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.