[4063] in linux-scsi channel archive
Medium Error?
daemon@ATHENA.MIT.EDU (Dave Wreski)
Wed Jun 3 20:33:07 1998
Date: Wed, 3 Jun 1998 20:34:31 -0400 (EDT)
From: Dave Wreski <dave@nic.com>
To: linux-scsi <linux-scsi@vger.rutgers.edu>
Medium Error.. Hmm.. [terrible pun omitted]
Anyway, I made a few home-grown CDROMs, and thought I'd use dd to check
them before I deleted the original source from my hard disk, and I receive
the following messages at completion:
Jun 3 21:26:09 gossamer kernel: scsi0: MEDIUM ERROR on channel 0, id 6,
lun 0, CDB: 0x08 04 3c 81 03 00
Jun 3 21:26:09 gossamer kernel: Current error sr0b:00: sns = f0 3
Jun 3 21:26:09 gossamer kernel: ASC=15 ASCQ= 0
Jun 3 21:26:09 gossamer kernel: Raw sense data:0xf0 0x00 0x03 0x00 0x04
0x3c 0x82 0x0a 0x00 0x00 0x00 0x00 0x15 0x00 0x00 0x00
Jun 3 21:26:09 gossamer kernel: CD-ROM I/O error: dev 0b:00, sector
1110536
I tried it with a few CDROMs that were purchased, and these messages do
not appear. Does it have something to do with the end of the media, or
are these errors causing dd to abort? It always reports the same number
of records in as records out:
[root@gossamer /root]# dd bs=1k if=/dev/sr0 of=/dev/null
555268+0 records in
555268+0 records out
Hmm.. perhaps a larger block size would be more efficient, or I should
calculate the exact number of blocks to read, using the `count' argument?
Thanks much,
Dave Wreski
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