Re: BD-RE mount problem
On 06/08/12 11:51 PM, Gary Dale wrote:
I've been using BD-RE discs for backups on a Debian/Squeeze server for
a couple of years now. In the last week or so the backups have been
failing. I haven't modified my backup script so I thought about
possible hardware issues.
- I tried changing the BluRay writer but got the same problem.
- I tried new discs but got the same problem.
- I tried replacing the PCI-SATA controller that the machine needed
for the BluRay writer, but still got the same problem.
- the discs do formate correctly when I try dvd+rw-format -force=full
/dev/sr0
Finally, I tried an entirely different machine with a different model
of BluRay writer and I'm still getting the same problem.
This new machine has a different architecture (AMD64) and is running
Debian/Wheezy. Why am I getting the same problem?
I tried a new disc again, and this time formatted it through K3B
instead of using dvd+rw-format directly. It appeared to format
correctly - and no longer shows as an empty BD-RE disc when I insert
it - but still wouldn't mount.
All the mount attempts give exactly the same result:
# mount /media/dvd
mount: block device /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
The /etc/fstab entry is the same between the two machines:
/dev/sr0 /media/dvd udf user 0 0
I'm using Memorex BD-RE 2x discs. I've used an LG, ASUS and Pioneer
BluRay writer - the first two on the older machine. The ASUS and
Pioneer are brand new writers.
Any ideas?
Further to above, I did a file copy using K3B onto one of the BD-RE
discs that won't mount. K3B appeared to recognize that there was a udf
file system on the disc.
After it finished, it automounted as /media/cdrom0 with fs type iso9660.
However, I could also mount it as /media/dvd. Switching to root, I was
also able to mount it using
mount -t udf /dev/sr0 /media/dvd
Running mount shows that it is mounted as a udf file system.
However, I can't mount it -rw. It insists that the file system is read-only.
Also, I booted my computer from a USB key containing system rescue CD.
Again, the mount fails.
Here's a sequence I just tried:
root@transponder:/home/garydale# mkudffs /dev/sr0
Error opening device: Read-only file system
root@transponder:/home/garydale# mount /media/dvd
mount: block device /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
root@transponder:/home/garydale# mount /media/cdrom0
mount: block device /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
Afterward, I started up k3B and tried tools | format. The format dialog
has a pulldown for the media which shows "Complete Data BD-RE". It
wouldn't do a format - said it didn't need to do one - unless I do a
force, which I decided against.
I was able to burn a data project, after which the BluRay disc
automounts as /media/cdrom0 again. The mount command (no options) shows
it as:
/dev/sr0 on /media/cdrom0 type iso9660 (ro,nosuid,nodev,noexec,relatime)
I can also mount it as /media/dvd, where the mount command shows it
mounted as:
/dev/sr0 on /media/dvd type udf (ro,nosuid,nodev,noexec,relatime,utf8)
Trying to format the disk using dvd+rw-format is now giving me:
root@transponder:/home/garydale# dvd+rw-format -force=full /dev/sr0
* BD/DVD±RW/-RAM format utility by <appro@fy.chalmers.se>, version 7.1.
* 24.2GB BD media detected.
* formatting .:-[ FORMAT UNIT failed with SK=5h/INVALID FIELD IN
PARAMETER LIST]: Input/output error
I get the same if I try to -blank or -format as well.
And of course, the device shows as 100% full under df, since it seems to
really be an iso9660 formatted disc.
Here's the dvd+rw-mediainfo:
root@transponder:/home/garydale# dvd+rw-mediainfo /dev/sr0
INQUIRY: [PIONEER ][BD-RW BDR-207D][1.10]
GET [CURRENT] CONFIGURATION:
Mounted Media: 43h, BD-RE
Media ID: RITEK/BW1
Current Write Speed: 2.0x4495=8990KB/s
Write Speed #0: 2.0x4495=8990KB/s
Speed Descriptor#0: 00/11826175 R@2.0x4495=8990KB/s W@2.0x4495=8990KB/s
READ DISC INFORMATION:
Disc status: complete
Number of Sessions: 1
State of Last Session: complete
Number of Tracks: 1
READ FORMAT CAPACITIES:
formatted: 11826176*2048=24220008448
00h(3000): 11826176*2048=24220008448
30h(3000): 11826176*2048=24220008448
30h(5000): 11564032*2048=23683137536
30h(1000): 12088320*2048=24756879360
31h(800): 12219392*2048=25025314816
READ TRACK INFORMATION[#1]:
Track State: complete
Track Start Address: 0*2KB
Free Blocks: 0*2KB
Track Size: 11826176*2KB
FABRICATED TOC:
Track#1 : 14@0
Track#AA : 14@11826176
Multi-session Info: #1@0
READ CAPACITY: 11826176*2048=24220008448
I've been formatting DVD-RAM discs as UDF for years before switching to
BD-RE. I've always been able to mount them, erase files from them and
copy files to them without problems. Now it suddenly seems like none of
my BluRay equipped machines will let me do it.
Any ideas anyone?
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