Re: UUIDs (and devfs and major/minor numbers)

Brandon S. Allbery KF8NH (allbery@kf8nh.apk.net)
Sun, 20 Jun 1999 08:40:44 -0400

In message <19990619193141.A6097@chelm.cs.nmt.edu>, yodaiken@chelm.cs.nmt.edu w
rites:
+-----
| I see the problem with systems that have a couple of i/o busses and
| add and remove storage devices from them
| and there is a related problem that also touches pcmcia/usb where
| devices can be plugged and unplugged. For both problems we need some
| sort of dynamic naming that makes sense and for the pcmcia/usb we need
| a nice way to find drivers to load. Is there some other issue here
| that I don't understand or is that it?
+--->8

SCSI (and IDE?) devices get named in the order they're detected, without
regard for their physical addresses. So if you have disks on scsi0 id0 lun0
and scsi0 id4 lun0 they get named /dev/sda and /dev/sdb; if you add a disk on
scsi0 id2, it becomes /dev/sdb and the old sdb is suddenly /dev/sdc.

-- 
brandon s. allbery	[os/2][linux][solaris][japh]	 allbery@kf8nh.apk.net
system administrator	     [WAY too many hats]	   allbery@ece.cmu.edu
carnegie mellon / electrical and computer engineering			 KF8NH
     We are Linux. Resistance is an indication that you missed the point.


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