Re: Problem mounting USB external drive

[Andrew Robinson <awrobinson@cox.net>]

Greg KH wrote:
> On Mon, May 03, 2004 at 12:09:14AM -0500, Andrew Robinson wrote:
> 
>>My question is this. What is the correct way within the hotplug 
>>framework to get a hot-plugged drive to mount automatically?
> 
> 
> Use something like devlabel.  It should handle it for you just fine.
> 

After studying the man page and playing with the program a bit, I cannot 
figure out how to get devlabel to work for me. When I plug in the drive, 
updfstab adds this entry to the /etc/fstab:

/dev/extdrive  /mnt/extdrive  auto  noauto,owner,kudzu 0 0

That is based on this entry in the /etc/updfstab.conf file:

device extdrive {
     match   hd "WD800JB-00FMA0"
     symlink true
}

The device symlink is this:

lrwxrwxrwx  1 root root 9 May  3 16:11 /dev/extdrive -> /dev/sda1

So to get a reference to the symlink in the fstab file, I have to 
configure updfstab to create that link. When I try to add this entry to 
devlabel, it complains that the symlink already exists. So I turned off 
the drive and tried to add the entry to devlabel, and it complained that 
the device file /dev/sda1 did not exist. The other way to add a devlabel 
entry is by UUID, but this drive does not seem to have one. When I run 
/usr/bin/partition_uuid /dev/sda1 (when /dev/sda1 exists), I get this 
response:

partition_uuid: partition does not appear to have a UUID

When I run /usr/bin/scsi_unique_id against the device file, I get this 
response:

model: WDC     WD800JB-00FMA0
page83: No page83 information found.
page80: No page80 information found.

I could be missing something (I never underestimate my ability to screw 
up), but it appears devlabel will not work for me in this instance. That 
gets me back to my original problem. When I plug in this disk drive, I 
get a valid entry in /etc/fstab. How do I mount that entry during the 
hotplug sequence?

Thanks!

Andrew Robinson




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