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Old 08-08-2006, 06:41 AM   #1
chaosbear
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Registered: Sep 2005
Location: London, UK
Distribution: FC5
Posts: 2

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why has udev swapped /dev/hdc and /dev/hdd ?


Following some cdrom reading problems, I have found that udev seems to have swapped my hdd and hdc, causing immense system problems :-

Code:
[root@freja udev]# cdrecord -scanbus
Cdrecord-Clone 2.01.01a03-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2005 Jörg Schilling
NOTE: This version contains the OSS DVD extensions for cdrtools and thus may
      have bugs related to DVD issues that are not present in the original
      cdrtools. Please send bug reports or support requests to

      not be bothered with problems in this version.
scsidev: 'ATA'
devname: 'ATA'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
cdrecord: Warning: using inofficial libscg transport code version (schily - Red Hat-scsi-linux-sg.c-1.85-RH '@(#)scsi-linux-sg.c        1.85 05/05/16 Copyright 1997 J. Schilling').
scsibus1:
        1,0,0   100) 'PHILIPS ' 'PCRW5232P       ' 'P2.2' Removable CD-ROM
        1,1,0   101) 'SAMSUNG ' 'DVD-ROM SD-612S ' 'SB05' Removable CD-ROM
        1,2,0   102) *
        1,3,0   103) *
        1,4,0   104) *
        1,5,0   105) *
        1,6,0   106) *
        1,7,0   107) *
Code:
[root@freja udev]# ls -l /dev/cd*
lrwxrwxrwx 1 root root 3 Aug  8 09:28 /dev/cdrom -> hdc
lrwxrwxrwx 1 root root 3 Aug  8 09:28 /dev/cdrom-hdc -> hdc
lrwxrwxrwx 1 root root 3 Aug  8 09:28 /dev/cdrom-hdd -> hdd
lrwxrwxrwx 1 root root 3 Aug  8 09:28 /dev/cdrw -> hdc
lrwxrwxrwx 1 root root 3 Aug  8 09:28 /dev/cdrw-hdc -> hdc
lrwxrwxrwx 1 root root 3 Aug  8 09:28 /dev/cdwriter -> hdc
lrwxrwxrwx 1 root root 3 Aug  8 09:28 /dev/cdwriter-hdc -> hdc
However, if I issue a
Code:
eject /dev/hdc
The wrong drive (DVD) pops out !!! The converse is also true where ejecting hdd pops out the CDR.

I suspect that this is causing some of the problems I am encountering with this machine and would appreciate any help in figuring out what is going wrong or where I should look.

I have tried rolling back to an earlier kernel (2.6.15-1.2054_FC5) but have the same issues.

Physically, the CDR drive has been set to master & the DVD to slave (which should end up as hdc and hdd respectively) but something is amiss and they seem to have been unaccountably swapped.

This also means (?) that I cannot mount or burn on the cdrom drive which is becoming an issue.
 
Old 08-08-2006, 11:02 PM   #2
syg00
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Registered: Aug 2003
Location: Australia
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Maybe having a read of this will help.
 
Old 08-09-2006, 04:23 AM   #3
chaosbear
LQ Newbie
 
Registered: Sep 2005
Location: London, UK
Distribution: FC5
Posts: 2

Original Poster
Rep: Reputation: 0
Problem Fixed

After spending most of the night rebuilding and rebooting, the problem seems to have gone away; no clue why.
 
  


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