Renaming USB device
wblock at wonkity.com
Wed Nov 11 01:02:48 UTC 2009
On Wed, 11 Nov 2009, Polytropon wrote:
> On Tue, 10 Nov 2009 17:19:39 -0600, Peter Steele <psteele at maxiscale.com> wrote:
>> When a system has a USB drive present, the system typically
>> names it /dev/da0. However, if the system has SATA drives
>> hooked to an LSI controller, or if the system has SCSI drives,
>> the same drive prefix is used as is for the USB drive.
>> I realize this is something that likely has to be done in the
>> form of a kernel patch, but the question is can it be easily
> A kernel patch isn't needed and would surely break many working
> subsystems. An option is to use aliases through the means of
> /etc/devfs.conf, e. g.
> link da3 usbdisk0
That's fragile for dynamic devices; da3 might not be da3 next time it's
attached. You can create a link on device detection through devd.conf
using ln. It's also necessary to manually set owner and permissions,
since devfs.conf settings aren't applied. Thread about that here:
> or, if you want to enter the field of partition names in /etc/fstab,
> refer to the disks by their labels, so you don't need to know
> which da device a certain disk or USB stick actually is - it
> gives you independance from the order of detection by the
> system (first detected, first device name).
Labels are an excellent solution in this case.
-Warren Block * Rapid City, South Dakota USA
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