Hello,
This may be one of those dumb questions, but I'm trying to install some new
disks in the two internal shelves of an AlphaServer 2100 4/266. Up to now
we've had 8 disks in one shelf split between two channels on a SWXCR RAID
Array 230 3-channel controller. The two internal shelves are each made up
of two separate buses of four slots each (for a total of sixteen slots). I
can't figure out how to connect two buses on one shelf in order to have a
single bus that can handle up to eight disks. If I can't connect the buses,
I have to use a separate RAID controller channel for each bus, which means
a maximum of 12 disks on my controller instead of 21!
The manual for my AlphaServer 1000A goes into great detail on all the
different possible configurations of the backplane (pages 6-22 and
following). The manual of the AS 2100 is quite defficient in this regard
(page 3-42). In particular, for the AS 1000A it is explained how to set the
cables and jumpers to get a single SCSI bus on the backplane (the AS 1000
series only having a single 8-slot internal shelf).
I've tried putting a jumper cable between the buses on the backplane and
tried all the possible jumper settings of the four jumper pins I found
hidden on the backplane, all without success. The jumper cable alone seems
to produce two slots with the same SCSI address on each shelf. Setting any
of the jumpers seemed to keep any of the disks on that shelf from spinning
up at all.
Has anyone ever setup an AlphaServer 2100 to use only two SCSI or RAID
channels for all the internal disks? How do I get a single SCSI bus on one
of the internal shelves? Or is there a reason this doesn't seem to be
documented anywhere?
Thanks as always!
kevin reardon
Received on Wed Jul 09 1997 - 18:55:50 NZST