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September 2003, Week 4

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Subject:
Re: Disk recommendations - also
From:
Craig Lalley <[log in to unmask]>
Reply To:
Craig Lalley <[log in to unmask]>
Date:
Thu, 25 Sep 2003 00:32:14 -0700
Content-Type:
text/plain
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text/plain (63 lines) 
Terry,

A simple solution would be to use a VA7100, with a very nice 2GB of cache.

The problem is that the only supported solution is to use the A5814A fiber SCSI
router.  Which is a 1 fiber to 1 FW/SCSI conversion, for about 7k.  The problem
is you probably want 8 of them.  If you want an offically "unsupported" but
working solution, send me an e-mail.

An XP256 is a great solution, just keep the spindle count high.  I have also
seen really good performance with the HVD10's.

-Craig

--- "Simpkins, Terry" <[log in to unmask]> wrote:
> I was preparing to ask a very similar question, so I will.
>
> We're not planning to upgrade the box, because we don't see significant CPU
> utilization,
> but we have been seeing significant queue lengths via SOS (Lund).
>
> Our current configuration is:
>
> 959/200 (maximum memory installed)
> system volume set  (model 10 array w/ 6 disks on F/W)
> 3 user volume sets
>   - total of 10 HASS enclosures
>   - 32 2.0Gb disks (16 mirrored to 16) on 4 F/W channels
>   - 48 4.3Gd disks (24 mirrored to 24) on 4 F/W channels
>
> We intentionally stayed with smaller drives to keep the number of spindles
> up.
> The production data is all on the 32 2Gb drives with 8 drives on each F/W
> channel.
> The 4.3Gb drives have 12 drives per F/W channel, but those are test and
> backup sets.
>
> What would others recommend to improve disk throughput?
> Should we replace the F/W with Fiber?
> Should we replace the HASS units with Arrays and eliminate the mirroring?
>
> Any other ideas?
>
> *****************************
> Terry W. Simpkins
> Director - ISIT
> Measurement Specialties
> 757-766-4278
> [log in to unmask]
> *****************************
>
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