Lesley,
We got 9840's very early and 3590 emulation wasn't available.
At the time we were running adsm 3.1 & tsm 3.7 didn't exist, so
there was no performance difference. You should choose 3590
emulation if there are no strong reasons for doing 3490 emulation.
If your site is os/390 and has dfsms-hsm, you definitely want
3590 for block count reasons.
--
--------------------------
Bill Colwell
C. S. Draper Lab
Cambridge, Ma.
[EMAIL PROTECTED]
--------------------------
In <[EMAIL PROTECTED]>, on 09/08/00
at 09:28 AM, "Walker, Lesley R" <[EMAIL PROTECTED]> said:
>Bill Colwell [SMTP:[EMAIL PROTECTED]] wrote:
>> TAPEIOBUFS came in with 3.7. All my storage pools are
>> on stk 9840s but they are emulating 3490's. I have tapeiobufs set
>> to 9 anyway; after the storage pools were in use, we
>> got some 9840's in 3590 mode. I hoped that I could do the dbb
>> to the 3590s and it would be faster but it wasn't.
>>
>Just out of curiosity, why do you have the 9840s emulating 3490s and 3590s?
>Is there an advantage to doing this, or is it just for compatibility with
>pre-existing tapes?
>The reason I ask is because I am in the throes of setting up a new
>implementation with STK 9840s (in a Powderhorn) and I don't know a lot about
>tapes yet.
