Re: [tlug] Trouble with external USB hard disk: /dev/scd0 versus /dev/sdc

[jep200404 <jep200404@example.com>]

David Bernat wrote:

> Information from disk and file systems, external USB hard disk not attached
> 
> sda1 292.4GB partition mount point /
> sda2 1KB partition
> sda5 5.7GB swap file mount point none
> 
> sdb1 burner DVD-RAM mount point /etc

On Mon, 20 Oct 2008 15:30:00 +0900, David Bernat <dbernat@example.com> wrote:

> sdb is the external USB hard disk
> sdc is the internal DVD drive

Are today's sdb1 DVD-RAM drive and yesterday's sdc DVD drive the same drive? 

On Mon, 20 Oct 2008 10:31:35 -0400, I wrote:

> I wonder if the drive names (/dev/sda, /dev/sdb, ...) 
> got reordered in the upgrade. 

... or just in plugging them in, in different orders, 
or plugging them in different ports. 

That sdb was a USB hard drive before and is now a DVD-RAM drive, 
reinforces that wonder. 

I have a bad feeling about drives being plugged in and 
removed. One time they can be sdb, another time sdc. 
This can make a mess of fstab, making one want to lock 
things down with filesystem labels (e2label) or UUIDs, 
or messing with udev rules. Right now you have a wiggly 
bowl of warm Jello. 

Back to what you wrote today: 

> sdb1 burner DVD-RAM mount point /etc

I'm surprised that a DVD drive appears as an /dev/sdx 
instead of /dev/scdx. 
Do you have DVD-RAM media in your DVD drive? 
If so, as what filesystem have you mounted the DVD-RAM media? 
Is it writable? 

What drive is /dev/scd0 in your system? 
Do you have another optical drive?