The ASC/ASCQ code (0C00) indicates a write error, and bytes 16-17 of the
sense data contain the Fault Symptom Code (3118), which indicates the
drive lost servo tracking.  There are a number of FSCs related to servo
tracking, which has been a nagging problem with both 3590Bs and 3590Es.
We're been running D0IA_4F3 microcode on our 3590Bs and D0ID_226 on our
3590Es for a while with much better (although not perfect) error
handling and recovery than prior releases.

There is a database maintained by IBM/Tucson that your local CEs can
reference for descriptions of FSCs, which has been very helpful for us
in determining whether the problem is hardware, microcode, or media.

>
> >From time to time I see errors like this. It looks to be a write error on a
> tape. Sometimes the tape is put in a read only status sometimes not, in this
> case it did. Can anyone give me an idea if this is just one of those things,
> could it be dirty heads, anything? I only have two drives at the moment and
> I've seen it on both.
>
> 05/22/00 08:35:37     ANR8302E I/O error on drive RMT1 (/dev/rmt1)
> (OP=WRITE,
>                        CC=0, KEY=03, ASC=0C, ASCQ=00,
> SENSE=F0.00.03.01.50.01.4-
>
> C.58.00.00.00.00.0C.00.FE.0A.31.18.40.01.00.03.01.31.08.-
>
> 0D.C7.4B.E6.14.0A.00.10.35.42.10.01.33.12.01.80.33.54.FF-
>
> .07.00.00.00.6A.72.00.4C.A5.06.00.00.00.FF.00.00.6A.44.0-
>                        3.00, Description=An undetermined error has
> occurred).
>                        Refer to Appendix B in the 'Messages' manual for
>
>                        recommended action.
>
> 05/22/00 08:35:37     ANR8359E Media fault detected on 3590 volume U00254 in
>
>                        drive RMT1 (/dev/rmt1) of library 3494LIB.
>
> Geoff Gill
> NT Systems Support Engineer
> Computer Systems Group
> E-Mail:   gillg AT saic DOT com
> Phone:  (858) 826-4062
> Pager:   (888) 997-9614
>

--
Tom Bell                                    tom.bell AT westgeo DOT com
Tom Bell                                    tom.bell AT westgeo DOT com
Western Geophysical                         office:     (713) 689-2203
10001 Richmond, Room 3705                   fax:        (713) 689-2758
Houston, TX  77042                          pager:      (713) 415-0419

If it were easy, anyone could do it.