"logical unit communication failure" c2scan NEC ND-4550A 1.07
Greeting,
running a C2 scan on an audio CD in a NEC ND-4550A (FW rev. 1.07) causes
errors like these, where a C2 scan of the same CD in a Plextor
PX-W4824TA (FW rev. 1.06) on the same ATA cable succeeds.
Read speed: 7056 kB/s (CD 40x, DVD 5x).
Write speed: 2822 kB/s (CD 16x, DVD 2x).
Capacity: 202390 Blocks = 404780 kBytes = 395 MBytes = 414 prMB
Sectorsize: 2048 Bytes
Copy from SCSI (1,0,0) disk to file '/dev/null'
end: 202390
readcd: Success. read_cd: scsi sendcmd: no error
CDB: BE 00 00 00 00 31 00 00 31 FA 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 04 00 00 00 00 0A 00 00 00 00 08 00 00 00
Sense Key: 0x4 Hardware Error, Segment 0
Sense Code: 0x08 Qual 0x00 (logical unit communication failure) Fru 0x0
Sense flags: Blk 0 (not valid)
resid: 123748
cmd finished after 6.422s timeout 40s
readcd: Success. Cannot read source disk
readcd: Retrying from sector 49.
Other operations, like reading with cdda2wav, appear to work properly on
both drives.
What is the interpretation of "logical unit communication failure" in
this context?
--
Matthias Andree
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