From: vikram sachdeva (vikram_dude@softhome.net)
Date: Mon Jun 03 2002 - 11:33:16 EDT
Hello
There is a performance issue while taking backup on TLZ10 DAT tape drive
in ES40.
Scenario:
System is ES40 with Tru64Unix V4.0G .Earlier TLZ10 DAT drive (internal)
was installed on separate SCSI controller int this server.
For some reasons we have to remove that SCSI controller. So we bought an
SBB TLZ10 DAT drive which we plugged in Disk
Shelve Bay (it is a hot pluggable drive like the SBB HDD ,blue in
color)In this Bay there are One Personality Module ,then
In Slot 0 one HDD ,Slot 1 one HDD Slot 2 is empty and in Slot 3 we have
installed Tape Drive.Rest of the slots are empty
After installing DAT in this bay ,the back up time is almost double .For
us it takes 18 hrs to finish the backup.
The Questions are
1. Why the backup time is doubled ?
2. Is there any way to reduce the backup time(like moving the tape drive
to lower slot i.e lower scsi id …. or by any other means)
3.Is there any utility (like iostat) form which we can find out the data
transfer rate for DAT tape drive.
Please help me ..
Regards
Vikram
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