From: Bill Verzal (BVerzal@KOMATSUNA.COM)
Date: Tue Aug 05 2003 - 13:50:19 EDT
What type of SCSI adapter is it on ?
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Bill Verzal
AIX Administrator, Komatsu America
(847) 970-3726 - direct
(847) 970-4184 - fax
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| | 08/05/2003 12:18 |
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| To: aix-l@Princeton.EDU |
| cc: |
| Subject: [Q] LTO tape drive performance issu ??? |
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We have LTO and DLT 7000 both on the same RS/6000 (AIX 4.3.3). The LTO
is IBM 3580 LTO drive. Normally LTO backup speed should around 10MB/sec
or higher. We have been test both DLT and LTO use "backvg", "mksysb" and
"storix". The DLT speed out perform than LTO. I need your suggestion why
LTO slow. The following is LTO setup parameters:
Tape Drive rmt2
Tape Drive type 3580
Tape Drive interface scsi
Description IBM 3580 Ultrium
Tape Drive
Status Available
Location 40-59-00-0,0
Parent adapter scsi5
Connection address 0,0
Block Size (0=Variable Length) [0]
+#
Use Hardware Compression on Tape yes
+
Use Autoloading Feature at End-of-Tape no
+
(IBM 3581 and IBM 3583 with single drive only)
Activate volume information logging no
+
Maximum size of log file (in # of entries) [500]
+#
Backward Space/Forward Space Record Mode SCSI
+
Use Immediate Bit in Rewind Commands no
+
Trailer Label Processing no
hanks.
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