Hi John,

have you a tool like SCOPE/Strobe/Intune ? so that you can see that the 3590
devices makes 256 KB per IO ?

here is a part from the IBM announcment for tsm 4.2 :

At a Glance
Enhancements to Tivoli Storage Manager for S/390 Edition: 

Improves performance (up to 40%) when writing to 3590 tape devices (or
devices that emulate 3590 on OS/390 V2R10 or z/OS systems) 

(at site : http://www.ibmlink.ibm.com/usalets&parms=H_201-219 )

in your mail you wrote : ... 3480 to 3490 migration ...  i hope you mean
3590 migration !! 


Helge

-----Ursprüngliche Nachricht-----
Von: John Naylor [mailto:john.naylor AT SCOTTISH-SOUTHERN.CO DOT UK]
Gesendet: Freitag, 11. April 2003 14:16
An: ADSM-L AT VM.MARIST DOT EDU
Betreff: TSM on Mainframe, Using STK 9840 Drives in 359 0 Image Mode



TSM 4.2.2
 OS390 2.10
STK 9840
Seeing the note from Helge has set me thinking that I would like the cpu
saving
from 256k block
rather than 32K
I have already been through a  3480 to 3490 migration  and then adding pools
using 9840 with device type cartridge.
Are there any differences/gotchas in adding pools using 9840s with  a  3590
device class
Thanks,
John





"Kraan, Helge van de" <helge.vandekraan AT volkswagen DOT de> on 04/07/2003
10:43:04 AM

Please respond to "ADSM: Dist Stor Manager" <adsm-l AT vm.marist DOT edu>

To:   adsm-l AT vm.marist DOT edu
cc:    (bcc: John Naylor/HAV/SSE)
Subject:  AW: Show of Hands, TSM on Mainframe,         Using STK 9840 Drives
in
      359 0 Im age Mode




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