Re: Mounting disks

[Paul Morgan <paulswm@earthlink.net>]

James Hosken wrote:

> Quoting Paul Morgan <paulswm@earthlink.net>:
>
>  
>
> > On Sat, 29 Nov 2003 11:46:13 +0000, James Hosken wrote:
> >
> >    
> >
> > > Quoting Carl Fink <carl@fink.to>:
> > >
> > >      
> > >
> > > > On Wed, Nov 26, 2003 at 07:03:57PM +0000, James Hosken wrote:
> > > >
> > > >        
> > > >
> > > > > mount -t ext2 /dev/hdb5 /mnt/old-disk/
> > > > >
> > > > > and I get the error
> > > > >
> > > > > mount: wrong fs type, bad option, bad superblock on /dev/hdb5,
> > > > >       or too many mounted file systems
> > > > > I'm pritty sure that it is the right file systems, I was using Mandrake
> > > > >          
> > > > 8.1
> > > >        
> > > >
> > > > > standard setup. I think the disk may be a bit dodgy. Is there any thing
> > > > >          
> > > > that I
> > > >        
> > > >
> > > > > can do? I know there are several superblocks for this soer of thing.
> > > > >          
> > > > Well, starting from the end:  how many filesystems do you have mounted?
> > > >
> > > > Run fdisk or cfdisk on /dev/hdb and see what partition type /dev/hdb5
> > > > really is.
> > > >
> > > > If it's ext2, run e2fsck on it.
> > > >        
> > > Thanks for the reply, it is hdb8 that I'm really intrested in rather than
> > >      
> > hdb5
> >    
> >
> > > Here's he result from fdisk
> > >
> > > Disk /dev/hdb: 41.1 GB, 41174138880 bytes
> > > 255 heads, 63 sectors/track, 5005 cylinders
> > > Units = cylinders of 16065 * 512 = 8225280 bytes
> > >
> > >   Device Boot      Start         End      Blocks   Id  System
> > > /dev/hdb1   *         117         510     3164805    b  W95 FAT32
> > > /dev/hdb2             511        5005    36106087+   f  W95 Ext'd (LBA)
> > > /dev/hdb5             511         573      506016   83  Linux
> > > /dev/hdb6             574         604      248976   82  Linux swap
> > > /dev/hdb7             605         986     3068383+  83  Linux
> > > /dev/hdb8             987        5005    32282586   83  Linux
> > >
> > >
> > > Here is the result from fsck /dev/hdb8
> > >
> > > fsck 1.35-WIP (21-Aug-2003)
> > > e2fsck 1.35-WIP (21-Aug-2003)
> > > fsck.ext2: Attempt to read block from filesystem resulted in short read
> > >      
> > while tr
> >    
> >
> > > ying to open /dev/hdb8
> > > Could this be a zero-length partition?
> > >
> > >
> > >
> > > I have run fsck on hdb5 and hdb7 as well and they come back with the same
> > >      
> > error.
> >    
> >
> > > Any surgestions?
> > > Thanks
> > >      
> > James,
> >
> > What happens if you try to mount any of these without specifying a type? 
> > And, if mount is successful, what did it mount it as?
> >
> > Example - what's the output from this?
> >
> > mount /dev/hdb5 /mnt/old-disk/
> > mount | grep /mnt/old-disk
> >    
>
>
> I have tried  that before, here the output
>
> fork:/etc/apache# mount /dev/hdb5 /mnt/old-disk/
> /dev/hdb5: Input/output error
> mount: mount point /mnt/old-disk/ does not exist
>
>
>
> I know that there are multiple superblock incase one gets knackered, would using
> one of these help? How do I do that?
> Is there a way of finding the superblocks?
>
> James
>
>  
James,

You must have mistakenly sent this to me rather than the list.

You could run mke2fs -n ... which would tell you where it would put the 
superblocks if it built the filesystem (-n tells it not to actually do 
it).  Then you could try giving one of those superblock values to mount. 
However, as it was built on a different system and we don't know the 
parameters mke2fs used to build it, there are no guarantees, but it's 
worth a try.  See "man mke2fs".

I assume that sfdisk thinks that your partition table is OK.  I mean, I 
assume that you are sure that the issue is the filesystem.

--
....................paul

"They made us many promises, more than I can remember, but they never
kept but one: they promised to take our land, and they took it."

- Chief Red Cloud (Mahpiua Luta) of the Oglala Sioux