3581 Tape Drive Performance

[polani]

Dears,
we have a 3581 tape library with 3580 tape drive in it.
IBM Specs says that this tape drive give up speed up to
35MB/Sec.
Block size is zero. I copied 21178MB data on tape, it took 30 minutes and 56 seconds (11.41MB/sec) as per specification the speed should be 35MB/sec. We are getting 32% performance of the tape.

How we can improve the performance of Tape Drive

What are performance limiting factors in this regard....???




Here comes polani Once again!!!

P690 Certified Specailist
HACMP & AIX Certified Specailist
AIX & HACCMP Instructor

 

[MoshiachNow]

Hi,

Which command did you use for copying ?
Try dd to this tape and see if it helps to find the drive maximum.
Did you try same copy to another disk,just to verify your source disk can read faster then that ?
What is your scsi adapter settings ,where this drive is connected ? are they scsi2 (at leas) with all settings at max ?

Long live king Moshiach !

http://www.7for70.com/