Re: [gentoo-user] having problems getting burned cds to work

[Dale]

covici@××××××××××.com wrote:
> Dale <rdalek1967@×××××.com> wrote:
>
>> bitlord wrote:
>>> On Mon, 25 May 2015 22:27:39 -0400
>>> covici@××××××××××.com wrote:
>>>
>>>> Hi.  I am trying to burn an iso image to a cd (maybe its actually a
>>>> dvd disk), and it boots without any errors, and I can mount the iso
>>>> with the loop option, but if I try to mount the cd, it complains
>>>> about ufs file systems, and if I try to mount with -t iso9660, it
>>>> just says bad file type or bad superblock and the disk is unusable.
>>>> Nothing interesting in the logs, it just says the same about ufs and
>>>> nothing about iso9660.
>>>>
>>>> I am using cdrecord from cdrtools-3.01_alpha28 and I am running the
>>>> unstable version of gentoo.
>>>>
>>>> Any assistance would be appreciated.
>>>>
>>> Sorry, I know nothing about standards, optical media and filesystems,
>>> and don't understand how it works, once I had some issues with mounting
>>> optical media, also missing a filesystem which I fixed with enabling
>>> CONFIG_UDF_FS in kernel. I tried to read about UDF... before replying,
>>> but it is too much for me, if I understand it correctly it is not just
>>> what is written to the media but also how (different modes, for adding
>>> more data later ...), so may be some option while burning media that
>>> allows you to use free space left on the disk.
>>> If this is not useful just ignore it. ;-)
>>>
>>>
>> Same boat here.  From what I understand, if it is more than 2GBs, it
>> needs UDF support.  No idea if that applies to ISOs to tho.
> OK, I have a bit more info, I managed to burn the CD on another box and
> when I tried to mount it using this drive, it gave me in the logs
> May 26 02:41:59 ccs.covici.com kernel: end_request: I/O error, dev sr0,
> sector 942680
> May 26 02:41:59 ccs.covici.com kernel: Buffer I/O error on device sr0,
> logical block 117835
> May 26 02:42:00 ccs.covici.com kernel: end_request: I/O error, dev sr0,
> sector 942680
> May 26 02:42:00 ccs.covici.com kernel: Buffer I/O error on device sr0,
> logical block 117835
> but it did mount successfully! and I did a diff against the same iso
> mounted via -o loop and there were no differences.
>


There is a CD/DVD guru on here that will likely know what's going wrong,
whether it is a burn issue or a person in the keyboard issue.  Hang
tight.  I'm sure he will be along soon. 

Dale

:-)  :-)