[KLUG Members] mount and umount

[Bruce Smith]

> I've got a partition on an external HDD.
> This morning I mounted it (mount /dev/sdb3 /mnt/MAXext3) (as su) and
> worked with it (rsync) as ordinary user.  The rsync went fine. Then I
> switched back to root (su) and did umount /mnt/MAXext3. I initially got
> a message that /mnt/MAXext3 was busy. So I went back to ordinary user
> and cd'd away from there. Then returned to root and did the umount
> again. This time it seemed to work. I disconnected the HDD (USB2) and
> turned it off.
> 
> But now when I try to remount (mount /dev/sdb3 /mnt/MAXext3) I this
> error message: /dev/sdb3 does not exist.

Check messages & dmesg after you connect the drive.  It may be assigned
to a different SCSI controller the next time it's connected.  
(it may be /dev/sdc3 or /dev/sdd3 or /dev/sda3 or ... )

Also "fdisk -l" will show all hard drives connected.

 - BS