Re: [tlug] Trouble with external USB hard disk

[David Bernat <dbernat@example.com>]

Nguyen Vu Hung wrote:

> Opps. I forget that you can't access /etc at this time. So please try:
> 
> #Replace ext with the file system you are using( if you have set )
> sudo mount -t ext3 /dev/sdb1 /etc
> sudo mount -t ext3 /dev/sdb5 /root
> 
> I am not sure if you have to mkdir -p /etc /root

root@example.com:~# fdisk -l

Disk /dev/sda: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00019bf7

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1       38164   306552298+  83  Linux
/dev/sda2           38165       38913     6016342+   5  Extended
/dev/sda5           38165       38913     6016311   82  Linux swap / Solaris

Disk /dev/sdb: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x44634187

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       38913   312568641    c  W95 FAT32 (LBA)

root@example.com:~# mount -t W95 FAT32 /dev/sdb1 /etc
Usage: mount -V                 : print version
       mount -h                 : print this help
       mount                    : list mounted filesystems
       mount -l                 : idem, including volume labels
So far the informational part. Next the mounting.
The command is `mount [-t fstype] something somewhere'.
Details found in /etc/fstab may be omitted.
       mount -a [-t|-O] ...     : mount all stuff from /etc/fstab
       mount device             : mount device at the known place
       mount directory          : mount known device here
       mount -t type dev dir    : ordinary mount command
Note that one does not really mount a device, one mounts
a filesystem (of the given type) found on the device.
One can also mount an already visible directory tree elsewhere:
       mount --bind olddir newdir
or move a subtree:
       mount --move olddir newdir
One can change the type of mount containing the directory dir:
       mount --make-shared dir
       mount --make-slave dir
       mount --make-private dir
       mount --make-unbindable dir
One can change the type of all the mounts in a mount subtree
containing the directory dir:
       mount --make-rshared dir
       mount --make-rslave dir
       mount --make-rprivate dir
       mount --make-runbindable dir
A device can be given by name, say /dev/hda1 or /dev/cdrom,
or by label, using  -L label  or by uuid, using  -U uuid .
Other options: [-nfFrsvw] [-o options] [-p passwdfd].
For many more details, say  man 8 mount .

I still get "permissions denied".

> Btw, is there any reason for installing / into /dev/sda but /etc and
> /home to /dev/sdb?

Dunno. This is how Kubuntu set up the disks.