ADSM-L

Re: TSM with library & 1 drive

2002-09-25 16:15:06
Subject: Re: TSM with library & 1 drive
From: Joerg Pohlmann <jpohlman AT CA.IBM DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 25 Sep 2002 13:06:50 -0700
One additional consideration - you cannot do a proper job of DR protection
if you really only have 1 drive. For your copy storage pool, you will need
an additional drive in order to do offsite reclamation. The drive doesn't
have to be the same technology. I have a customer who is using an LTO
autoloader for their primary storage pools and a few 8mm Mammoth (manual
library) drives for their offsite storage. DRM manages all data going
offsite, coming back, and of course the most valuable aspect - it creates
the DR plan file. For the primary storage pools, the disk reclamation pool
works fine, and for offsite reclamation we are copying LTO to 8mm.

Joerg Pohlmann






Gerald Wichmann <gwichman AT ZANTAZ DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
2002-09-25 12:51
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Re: TSM with library & 1 drive



1. Nothing wrong with it per say.. It works great. You'll have to allocate
some disk space for your reclamation pool but in my experience it works
well. Also there are the obvious limitations that having only 1 drive
presents such as when someone requests a restore, if their data is on tape
and another user is already doing a restore they'll have to wait for that
drive to free up. Also similar potential limitations in backup or
migration
of data. No redundancy so if the drive dies you're out of luck until it's
fixed or replaced (can't backup or restore any data to/from tape). The
same
things you'd bring up if you were considering 2 drives vs 3.. or 4.. The
NEED for 2 drives over one is mostly a throughput, redundancy, and
availability issue.
2. nothing wrong with an autoloader.. works just like a tape library more
or
less.

Gerald Wichmann
Senior Systems Development Engineer
Zantaz, Inc.
925.598.3099 (w)

-----Original Message-----
From: Ofer vaknin [mailto:Ofer-va AT COMPUTER-DIRECT.CO DOT IL]
Sent: Wednesday, September 25, 2002 6:34 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: TSM with library & 1 drive
Importance: High

Hi all

1. do anybody know of any problems that TSM can not be install with IBM
library with 1 drive only, and must need 2 drives ?
2. is TSM can be install with IBM autoloader ,and how will it function ?

Thanks In Advance
Ofer Vaknin


**********************************************************************
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.

This footnote also confirms that this email message has been swept by
MIMEsweeper for the presence of computer viruses.

www.mimesweeper.com
**********************************************************************


This e-mail has been captured and archived by the ZANTAZ Digital Safe(tm)
service.  For more information, visit us at www.zantaz.com.
IMPORTANT: This electronic mail message is intended only for the use of
the
individual or entity to which it is addressed and may contain information
that is privileged, confidential or exempt from disclosure under
applicable
law.  If the reader of this message is not the intended recipient, or the
employee or agent responsible for delivering this message to the intended
recipient, you are hereby notified that any dissemination, distribution or
copying of this communication is strictly prohibited.  If you have
received
this communication in error, please notify the sender immediately by
telephone or directly reply to the original message(s) sent.  Thank you.

<Prev in Thread] Current Thread [Next in Thread>