Sekar

In my old mainframe days the practise was to copy tapes after a year.
I've not seen anything about more modern media, but I'm  inclined to run a job 
once a month to to a move data on any tape that hasn't been used for some 
defined period, be it one year or two or three.  This ensures that the data is 
readable and that the source tape is physically located once in a while.

Regards

Steve Harris
AIX and ADSM Admin
Queensland Health, Brisbane Australia


>>> sekar n <nsekar99 AT YAHOO DOT COM> 20/12/2000 0:29:51 >>>
Hi,
I think throughput, in general , is a question of many
factors. To quote live example, Iam getting around
3MB/s for various backup/archieve which runs over
fairly long period of 30 minutes. I have had 1 GB
backedup and restored in less than 8 minutes when the
restore was for a single file ( we do have many of
them hitting the ceiling of even excess of 20 GB, I
havent tried them yet!!). The environment on swithced
ethernet LAN of 100 Mbs, AIX /IBM 43P server and
clients on various platforms, backuppool of just 500
MB and migration /spillover pool on IBM 7331-305 with
Mammoth 20 GB exabyte catridge.
( incidentally can any one answer on shelf life of
Mammoth 20 GB catridges.. The predecessor 5/7 GB
exabyte where very poor on long time retention, i have
read like something less than 3 years)

hope info is useful

sekar narasimhan
ONGC, Chennai, India
mail - nsekar99 AT yahoo DOT com 


--- Louis Wiesemann <ljwies01 AT LOUISVILLE DOT EDU> wrote:
> I'm just looking for any guesstimates anyone might
> I'm just looking for any guesstimates anyone might
> have for the throughput we might "expect" to see
> restoring a Netware 3.1.08 client with a TSM 3.7.3.0
> OS/390 server.  This is over a 100M ethernet with
> 3490 tape robot on the server.  We have split the
> restore up over 4 sessions and have disabled any
> other TSM processing while we run the restore.
>
> We are seeing about 1.2G an hour actual data being
> restored.  Can anyone say whether this is about what
> we should expect?  I have been in contact with
> Tivoli and tuned the client and server options per
> their instructions.  I was wondering if anyone had
> any idea if this seems a reasonable rate.
>
> Thanks for any input.
>
>
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>
>
> Louis J. Wiesemann
>           502-852-8952
>
>
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