Hi, we observed a problem related to TDSM and SONY AIT drives. Sometimes we get the following error message on a Solaris connected to a tape library: ANR8302E I/O error on drive DRIVE01 (/dev/rmt/0mt) (OP=READ, CC=205, KEY=FF, ASC=FF, ASCQ=FF, SENSE=**NONE**, Description=SCSI adapter failure). We had three engineers from Sony here to check the situation. First we thought that the problem is related to SCSI and we attached a SCSI analyzer to log the bus activities. We were lucky to catch the situation when the error occured. In the trace we saw that in a DATA_IN_PHASE (= host READ) the AIT drive suddenly sets all SCSI signals inactive. The SONY engineers said that this is caused by a HW reset due to weak power supply. So we built in better power supplies but the problem is still there. In one case we were able to reproduce the problem with one special tape. But when we put the tape in another drive everything works fine. So I think that there might be a problem when a tape is written in one drive and read in another drive. >From my point of view there is a problem reading the media. Several times we observed that the AIT makes several retries to read data from the tape. Maybe this leads to a SCSI command timeout and the error message above. Has anyone similar problems? Any suggestions? I've heard that there is a new firmware 1.08 for the AIT drives but we havn't got anything from our disti. Thanks, Jochen Strohbeck
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