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Cisco Bug: CSCtd90345 - AIX Hosts Report "Overlapping Commands Attempted" When Using IOA

Last Modified

Mar 16, 2016

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases

4.2(1)

Description (partial)

Symptom:
Hosts running TSM experience read/write errors with IOA Tape acceleration is enabled.

Conditions:
TSM is always sending UNTAGGED commands and IOA sends its own commands
such as READ, SPACE6, REWIND, etc. for Read Acceleration as SIMPLE commands.
Under this condition of a mixed of UNTAGGED and SIMPLE commands an overlapping
ocurrs due to out-of-order commands and Tape Drive sends a Reject.

Workaround(s): Resolved in 4.2(3a) and 5.0(1a).
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