LTO-4 - Some Drives Are Seen Under Lib Admin at 1GB, Others Are Seen on the Same Switch at 4GB

(Doc ID 1307170.1)

Last updated on SEPTEMBER 06, 2017

Applies to:

IBM LTO4 Tape Drive - Version Not Applicable and later
Information in this document applies to any platform.

Symptoms

Some drives are seen under lib admin at 1GB, others are seen on the same switch at 4GB.
(Library at 3.17.03   Drives at 91VF)

Changes

Recommended to have all drive set with loop_id=126 for soft addressing. Also check the switch port link speed and topology settings.

Port loop_id already set to 126 for all drives, switch ports in auto-neg (same results when forced to 4GB).

Have seen similar issues with switch firmware.

Cause

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