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vanchutr
Joined: 05 Aug 2006
Posts: 419
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 Posted: Wed 15 Apr 2009, 23:16 Post subject:
 fatdog 112 can't read dvd |
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I can't use pmount to mount dvd reader
Error: Can't mount /dev/sr0
Then I can't read a data dvd. I use well this data dvd in other distro (e.g turbopup, 4.20 deepthough)
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jamesbond
Joined: 26 Feb 2007
Posts: 1573
Location: The Blue Marble
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| Posted: Thu 16 Apr 2009, 00:19 Post subject:
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I'm running fatdog 112 when posting this (running in ram) and I can mount no problem. Open terminal and type this command, and post any error messages you see:
| Code: | | mount /dev/dvd /mnt/data |
If this works (no error message), you can unmount using
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Fatdog64, Slacko and Puppeee user. Puppy user since 2.13
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vanchutr
Joined: 05 Aug 2006
Posts: 419
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| Posted: Thu 16 Apr 2009, 01:48 Post subject:
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@jamesbond
I use your suggestion:
| Code: |
mount /dev/dvd /mnt/data
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I'd got this message
| Code: |
mount: No medium found
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(I think that there's no medium in dvd reader
I put the dvd in the reader i repeat this command then now I get this
| Code: |
mount: block device /dev/dvd is write-protected, mounting read-only
mount: /dev/dvd: can't read superblock
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NB: If i use Pmount I'd got: An read message box with this message "ERROR: unable to mount sr0"
Thank you
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jamesbond
Joined: 26 Feb 2007
Posts: 1573
Location: The Blue Marble
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| Posted: Thu 16 Apr 2009, 02:26 Post subject:
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This
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mount: block device /dev/dvd is write-protected, mounting read-only
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is ok, since we're dealing with a read-only device here.
| Code: |
mount: /dev/dvd: can't read superblock
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is more worrying.
Can you try with this
| Code: |
mount -t iso9660 /dev/dvd /mnt/data
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and see what you've got?
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Fatdog64, Slacko and Puppeee user. Puppy user since 2.13
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vanchutr
Joined: 05 Aug 2006
Posts: 419
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| Posted: Thu 16 Apr 2009, 03:55 Post subject:
mount dvd success |
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@jamesbond
I' got the same message with
| Code: |
mount -t iso9660 /dev/dvd /mnt/data
mount block device /dev/dvd is write-protected, mounting read-only
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But, now Aha Hah I can read my dvd data.
Success! Thank you jamesbond. But I want to know this cause by pmount bug or another one?
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jamesbond
Joined: 26 Feb 2007
Posts: 1573
Location: The Blue Marble
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| Posted: Thu 16 Apr 2009, 04:20 Post subject:
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Glad that it helps.
I think the issue is the system somehow detects the filesystem on dvd wrongly. CD and DVD usually use iso9660 filesystem, and DVD sometimes uses UDF. The error message you get is "can't read superblock" - this means mount is trying to read your dvd as if it's an ext2/ext3 filesystem and of course it will fail.
I don't think it's pmount or mount issue. pmount uses probedisk/probepart/probedisk2 to detect the filesystem that exist on disk. If you can post the output of
| Code: |
probedisk /dev/dvd
probedisk2 /dev/dvd
probepart /dev/dvd
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then we can probably see where it goes wrong.
Anyway - how was this dvd created? Did you use pburn? is it multisession? other than iso9660, is there any other filesystem on it (udf and iso9660 can co-exists...) etc.
Remember to unmount your dvd otherwise you won't be able to eject it 
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Fatdog64, Slacko and Puppeee user. Puppy user since 2.13
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vanchutr
Joined: 05 Aug 2006
Posts: 419
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| Posted: Thu 16 Apr 2009, 05:04 Post subject:
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@jamesbond
Thank you a lot
This is the messages I'd got:
| Code: |
probedisk /dev/dvd
/dev/sda|Direct-Access|ATA Maxtor 6L040P0
/dev/sr0|cdrom|SONY DVD RW DRU-830A
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| Code: |
probedisk2/dev/dvd
/dev/sda|Direct-Access|ATA Maxtor 6L040P0
/dev/sr0|cdrom|SONY DVD RW DRU-830A
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| Code: |
probepart
/dev/sda1|vfat|10402496
/dev/sda2|none|2
/dev/sda5|vfat|12292496
/dev/sda6|vfat|12292496
/dev/sda7|vfat|12277376
/dev/sda8|vfat|12292496
/dev/sda9|ext2|19459376
/dev/sda10|swap|1012976
/dev/sr0|none|2097150
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I use k3b to burn the DVD with option "DAO" (but may be this is wrong option - I choice DAO but k3b notice that it will use SAO - Info from K3B) - an bootable .iso file - This dvd boot good on my compu.
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jamesbond
Joined: 26 Feb 2007
Posts: 1573
Location: The Blue Marble
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| Posted: Thu 16 Apr 2009, 07:16 Post subject:
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Well, sometime things happens.
Are you doing the probedisk thing with the dvd in your drive? I see that all the /dev/sr0 shows "none". Can you do it with the dvd in your drive?
On the other hand, if this is the result with your dvd in your drive, then that's very very odd...
Well, k3b ought to be ok ... k3b, pburn, they all are GUI front-ends to the same program to burn dvd (growisofs, I think). Both DAO and SAO should be all-right.
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Fatdog64, Slacko and Puppeee user. Puppy user since 2.13
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vanchutr
Joined: 05 Aug 2006
Posts: 419
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| Posted: Thu 16 Apr 2009, 09:44 Post subject:
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I use command "probedisk - probedisk2" with the DVD Disk in the DVD reader and these are the same messages:
| Code: |
# probedisk
/dev/sda|Direct-Access|ATA Maxtor 6L040P0
/dev/sr0|cdrom|SONY DVD RW DRU-830A
# probedisk2
/dev/sda|drive|ATA Maxtor 6L040P0
/dev/sr0|optical|SONY DVD RW DRU-830A
#
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Now I continue with:
| Code: |
# mount -t iso9660 /dev/dvd /mnt/data
mount: block device /dev/dvd is write-protected, mounting read-only
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and then check if DVD was mounted
| Code: |
# ls /mnt/data
411ux 420smpxuv cups_gutenp new_inst_viet syslinux3.73
412lhsc 420whdeepsc exefile newyearpupsc turbopupux
412lhux 420whdeepux fonts_vn newyearpupux usb_win_utily
412mipupux boot grldr ppupbarryux zip_rar_arc
413nopux boot.catalog grub4dos2 remasterscripts
420puppiessc c406uv HBCD sfsfile
420puppiesxv c412sc kieuvan406 spup
420smpsc c412ux mk_multi_cd surfpupux
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And I re-check with:
| Code: |
# probedisk
/dev/sda|Direct-Access|ATA Maxtor 6L040P0
/dev/sr0|cdrom|SONY DVD RW DRU-830A
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Any instructions. TK jamesbond
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jamesbond
Joined: 26 Feb 2007
Posts: 1573
Location: The Blue Marble
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| Posted: Thu 16 Apr 2009, 09:51 Post subject:
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My mistake 
I should have asked you to do the probepart, with the disc inside, but when it is NOT mounted. Let's see what is says.
cheers!
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Fatdog64, Slacko and Puppeee user. Puppy user since 2.13
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vanchutr
Joined: 05 Aug 2006
Posts: 419
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| Posted: Thu 16 Apr 2009, 20:09 Post subject:
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@jamesbond
This is the info of probepart
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# probepart
/dev/sda1|vfat|10402496
/dev/sda2|none|2
/dev/sda5|vfat|12292496
/dev/sda6|vfat|12292496
/dev/sda7|vfat|12277376
/dev/sda8|vfat|12292496
/dev/sda9|ext2|19459376
/dev/sda10|swap|1012976
/dev/sr0|iso9660|7736768
#
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Ah, fatdog understands the dvd is an iso9660.
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jamesbond
Joined: 26 Feb 2007
Posts: 1573
Location: The Blue Marble
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| Posted: Thu 16 Apr 2009, 23:34 Post subject:
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 which is very odd, because then pmount should recognise it as such and mount it with the "-t iso9660" parameter .... may be it is a pmount bug. Odd
I'll see what I can do, but no promises - there are a lot of things going on under the hood (pmount is Barry's baby along with the entire pup_event front-end/back-end event notification system). Somewhere along the line the communication must have been broken.
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Fatdog64, Slacko and Puppeee user. Puppy user since 2.13
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jlst
Joined: 23 Nov 2012
Posts: 2
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| Posted: Fri 23 Nov 2012, 14:23 Post subject:
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Thanks for the information, I was having trouble mounting a data dvd, (I'm using Precise Puppy 5.4.1
This was the error message: "Error: unable to mount sr0"
And (in my case) this was the the solution:
| Code: | | mount -t udf /dev/dvd /mnt/data |
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