Writing to an LTO tape in a 3583 library that is fibre attached may produce ANR8302E message with data phase errors.
The following error is logged in the Tivoli Storage Manager server activity log :
ANR8302E I/O error on drive DRIVE3 (\\.\tape0) (OP=WRITE, Error Number=1235, CC=0, KEY=0B, ASC=4B, ASCQ=00
The setting for the Speed on the SAN Data Gateway/switch is incorrect.
Diagnosing the problem
Refer to the Tivoli Storage Manager descriptions of I/O codes for information about the KEY, ASC and ASCQ values. In this case, a combination of ASC=4B, ASCQ=00 means "Data phase error".
Resolving the problem
This type of error is corrected by setting the speed on the ports for the SAN Data Gateway / Switch to the maximum of 1GB.