Well, it looks as if my problems weren't solved after all. I took out a
Plextor PX-W4012TA and re-installed me cherished Plextor PX-W1610A---the
latter burns at 1X, which produces glorious sounding CDs. Anyway, with
this change, my problems have re-appeared. See the dmesg excerpt below.
The short version is:
ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Now, at the end, I get:
scsi scan: 96 byte inquiry failed. Consider BLIST_INQUIRY_36 for
this device
Is this worth trying? If so, how do I try it?
It's possible, I suppose, that there's something wrong with this old
drive. I have another one, I believe, at work, so I'll bring it home and
see if it does better. But I wasn't having these sorts of problems
before upgrading to Fedora 8 and so libata, so I'm doubtful that's it.
Anyway, thanks to everyone here for their patience and willingness to help.
Richard
=====
pata_amd 0000:00:0d.0: version 0.3.10
PCI: Setting latency timer of device 0000:00:0d.0 to 64
scsi6 : pata_amd
scsi7 : pata_amd
ata7: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xfc00 irq 14
ata8: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xfc08 irq 15
ata7.00: ATAPI: PLEXTOR CD-R PX-W1610A, 1.05, max MWDMA2
ata7.00: configured for MWDMA2
ata8: port disabled. ignoring.
ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata7.00: cmd a0/01:00:00:60:00/00:00:00:00:00/a0 tag 0 dma 96 in
cdb 12 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00
res 40/00:02:00:24:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
ata7.00: status: { DRDY }
ata7: soft resetting link
ata7.00: configured for MWDMA2
ata7: EH complete
ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata7.00: cmd a0/01:00:00:60:00/00:00:00:00:00/a0 tag 0 dma 96 in
cdb 12 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00
res 40/00:02:00:24:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
ata7.00: status: { DRDY }
ata7: soft resetting link
ata7.00: configured for MWDMA2
ata7: EH complete
ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata7.00: cmd a0/01:00:00:60:00/00:00:00:00:00/a0 tag 0 dma 96 in
cdb 12 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00
res 40/00:02:00:24:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
ata7.00: status: { DRDY }
ata7: soft resetting link
ata7.00: configured for MWDMA2
ata7: EH complete
ata7.00: limiting speed to MWDMA1:PIO4
ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata7.00: cmd a0/01:00:00:60:00/00:00:00:00:00/a0 tag 0 dma 96 in
cdb 12 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00
res 40/00:02:00:24:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
ata7.00: status: { DRDY }
ata7: soft resetting link
ata7.00: configured for MWDMA1
ata7: EH complete
scsi scan: 96 byte inquiry failed. Consider BLIST_INQUIRY_36 for this
device
scsi 6:0:0:0: CD-ROM PLEXTOR CD-R PX-W1610A 1.05 PQ: 0 ANSI: 5
etc
etc
and then it just plain won't work, at least to write....
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