I have been using the theory that compression was something one enabled on      the tape drive itself, as in

Devctrl 7,enable,enable
Meaning turn on compression and tape eject at end of job......

Regards,

John Pitman
-----Original Message-----
From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On Behalf Of joseph dolliver
Sent: Saturday, 22 August 2009 12:33 AM
To: [log in to unmask]
Subject: [HP3000-L] QUESTION USING THE COMPRESS OPTION IN BACKUPS

is using the compress=high going to shave time off full backups?

My guess is it depends on the system. That said, I have a low end
500-100-140 and am using compress=low and my system has 3gb memory and I am
using DDS3


one of my clients has a DLT4 or 7, not sure and is running an
N-Class-100-750 and the compress=high shaved 20 % off the back up
time...when changing it from LOW



Does this sound correct?

I am guessing that it depends on cpu size and the amount of memory to come
up with the best compress option..



Thanks,

Joe

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