> -----Original Message-----
> From: MacDonell, Dennis
> Sent: Wednesday, 23 May 2001 11:07
> To: 'Alpha tru64 managers'
> Subject: Summary: Has someone put a Scsi Raid controller (KZPAC-CB)
> into a DS20E
>
>
> Hi,
>
In my earlier summary I neglected to mention that the KZPAC-CB will only
support 32gb volumes. This is a problem, and means that the card is just
about useless, and basically can not be used for any serious data storeage.
The better option would be to use a dual port scsi card, and use lsm to
mirror the disks across the split backplane of the 4314T( which I believe is
not sold as a 4314T if the backplane is split, but as a 4354 (thanks to
Davis, Alan [Davis_at_tessco.com])). My friendly Compaq person, seems to be
saying that the next generation of Raid controllers will be available for
DS20E's in the near future. There are scsi3 raid controllers available for
the ProLiant PCs at the moment. Someone also queried in the case of a split
backplane whether the scsi id's would be in the sequence 0-6. I can't
confirm what the scsi id's would be, but given that Tru64 V5 maps the disks
to names like /dev/disk/dsk0-n, it probably doesn't matter what the actual
scsi id's are. alan_at_nabeth.cxo.dec.com suggests that the actual id's would
look like SCSI ID | 00 | 01 | 02 | 03 | 04 | 05 | 08 | 00 | 01 | 02 | 03 |
04 | 05 | 08.
Here is the original summary:
> The DS20E supports the KZPAC-CB but the KZPAC-CB does not fully support
> the 4314T Storage works tower. Specifically it does not support
> (a) scsi addresses > 7
> (b) scsi3 bus speeds.
> However it would appear that there are people out there with the
> combination DS20E/KZPAC-CB/4314T (Thomas, Douglas L. [dthomas_at_glgt.com]).
>
> I don't know the full details as yet, but I believe you can get your 4314T
> delivered with a split back-plane. In that configuration I would expect
> you would have 2 sets of scsi addresses 0-6 rather than one set of
> addresses 0-13. Using the split backplane and a 3 channel raid controller
> should work well. At a latter stage, I should be able to upgrade the raid
> controller to one that can handle scsi3 bus speeds.
>
> Dennis
>
> ######################################
> Dennis Macdonell
> Systems Administrator
> email: mcdonell_at_auslig.gov.au
> ######################################
>
Received on Thu May 24 2001 - 03:02:05 NZST