Re: [SLUG] Which /dev/sd* device is which

From: Ron Youvan (ka4inm@tampabay.rr.com)
Date: Thu Oct 08 2009 - 15:49:34 EDT


> You now how externally connected drives and such, connected by USB show
> up as /dev/sda, /dev/sdb, etc? Is there a program somewhere in Linux
> which maps out what devices end up as /dev/sdX? lsusb gives voluminous
> details, but doesn't appear to give me a clue whether a device will end
> up as /dev/sda or /dev/sdg or what. Currently, if I plug an external USB
> hard drive in, I have to attempt to mount each /dev/sdX device until I
> find the one I just mounted.

   First:

#!/bin/bash
# /usr/local/bin/scsi
# by Ron KA4INM Youvan
if
   cdrecord -scanbus
then
   snd doorslam (audible prompt)
else
   snd error (audible prompt)
fi
# END /usr/local/bin/scsi

   Will tell you what is detected the on the various scsi and usb controllers including
all three device values. (controller, device select and which slot in multi slot players)

   Then:
   A program with a name like SCG is a series of scsi utilities that will give you more
scsi+usb information including testing the devices responses to the scsi commands.

   Also studying the log files will reveal what was discovered by the HAL as it was
plugged in.

-- 
    Ron  KA4INM - I'm proud to be Chuck's pop!
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