the
road; I can't replace the failed drive until I get back, and a second
failure trashes the machine back to the most recent backup. Even with
an
extra drive in the cage, I still have the possibility of two drives
failing
at once anyway, so I'm just reducing risk, not eliminating it.

Joe