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As Patrick alluded too, there is much more to this than the drive.

I agree that leaving the DTACPR and COMPACT parameters is correct. Let the drive compress it will only slow down if you force it not to and it will take more tape too, double fail.

From my experience the speed delta between 1/2 high and full high drives is negligible.

Also from my experience, 'it's not the tape drive.' It almost never is any more. Sure, back in the QIC or 8MM or even LTO1 drive days it often was, but for most IBM i shops an LTO7 won't be the problem.

As you haven't mentioned anything about the size of the server, processor, memory, number and type of arms, or the type of the data being saved, we would only be guessing at what might help.

- DrF

On 8/3/2022 3:37 AM, Gad Miron wrote:
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

Is a Full Hight model Faster the Half Hight? or Vice versa?


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