Compaq Proliant Storage System U2 and Kouwell adapters

[Kenneth Goodwin]

from the sound of it,I believe he just needs to short cable
between the two halves.
It depends on how things are labeled.
I believe the box may have just two separate backplanes.
If it has Four Scsi connectors on the back, then connector
one is primary IN
connector Two functions as either TERMINATOR One or Daisy
Chain OUT
Connector three is either Secondary in or Daisy Chain IN and
connector Four is either Terminator Two or daisy chain to
next cabinet.  For sharing under this arrangement, there
would have to be a second set of connectors
Or you could do the following (modify scsi id's
accordingly):

	Server1 Controller scsi id set to 0
	cable controller to Primary IN port connector one

	Daisy chain using short scsi cable from Daisy chain out to
daisy chain In (connector two to connector three)
		(This couples the two backplanes together giving you
access to all drives in the array)
	Drives are scsci 1 through scsi 13

	Server2 controller scsi id set to 15
	cable controller to connector four

	Now both controllers will see all drives and each other.

	however - BOTH SERVERS CAN NOT Generally read/write to the
same slices/filesystems on the disks.
	Otherwise you will get corrupt filesystems. Even in a
READ/write server 1, read only server 2
	config there are issues becuase of the server based
caching.

>  -----Original Message-----
>  From: redhat-install-list-bounces at redhat.com
>  [mailto:redhat-install-list-bounces at redhat.com]On Behalf
Of
>  Rick Stevens
>  Sent: Monday, March 22, 2004 1:49 PM
>  To: Getting started with Red Hat Linux
>  Subject: Re: Compaq Proliant Storage System U2 and
Kouwell adapters
>
>
>  Michael Ault wrote:
>  > I am trying to configure a shared storage system using
>  > the Compaq Proliant Storage System U2 with Kouwell
>  > Scsi cards to two RedHat 3.0 AS systems. This uses the
>  > initio drivers. I have got the systems to "see" the
>  > array but the one plugged into channel 1 sees only the
>  > first 6 drives and the one plugged into channel 2 sees
>  > only the last 6 drives. I need both systems to see all
>  > the drives. I get devices 1-15 when looking at the
>  > configuration tool at boot time, but with Linux system
>  > 1 the first six drives show up with 1-6 as the first
>  > drives listed and nothing for the second set, and with
>  > linux system 2 I get drives 7-13 showing up as 1-6 and
>  > nothing showing up as 7-13.
>  >
>  > Any one seen this type of behavior? Do I have to use a
>  > SCSI switch? (I hope not, those darn things are
>  > expensive).
>
>  I've done similar stuff but not with the Compaq device.
It
>  sounds more
>  like a LUNning issue with the Compaq than an issue with
>  Linux.  It was
>  with the thing I used.  The storage controller, by
default, presented
>  the drives as LUNs under a single SCSI ID and split them
up
>  between the
>  external SCSI ports.  When I reconfigured it to treat the
drives as
>  individual SCSI IDs rather than LUNs and told it to make
all drives
>  available to all SCSI ports, it worked peachy.  I can't
>  recall who the
>  maker of the device was.  If it's important, I can dig it
up
>  (the unit
>  is in storage right now as the client that used it went
belly-up).
>
>  If the Compaq devices is configured to present all drives
to all SCSI
>  ports, it should work.  As it stands, it looks like
you've got it set
>  to split the drives beween the two SCSI ports.  Since I'm
>  not familiar
>  with the specifics of the Compaq, I can't help beyond
that other than
>  what I said above.
>  ---------------------------------------------------------
----
>  ---------
>  - Rick Stevens, Senior Systems Engineer
>  rstevens at vitalstream.com -
>  - VitalStream, Inc.
http://www.vitalstream.com -
-                                                           
         -
-     Is that a buffer overflow or are you just happy to see
me?     -
------------------------------------------------------------
----------


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