[prev in list] [next in list] [prev in thread] [next in thread] 

List:       adsm-l
Subject:    Re: Mixed SCSI/SAN drives in LAN free, is that possible?
From:       Kelly Lipp <lipp () storsol ! com>
Date:       2002-01-30 18:30:22
[Download RAW message or body]

This is one of those questions that has an obvious answer: of course TSM
knows which drives it's working with.  The mapping is set ahead of time and
the library manager knows what drives the storage agents can and cannot see.
It won't attempt to mount a tape in a drive the storage agent can't see.
Won't happen.  Can't happen.

The original answer: not a problem is correct.

Kelly J. Lipp
Storage Solutions Specialists, Inc.
PO Box 51313
Colorado Springs, CO 80949
lipp@storsol.com or kelly.lipp@storserver.com
www.storsol.com or www.storserver.com
(719)531-5926
Fax: (240)539-7175


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU]On Behalf Of
Norback, Jan
Sent: Wednesday, January 30, 2002 10:49 AM
To: ADSM-L@VM.MARIST.EDU
Subject: Re: Mixed SCSI/SAN drives in LAN free, is that possible?


Becky,
the fact that TSM doesn't care how the drives are attached is the part that
scares me. To me it sounds like:

-TSM might mount a tape in driveX, which could be SCSI attached
-TSM tell the storage agent to use driveX (which it doesn't have a clue
about as it is SCSI) and the backup will fail.

Is the above assumption correct or does TSM understand that it can't mount a
tape in a drive for which there is no drive mapping for this client?

SAN DGW isn't an option for this customer, I have used it for other
customers.

I am used to SAN and SCSI attached drives for LAN free but I haven't tried
the mixture...
Maybe there is a way to partition the 3494 so it looks like 2 different
libraries, one with SCSI and one with SAN or there might not be a problem?

/Jan Norback

-----Original Message-----
From: Davidson, Becky [mailto:Becky.Davidson@SLBG.COM]
Sent: Wednesday, January 30, 2002 6:11 PM
To: ADSM-L@VM.MARIST.EDU
Subject: Re: Mixed SCSI/SAN drives in LAN free, is that possible?


Jan
Not a problem at all.  TSM does not care how they are attached.  TSM depends
completely on the operating system for the intelligence on the attaching.
The 3494 is also intelligent enough to know if someone else is using the
drive that it can't.  Drive map all the SAN drives???  What you could do
which is relatively inexpensive is attach your 3590's to San Data Gateways
which attach to the SAN and then they would all be SAN attached.
Good luck
Becky

-----Original Message-----
From: Norback, Jan [mailto:Jan.Norback@ATOSORIGIN.COM]
Sent: Wednesday, January 30, 2002 10:53 AM
To: ADSM-L@VM.MARIST.EDU
Subject: Mixed SCSI/SAN drives in LAN free, is that possible?


Hi,
I have been asked by my customer if it is possible to mix SCSI and SAN
attached drives on TSM servers that are to perform LAN free backup.
I know that I need to drivemapp all the SAN drives but what will TSM do with
the SCSI attached drives, is it cleaver enough to make sure that it doesn't
mount any tapes for LAN free backups and restores in those drives?

Why not upgrade all drives? Money, money...

This setup:
-TSM server 4.2 on AIX 4.3.3
-3494 libraries
-3590E tapes (SCSI and SAN)

Regards,
Jan Norback
Tivoli Certified Consultant: ADSM/TSM
IBM Cert. Adv. Technical Expert RS/6000 AIX
Atos Origin-IT (MS/DS/OSS Unix)
VA-106, PO-box 218, 5600 MD Eindhoven, The Netherlands
Groenewoudseweg 1 5621 BA Eindhoven, The Netherlands
Email: Jan.Norback@Atosorigin.com
Tel: +31 (0)40-2780289
Mobile: +31 (0)6-12994492
Fax     : +31 40 2783962

[prev in list] [next in list] [prev in thread] [next in thread]