RE: 3580 LTO7 Tape drive

If you are backing up lots of small objects and do not need the last save date, then change the Update history (UPDHST) from the default of *YES to *NO. Then you are only reading the disk and not writing to each object with the tape volume, date and time. This can greatly speed up a small system with lots of small objects such as programs, display files, print files, etc..

Chris Bipes
Director of Information Services
CrossCheck, Inc.


-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Gad Miron
Sent: Wednesday, August 3, 2022 12:37 AM
To: midrange-l@xxxxxxxxxxxxxxxxxx
Subject: 3580 LTO7 Tape drive

Hello guys

I'm trying to speed up a nightly save to a 3580 LTO7 stand alone tape drive and would like some advice with the following:

a. Will specifying COMPACT(*NO) on the SAVLIB CMD expedite matters ?
we now use DTACPR(*DEV) and COMPACT(*DEV)

b. On a 3580 spec web page I found a remark pertaining to Full Hight vs.
Half Hight
models . see remark No.7 on this page

https://www.ibm.com/support/pages/tape-drive-model-characteristics-lto-and-3592-drives
Is a Full Hight model Faster the Half Hight? or Vice versa?

TIA
Gad
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