Bus sharing question

From: Unix Administrator <unixadmin_at_gmd.com.pe>
Date: Wed, 21 May 1997 16:06:06 -0500

Hi,

We got two AlphaServer 4100, each one with two KZPSA connected to an
HSZ50 which resides on an SW800 cabinet :

                      SW800:

BUS C: Node A KZPSA -------HSZ50---------KZPSA Node B
BUS D: KZPSA -------HSZ50---------KZPSA

The first KZPSA-HSZ50-KZPSA is bus C, and the second KZPSA-HSZ50-KZPSA
is bus D.

Actually, node A is accessing all the 22 disks on SW800 (through buses C
& D), and node B just access its own disks on SCSI local buses (however,
it can see all the 22 disks also). Node A has these disks configured
with LSM on a diskgroup different than rootdg.

What we plan to do (if possible) is to use B as a contingency node of
node A. We've tried to deport/import the diskgroup, but it doesnt works.

In that sense, we plan to add the SW800's disks to the node B LSM
database (with "voldiskadd rzb17", for example).

Is this safe ? Will the voldiskadd operation initialize the disks ? Any
previous experience ?

We know that this could be done with DECSafe ASE, but we would like to
know whether this works or not.

Thanks in advance
Received on Wed May 21 1997 - 23:16:44 NZST

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