Ron,
Thanks for your response. But I don't think my problem has to do with
co-location. All the required data is on that one 3590 tape. The filesystem
that I was trying to restore is on the same machine as the ADSM server.
Also the data for the file system should be fairly 'sequentially' stored on
the tape because to create the offsite tape, I did a full backup to a newly
created DRPOOL and then backed that up to the offsite pool. The data on
that file system is also very static. The problem appears to be the way
ADSM handles lots of small files vs a few large files. For example, to
restore a 363mb 'mksysb' file only took less than 10 minutes.
I remember last year there was some discussion on this subject but I don't
recall ever seeing any resolution to it.

At 07:50 AM 5/6/97 -0500, you wrote:
>David,
>We have 3590s in 3490 compatiblity mode.  We restore almost 1GB/hr on a
>co-located tape from MVS on a 9672 to a Netware server via a 100Mb/s
>fddi card.  If a tape is not co-located it will absolutely kill your
>performance on restore regardless of any other hardware you may have.
>It's pay me now or pay me later.
>
>Ron Clendenny  <rdclendenny AT cal.ue DOT com>
>Callaway Nuclear Power Plant
>Fulton, Missouri
>
>"No sir! Away! A papaya war is on" - Palindrome Pete
>
>> -----Original Message-----
>> From: David Ong [SMTP:david AT BABYONG.NSC DOT COM]
>> Sent: Monday, May 05, 1997 7:47 PM
>> To:   ADSM-L AT VM.MARIST DOT EDU
>> Subject:      3590 Read Performance
>>
>> Hello ADSMers,
>>
>> Last week I had the misfortune of doing our very first DR exercise
>> which
>> involved recovering our ADSM server, v2.1.0.9 on AIX 4.1.4 and then
>> using
>> ADSM to recover an AIX 4.1.4 node. The ADSM server recovery part went
>> pretty much as planned and rather smoothly. The biggest stumbling
>> block we
>> ran into was the amount of time it took to restore data from the
>> 'offsite'
>> 3590 tape. For example, to restore a file system with 10,933 files and
>> a
>> total of 732 MBs, took over 3.5 hours. Question: Is this the kind of
>> performance one should expect from the 3590s? I would appreciate
>> hearing
>> from anybody with experience restoring from 3590 tapes.
>>
>> Thanks in advance.
>>
>> Have a nice day or whatever's left of it.
>>
>> David Ong
>> National Semiconductor Corp.
>
>

Have a nice day or whatever's left of it.

David Ong
National Semiconductor Corp.