we are having similar problems.
Config is Win2K w/ TSM4.2.3.1 with IBM3583 and 6-LTO drives, SCSI direct
attached.

We get the same issues with all media mfg.'s we have used (IBM, HP, Imation,
Maxell).

I have a few Veritas BackupEXEC machines that use LTO.  I have had a couple
of tapes
where BUE indicates that the chip in the tape has gone bad.  I am wondering
if some of
the perceived errors are related to the chip.  I have never seen an
indication on any tape
in our TSM box that there is a problem with the RFID chip.

More suggestions?

> -----Original Message-----
> From: Krzysztof Kus [SMTP:kkus AT OPTIX DOT PL]
> Sent: Tuesday, October 14, 2003 10:23 AM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      I/O errors
>
> Hello!
>
> My configuration is:
> p6H0 with AIX 4.3.3 ML 9
> TSM 5.1.6.1
> HBA 6228
> bridge FC<->SCSI 3250
> drives HP-Ultrium1
>
>  From time to time randomly I get error messages in errpt ADSM_DD_LOG2.
>  From the sense data I can see that the problem is with a medium. In the
> TSM actlog there are messages "I/O error...", and the tape is marked as
> read-only (I don't include error logs because I want my mail to be read).
>
> I've checked almost everything from tapes, microcode on the drives
> through optical fibers to AIX and TSM (there is no errors on the bridge).
>
> Has anybody have similar adventure with TSM? I'm opened for every
> suggestions. Next week I'm going to connect my library and drives
> directly through the SCSI (this week I strongly suspect the HBA) :)
>
>
> Regards.
>
> --
>
> --== KKus ==--