mount errors on /dev/sr0 (cd-rw)

mount errors on /dev/sr0 (cd-rw)

[jb]

Hi,
this is tested on Fedora 20
util-linux.i686        2.24.2-1.fc20         @update

# mount -t auto /dev/sr0 /media/
mount: /dev/sr0 is write-protected, mounting read-only
mount: /dev/sr0: can't read superblock
#

# dmesg -T
[Mon Sep  1 17:35:40 2014] sr 0:0:1:0: [sr0]  
[Mon Sep  1 17:35:40 2014] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[Mon Sep  1 17:35:40 2014] sr 0:0:1:0: [sr0]  
[Mon Sep  1 17:35:40 2014] Sense Key : Illegal Request [current] 
[Mon Sep  1 17:35:40 2014] sr 0:0:1:0: [sr0]  
[Mon Sep  1 17:35:40 2014] Add. Sense: Logical block address out of range
[Mon Sep  1 17:35:40 2014] sr 0:0:1:0: [sr0] CDB: 
[Mon Sep  1 17:35:40 2014] Read(10): 28 00 00 00 00 00 00 00 01 00
[Mon Sep  1 17:35:40 2014] end_request: I/O error, dev sr0, sector 0
[Mon Sep  1 17:35:40 2014] Buffer I/O error on device sr0, logical block 0
[Mon Sep  1 17:35:40 2014] sr 0:0:1:0: [sr0]  
[Mon Sep  1 17:35:40 2014] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
...
[Mon Sep  1 17:35:43 2014] sr 0:0:1:0: [sr0] CDB: 
[Mon Sep  1 17:35:43 2014] Read(10): 28 00 00 00 00 00 00 00 01 00
[Mon Sep  1 17:35:43 2014] FAT-fs (sr0): unable to read boot sector
#

What is the last line about ??? FAT-fs on sr0 ???

# mount -t iso9660 /dev/sr0 /media/
mount: /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.
#

# dmesg -T
...
[Mon Sep  1 17:55:15 2014] sr 0:0:1:0: [sr0]  
[Mon Sep  1 17:55:15 2014] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[Mon Sep  1 17:55:15 2014] sr 0:0:1:0: [sr0]  
[Mon Sep  1 17:55:15 2014] Sense Key : Illegal Request [current] 
[Mon Sep  1 17:55:15 2014] sr 0:0:1:0: [sr0]  
[Mon Sep  1 17:55:15 2014] Add. Sense: Logical block address out of range
[Mon Sep  1 17:55:15 2014] sr 0:0:1:0: [sr0] CDB: 
[Mon Sep  1 17:55:15 2014] Read(10): 28 00 00 00 00 10 00 00 01 00
[Mon Sep  1 17:55:15 2014] blk_update_request: 59 callbacks suppressed
[Mon Sep  1 17:55:15 2014] end_request: I/O error, dev sr0, sector 64
[Mon Sep  1 17:55:15 2014] isofs_fill_super: bread failed, dev=sr0,
iso_blknum=16, block=16
#

I see this problem historically present in many distros.

# isoinfo -d -i test.iso 
CD-ROM is in ISO 9660 format
System id: LINUX
Volume id: CDROM
Volume set id: 
Publisher id: 
Data preparer id: 
Application id: GENISOIMAGE ISO 9660/HFS FILESYSTEM CREATOR (C) 1993
E.YOUNGDALE (C) 1997-2006 J.PEARSON/J.SCHILLING (C) 2006-2007 CDRKIT TEAM
Copyright File id: 
Abstract File id: 
Bibliographic File id: 
Volume set size is: 1
Volume set sequence number is: 1
Logical block size is: 2048
Volume size is: 183
Joliet with UCS level 3 found
Rock Ridge signatures version 1 found
# 

# isoinfo -l -i test.iso 

Directory listing of /
d---------   0    0    0            2048 Sep  1 2014 [     28 02]  . 
d---------   0    0    0            2048 Sep  1 2014 [     28 02]  .. 
----------   0    0    0             121 Sep  1 2014 [     31 00] 
DISK_WAR.TXT;1 
----------   0    0    0             144 Sep  1 2014 [     32 00] 
HDPARM_T.OUT;1 
# 

jb

Re: mount errors on /dev/sr0 (cd-rw)

[Dale R. Worley]

> From: jb <jb.1234abcd@gmail.com>

> # mount -t auto /dev/sr0 /media/
> mount: /dev/sr0 is write-protected, mounting read-only
> mount: /dev/sr0: can't read superblock
> #

What condition was the CD in when you inserted it into the drive?
(You haven't told us the full sequence of actions you've taken, only
listed the output of some programs.)

Dale

Re: mount errors on /dev/sr0 (cd-rw)

[jb]

Dale R. Worley <worley@...> writes:

> 
> > From: jb <jb.1234abcd@...>
> 
> > # mount -t auto /dev/sr0 /media/
> > mount: /dev/sr0 is write-protected, mounting read-only
> > mount: /dev/sr0: can't read superblock
> > #
> 
> What condition was the CD in when you inserted it into the drive?
> (You haven't told us the full sequence of actions you've taken, only
> listed the output of some programs.)
> 
> Dale

I just realized that wodim fooled me (it burned cd-rw without any indication
of a problem, but actually the cd-rw is useless - there are multiple bug
reports for wodim).

jb