Re: 'Raiding' LDEV1 (Was: HP3000 Homesteading Questions)

To echo and summarize what's been said so far:

It's possible - indeed feasible - to utilize hardware mirroring on ldev 1.

The best solution is a mod20 or mod10. (the major difference between them being the total number of disk modules supported - 20 vs. 10, respectively).

Next best would be Autoraid12h.

Finally, it's possible to have hardware mirroring on ldev 1 with a va7xxx, but would require a costly HP hardware "brick" (as so eloquently described by Craig) if on a non A-class and non N-class 3k.

Also, a mod10/20 works fine with a single FWSCSI card - although 2 is better.



At 01:06 PM 2007-11-26, Deane Bell wrote:
Nothing like relying on good advice from folks who've 'been there, done that'. Regarding both your posts to the 3000 list, IS there an HP supported solution for replacing the 4GB internal LDEV1 with something that supports RAID (or at least mirroring)? We currently have our production data in 'Jamaica' units, fully mirrored (Mirror/iX), but indeed I've been worried about the ancient LDEV1 ... enough that we do everything possible to NOT shutdown power. It has reached the point where I have concern that if the drive ever lost it's taste for power ... it might never spin up again and the thought of a RELOAD is not fun.

We currently have our system on full HP Support.
LDEV: 1; Type: ST34573WC; Size: 4.29Gb; Path: 10/4/24.6.0

Any advice, specific hardware make/models, software for addressing the single LDEV1 situation would be appreciated.

Thank you.

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Date: Tue, 20 Nov 2007 11:51:52 -0800
From: donna hofmeister <hofmeister.donna@xxxxxxxxx>
Subject: Re: HP3000 Homesteading Questions

...... i'll as strongly as possible urge you to look at
upgrading your disc. it's probably the one component most likely to
fail on your box -- especially if you're still running internal 4 or
8gb drives. if your drives have been in service for more than 8-10
years (did you put in new disc to upgrade to 5.5 for y2k?), imo you're
skating on thin ice! it's a matter of time before you'll be changing
disc in a panic instead easily over some weekend. so ask your vendor
-- do you have staff that can assist with a disk migration?

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Date: Tue, 20 Nov 2007 14:17:23 -0600
From: John Lee <jlee@xxxxxxxxxxxxxxxxx>
Subject: Re: HP3000 Homesteading Questions

Superb advice from donna. I've been doing this for 12 years and the sites we support who have the smoothest operation do as donna suggests. They rarely have unscheduled downtime or emergencies.

And one more word on old disc. If you're not RAIDed, you're not doing your homework. It's inexpensive and light years ahead of old internal SE SCSI disc.

John Lee
Vaske Computer Solutions

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