12 Replies Latest reply: Jan 13, 2013 10:27 PM by m_malinowski RSS

    Oracle Linux DVD wont mount

    Jimbo
      Hi, I am trying to mount my Oracle Linux 6-2 bootable disk that I installed from in order to manually copy off the packages directory onto the server ( to create a local YUM repository )

      I have checked the DVD in my windows laptop and can see the packages folder ( so I know the DVD is iso9660 format ) however when I do the following on my linux server -

      mkdir /cdrom
      mount -t iso9660 -o ro /dev/cdrom /cdrom

      I get the following -
      mount: wrong fs type, bad option, bad superblock on /dev/sr0,
      missing codepage or other error
      In some cases useful info is found in syslog - try
      dmesg | tail or so

      when I do dmesg | tail I see

      isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16
      attempt to access beyond end of device

      any idea of how to resolve this ?
      Jim
        • 1. Re: Oracle Linux DVD wont mount
          Dude!
          Just because you can see the DVD content under Windows does not necessarily mean it is ISO9660. It could also be UDF or some other PC hybrid. You can can right click on the DVD in Windows, choose Properties and it should show you the File System format in the General Tab.
          • 2. Re: Oracle Linux DVD wont mount
            Jimbo
            File System format is CDFS in windows ( I believe equates to ISO9960 ? ) - which is what I kind of knew, given I have used this DVD to actually do the install on my linux server ( I was just wanting to mount it, so I could copy off the packages directory onto the server itself )

            Jim
            • 3. Re: Oracle Linux DVD wont mount
              Dude!
              Yes, that should work.

              Well, are the Linux server and your Windows computer the same machine?
              Did you use the same DVD in the same Linux server before?
              Is it erasable DVD media?

              When I mount a DVD I usually just use e.g. "mount /dev/cdrom /cdrom" without specifying any options or file system and it usually works fine. The mount command examines the partition header and should automatically detect the files system. Can you try if this give the same error?
              • 4. Re: Oracle Linux DVD wont mount
                Jimbo
                The windows and linux server are 2 different physical servers.

                When I simply try mount /dev/cdrom /cdrom on the linux server it complains with
                you must specify the filesystem type

                When I try mount /dev/cdrom -t iso9660 /cdrom it complains with
                wrong fs type, bad superblock on /dev/sr0 ... ( as I originally reported on my posting )

                I am using a bog standard recordable DVD and I used this to install the server just a couple of days ago - stange indeed !

                Jim
                • 5. Re: Oracle Linux DVD wont mount
                  Dude!
                  Sounds to me like the DVD in the Linux server is broken or cannot handle the type of DVD media you are using.
                  • 6. Re: Oracle Linux DVD wont mount
                    Jimbo
                    I'll burn the packages folder to a new DVD and see if I can mount this.
                    Jim
                    • 7. Re: Oracle Linux DVD wont mount
                      Jimbo
                      Are DVD drives covered by ISO9660 ? I saw a hit that said not all DVD drives are ( I gues this could be why it is complaining about the FS type ) ?
                      However the hit did not offer an alternative mount command.
                      I will burn the packages to a CDROM to see if that makes a difference
                      Jim
                      • 8. Re: Oracle Linux DVD wont mount
                        Dude!
                        The format should work. You might have incompatible media, e.g. DVD+/-, defective burning software or defective DVD burner.
                        • 9. Re: Oracle Linux DVD wont mount
                          Jimbo
                          Checked the drive on my windows server ( where I burnt the DVD ) and on my Linux Server. Both have the same DVD formats written on them.
                          I burned the DVD using the native burning software of Windows 7 Professional.

                          I tried to mount an empty CD on my linux server and got the same error message ( reported in my earlier post ) as when trying to mount a DVD. Remember this is the same drive ( and DVD for that matter ) that I did the original Linux install from

                          In desperation I even tried to reinstall Linux 6-2 on my server - however the installer does not seem to fire up from the DVD drive ( even though I have checked that the BIOS has the drive at the first source in the boot order ) - this is the exact same DVD I did the original install from on this server. When I put other bootable DVD's in the drive it picks them up ok.

                          It is almost as if it is refusing to boot from the Linux 6-2 DVD because this is already installed on the server !

                          any thoughts
                          Jim
                          • 10. Re: Oracle Linux DVD wont mount
                            Dude!
                            It is almost as if it is refusing to boot from the Linux 6-2 DVD because this is already installed on the server !
                            No, that's not possible.

                            Something could be wrong in the burning process. I'd suggest to check the following:

                            http://windows.microsoft.com/en-US/windows7/Burn-a-CD-or-DVD-from-an-ISO-file

                            Also make sure the ISO you have downloaded is not corrupted. - wasn't this a problem before?

                            You can compare the SHA-1 sum from the where you downloaded the file with your image file.

                            http://support.microsoft.com/kb/841290

                            Btw, your problem is probably not Linux, but Windows. ;-)
                            • 11. Re: Oracle Linux DVD wont mount
                              Jimbo
                              I burned from the same ISO image again but this time I used a freeware burner app ( instead of Windows 7 native burner ) and just for good measure I used an external USB DVD drive instead of my internal.

                              Recently had my windows laptop forceably upgraded to Windows 7 in my absence, and as part of this helpful upgrade it screwed my Nero 6 install ( hence why I was using Windows 7 burner ! )

                              Seems to have made a difference. So it wasn't the ISO image itself but either the drive or Windows 7 - I think your appreciation of Windows may be spot on !!

                              thanks,
                              Jim
                              • 12. Re: Oracle Linux DVD wont mount
                                m_malinowski
                                If you don't know type you can always use mount -t auto . Always works for me