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  3. August 2001

Re: USEOPTBLK effect on which drives?

Dan, USEOPTBLK works on the 7208-342 but not the other 7208 models.
 
DTACPR is really slow ... that's software compression of the data before sending to tape.
Better to use COMPACT(*YES) and have the tape hardware do the compression of the data.
 
Sue Baker
----- Original Message -----
From: Bale, Dan
Sent: Tuesday, August 14, 2001 12:57 AM
Subject: USEOPTBLK effect on which drives?

Can someone point me in the direction of the appropriate documentation that tells me whether USEOPTBLK(*yes) is effective on a 7208 model 012 tape drive on a V3R7 system?
 
Does USEOPTBLK(*YES) do any compression?  The help text doesn't really say anything except that it may offer a performance benefit.  I wondered about compression since USEOPTBLK(*YES) and DTACPR(*YES) cannot be used together.
 
If I'm tight on tape space and I've got plenty of time, would my better option be to use USEOPTBLK(*NO) and DTACPR(*YES)???
 
Thanks!
 
Dan Bale
Handleman Company

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