[KLUG Members] mounting removable devices

[Bruce Damkoehler]

I have a couple of machines that I can try it on, and different distros 
installed. I just need to get some spare time. I am trying to get a 
project out the door on Friday and right now spare time is in short supply.

Mike Williams wrote:
> It must be somewhat consistent between distros because I use Gentoo 
> and I found the instructions for doing it on an Ubuntu forum.  The 
> string of numbers seems to be taken directly from the hardware, as a 
> model # and possibly firmware revision, so I suspect you would get the 
> same data on any other machine, but I don't currently have another 
> linux box up to try it on.  Since the number might be derived from 
> firmware revision, I would be really careful using this method for 
> identifying drives in an array.  If you replace a drive, the name 
> might change!
> I doubt it matters if the numbers are consistent between machines as 
> long as they are consistent between boots, since I can't imagine a 
> scenario where you'd be moving part of /etc/fstab between machines.
> Another interesting thing, which I just noticed, is that there are two 
> sets of numbers on my machine that reference the same hard drive.  My 
> main drive is SATA, and it's showing up as both 
> ata-WDC_WD2500KS-00MJB0_WD-WCANK2094657  and 
> scsi-SATA_WDC_WD2500KS-00_WD-WCANK2094657.  I suppose it makes sense, 
> since SATA uses the ATA command set, but linux treats it more like a 
> SCSI drive and calls it sda not hda.  I didn't think to mention this 
> before, but the files in the directories under /dev/disk/ are not the 
> actual device files, but soft links to the files in /dev.
> Bruce Damkoehler wrote:
>>
>> Is it consistent from machine to machine? Have you tried it on 
>> different distros?
>>
>> I will certainly give it a try.
>>
>> How did you find out about it?
>>
>>
>>
>> Mike Williams wrote:
>>> I think I finally found a clean way around the problem of removable
>>> devices and their mountpoints.  I have a USB thumbdrive and an external
>>> ieee1394 hard drive that sometimes don't mount properly.  I had some
>>> success using the LABEL flag in fstab (they're both FAT32 filesystem),
>>> and it sort of worked, but umount wouldn't unmount it as a regular
>>> user.  It would give me an error that /etc/mtab disagreed with
>>> /etc/fstab or some such.  A better way is to mount it as the proper
>>> entry in /dev/disk/by-id.  Aside from a really ugly-looking fstab file
>>> (/dev/disk/by-id/ieee1394-0010100300061861:0:0-part1 is much more
>>> cumbersome than /dev/sdc1), it seems to work fine.
>>>
>>>
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>>>
>>
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