I wrote a bunch of files to a backup DVD about two months ago and now
neither of my drives will read it. I get mount errors from "not a
directory" to something like "unrecognized file system type" and
so on,
usually after a really long wait and a notice about how the drive is
write-protected (duh).
Here's what happened most recently:
# mount /dev/hdc /mnt
mount: block device /dev/hdc is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/hdc,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg | tail -40
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: ide_intr: huh? expected NULL handler on exit
hdc: ATAPI reset complete
end_request: I/O error, dev hdc, sector 5118720
Buffer I/O error on device hdc, logical block 639840
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: ide_intr: huh? expected NULL handler on exit
hdc: ATAPI reset complete
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
ide: failed opcode was: unknown
hdc: ide_intr: huh? expected NULL handler on exit
hdc: ATAPI reset complete
end_request: I/O error, dev hdc, sector 64
isofs_fill_super: bread failed, dev=hdc, iso_blknum=16, block=16
Is there any way to read what's on this DVD (so I can back -up the files
again, hopefully with better results)?
Secondary related question: I noticed that my CentOS boot DVD does not
automount when I put it in either drive - why is that?
Thanks.
mhr
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Mark Hull-Richter wrote:> I wrote a bunch of files to a backup DVD about two months ago and now > neither of my drives will read it. I get mount errors from "not a > directory" to something like "unrecognized file system type" and so > on, usually after a really long wait and a notice about how the drive > is write-protected (duh). > > Here's what happened most recently: > > # mount /dev/hdc /mnt > mount: block device /dev/hdc is write-protected, mounting read-only > mount: wrong fs type, bad option, bad superblock on /dev/hdc, > missing codepage or other error > In some cases useful info is found in syslog - try > dmesg | tail or so > # dmesg | tail -40 > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: ide_intr: huh? expected NULL handler on exit > hdc: ATAPI reset complete > end_request: I/O error, dev hdc, sector 5118720 > Buffer I/O error on device hdc, logical block 639840 > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: ide_intr: huh? expected NULL handler on exit > hdc: ATAPI reset complete > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error } > hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 } > ide: failed opcode was: unknown > hdc: ide_intr: huh? expected NULL handler on exit > hdc: ATAPI reset complete > end_request: I/O error, dev hdc, sector 64 > isofs_fill_super: bread failed, dev=hdc, iso_blknum=16, block=16 > > Is there any way to read what's on this DVD (so I can back -up the > files again, hopefully with better results)? > > Secondary related question: I noticed that my CentOS boot DVD does > not automount when I put it in either drive - why is that? > > Thanks. > > mhr >I would suspect IDE cable, DVD drive, P/S, motherboard (assuming an on-board IDE channel) in that order. Don't overlook the drive's power connector, either. Do you have another machine you can try that boot DVD in? Can you read a CD in the failing drive? Have you been monkeying around with the kernel? Is the "DVD drive" really a DVD drive or is it only for CDs?
On 19 August 2007, "Mark Hull-Richter" <mhullrich at gmail.com> wrote: <snip>> Is there any way to read what's on this DVD (so I can back -up the > files again, hopefully with better results)? > > Secondary related question: I noticed that my CentOS boot DVD does > not automount when I put it in either drive - why is that?Mark: Welcome to the club! Your secondary question is related to my very recent thread: Re: [CentOS] Re: Automount configuration problem Johnny wrote, a few days ago, that gnome-mount handles this. Someone else had pointed out that it is *not* an automount problem. When I verified the gnome-mount package, it apparently is fine. I'm stuck with this problem on my daughters box. I can (usually) mount a DVD on her box manually, as root, but that's not something I am going to teach my 6 year old or my wife to do. I don't want them running as root. I am running the Firewall and SELinux (permissive mode) on my box and on daughters box. Works perfectly on my box. In my daughters box, in the same drive, it will mount a CD OK but not a DVD. If you find a solution for this, please post to the ML, because I'm sure we are not alone. There's probably a configuration file that isn't 100% correct or permissions incorrect, but I don't know which file. Lanny
On 19 August 2007, Robert <kerplop at sbcglobal.net> wrote: <snip>> I would suspect IDE cable, DVD drive, P/S, motherboard (assuming an > on-board IDE channel) in that order. Don't overlook the drive's power > connector, either.Robert: The DVD drive in my daughters box is a TEAC (which I've been told are problematic!). I will try to get Diagnostics for it, from the TEAC web site. That drive can automount CD's, without problems. I'll also check dmesg as Mark did on his box with the problem. Not trying to hijack Marks' thread. We have same problem. Lanny
On 19 August 2007, "Mark Hull-Richter" <mhullrich at gmail.com> wrote: <snip>> Is there any way to read what's on this DVD (so I can back -up the > files again, hopefully with better results)? > > Secondary related question: I noticed that my CentOS boot DVD does > not automount when I put it in either drive - why is that?Mark: Below are the last 4 lines of dmesg on my daughters box. I had the CentOS 5.0 Install DVD in the drive and the DVD icon was visible on the desktop, but, it had not automounted the DVD. I did not mount the DVD manually. Lanny> SELinux: initialized (dev autofs, type autofs), uses genfs_contexts > SELinux: initialized (dev autofs, type autofs), uses genfs_contexts > SELinux: initialized (dev autofs, type autofs), uses genfs_contexts > cdrom: This disc doesn't have any tracks I recognize! >
On Monday, 20 August 2007, "Mark Hull-Richter" <mhullrich at gmail.com> wrote:> Message: 55<snip>> If the icon is on your desktop, you should be able to access the DVD > through it. I think that means that gnome recognized the disk. I've > never seen a drive icon on the desktop and have it NOT appear in the > mounted disks in mount or df.Mark: What I see, when gnome-mount (?), or something else, is not working properly, is a generic icon for the DVD drive. If a DVD is mounted, properly, it will also show me the label for the DVD and work properly. So far, to get a DVD to mount properly in that drive, I need to do it manually. Always, if I put the CentOS install DVD and boot the box, it will mount properly. I believe this is a problem with a configuration file or permissions. Lanny