booting trouble

[Phil Pinkerton]

From the live CD try sudo fsck -y /dev/sda2  or in my case it was sudo
fsck -y /dev/hda1

then re-boot.

I had a similar problem and that fixes it, down side it keeps happening
usually when I am doing something like a find and a lot of disk i/o. Do
not know if it will or not. it might help someone.



Michaël Van Dorpe wrote:
> Nice weekend to everyone on the mailing list!
>
> I screwed up my OSX -  Feisty dual boot, using rEFIT, quite badly on
> my Intel iMac. I
> now can only boot OSX, or a live cd. I can see that my Ubuntu
> partition is still there, but the pinguin icon in the rEFIT menu got
> replaced with a generic 'legacy OS' (sic) icon. Activating that
> results in a black screen saying "Missing operating system."
>
> Using 'sudo fdisk -l'  on a live cd, I have learned that I have the
> following partitions:
> sda1          EFI/GPT
> sda2 boot Unknown
> sda3          EFI Fat-12/16/32
> sda4          Linux swap
>
> I believe that the 'unknown'  is the OSX partition, while sda3 is the
> Feisty partition.
>
> I tried some commands to get more information from the terminal within
> OSX:
>
> michael:~ michael$ diskutil list
> /dev/disk0
>    #:                   type name               size      identifier
>    0:  GUID_partition_scheme                    *232.9 GB disk0
>    1:                    EFI                    200.0 MB  disk0s1
>    2:              Apple_HFS Macintosh HD       116.0 GB  disk0s2
>    3:                    EFI                    111.9 GB  disk0s3
>    4:             Linux Swap                    4.8 GB    disk0s4
> [snip: info on the live cd]
>
> michael:~ michael$ sudo fdisk /dev/rdisk0
> Password:
> Disk: /dev/rdisk0       geometry: 30401/255/63 [488397168 sectors]
> Signature: 0xAA55
>          Starting       Ending
> #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
> ------------------------------------------------------------------------
> 1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID>
> *2: AF 1023 254  63 - 1023 254  63 [    409640 -  243269632] HFS+
> 3: EF 1023 254  63 - 1023 254  63 [ 243679272 -  234687501] <Unknown ID>
> 4: 82 1023 254  63 - 1023 254  63 [ 478366773 -   10030362] Linux swap
>
> Thanks for explaining me what to do next, what information I should
> gather, or just explain what the above information means... Of course,
> the important thing is that I can always recover the data on that
> partition, but I prefer 'Ubuntu the operating system' rather than
> 'Ubuntu the partition' ;-)
>
> Thanks.
>
> Oh, and if you want to know how all this happened... Well, I should
> have documented that, but I didn't. It all started when I forced my
> computer to shut down after something had gone wrong during an
> upgrade.
>
> Michael