On Tue, 20 Mar 2007, James Lockie wrote:

> My USB Flash drive pops up a "new medium has been detected" but my USB 
> hard does not (it used too but I upgraded something :-().
> 
> The dmesg output for my USB Flash drive:
> sd 6:0:0:0: Attached scsi removable disk sdg
> sd 6:0:0:0: Attached scsi generic sg6 type
> 
> The dmesg output for my USB hard drive drive:
> sd 7:0:0:0: Attached scsi disk sdg
> sd 7:0:0:0: Attached scsi generic sg6 type 0
> 
> Notice the hard drive is not detected as removable.

Because it isn't removable.  It's hot-pluggable.

"Removable" means you can easily change the media.  For example, an SD
flash card reader is a removable storage device.  So is a CD-ROM drive,
and so were the old Zip drives.

With your hard drive, the only way to change the media is to take a
screwdriver, open up the case, and swap out the physical drive unit for a
different one.  That's not so easy!  :-)

Alan Stern


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