RE: Upgrading disks

[Chris Bipes <chris.bipes@xxxxxxxxxxxxxxx>]

First step is to do a complete system backup.  Two recommended.

Next step is to stop RAID and Mirroring.

Now you can, using DST/SST remove / Pump a drive.  Depending on percent of
DASD used, you may be able to remove a couple.

Next insert the new drive(s) and add to the ASP.  Once recognized, you can
remove a couple of more drive.  Remember you now have more capacity so you
may be able to remove more drive than before.

By the way,  this system is NOT hot plugable so you have to power down to
physically remove the drives, and put in the new ones.  It is tedious and
time consuming.  Check your %ASP after stopping the RAID and Mirroring so
you can calculate the number of drives to remove.  Re-check after adding the
new drives.  Hopefully you only have to run thru the step twice.  Three
times if your ASP is above 80%.

The worst part is starting the RAID set and Mirroring AFTER all the drives
are replaced.  This will take HOURS!

I don't think you can use the save storage.  It save the entire contents if
the drive, (unused space too).  It was written for replacing a failing drive
with the same type of drive.  I do not think, but not sure, if you can
restore to a larger capacity drive.

Christopher K. Bipes      mailto:Chris.Bipes@Cross-Check.com
Operations & Network Mgr  mailto:Chris_Bipes@Yahoo.com
CrossCheck, Inc.          http://www.cross-check.com
6119 State Farm Drive     Phone: 707 586-0551 x 1102
Rohnert Park CA  94928    Fax: 707 586-1884


-----Original Message-----
From: M. Lazarus [mailto:mlazarus@ttec.com]
Sent: Monday, November 11, 2002 8:01 AM
To: midrange-l@midrange.com
Subject: Upgrading disks


  A client would like to upgrade their disks in an old system (model
400).  They currently have 12 x 2GB disks.  There is one pair that is
mirrored and the rest are RAID'ed.  Since there are no available bays, if
they wanted to double or almost double the size of their disk space, what
would the procedure be to transfer the data?

  Can the data be "pumped" somehow or does a full system restore need to be
done?  If the latter, can a SAVSTG be done?