Gentoo Archives: gentoo-user

From: Alan Mackenzie <acm@×××.de>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] mount: "special device /dev/hdc does not exist". What does this mean?
Date: Sat, 19 Jul 2008 21:41:50
Message-Id: 20080719214114.GA896@muc.de
In Reply to: Re: [gentoo-user] mount: "special device /dev/hdc does not exist". What does this mean? by Daniel Pielmeier
1 Hi, Daniel
2
3 On Sat, Jul 19, 2008 at 09:11:09PM +0200, Daniel Pielmeier wrote:
4 > Alan Mackenzie schrieb:
5 > >Hi, Gentoo?
6
7 > >I've a newly installed system, now working with my own special
8 > >optimiesed keyboard layout. :-)
9
10 > >However, I can't access my DVD drives. I know at least one of them
11 > >works, because I installed Gentoo from it.
12
13 > >When I do
14
15 > > mount -tiso9660 /dev/hdc /cdrom
16
17 > >, it comes back with "special device /dev/hdc does not exist". And yes,
18 > >there was a CD in the drive, and /cdrom exists.
19
20 > Do you mean
21
22 > mount -t iso9660 /dev/hdc /cdrom
23
24 Maybe. Is that different?
25
26 > >What does "special device" mean here? Does it mean the physcial
27 > >hardware, the controller chip, the directory entry /dev/hdc, the driver
28 > >in the kernel, or what? What is "special" about my DVD writer?
29
30 > It means the directory entry /dev/hdc.
31
32 OK.
33
34 > >Well, to answer some of my questions, I was missing a /dev/hdc, so I
35 > >made one with
36
37 > ># mknod /dev/hdc b 22 0
38
39 > >. This didn't help one iota. I had a look at dmesg, but there was no
40 > >mention of hdc in it. (It did mention hdg, hdh, where my main hard
41 > >drives are (don't ask!)).
42
43 > Can't resist what is on hd{a-f}
44
45 Nothing on hd[abef], a DVD writer on hdc and a DVD reader on hdd. My PC
46 was built in 2001, and the 2 "onboard" IDE ports are "ordinary" IDE,
47 whereas the two IDE ports "stuck on the side" do UDMA66.
48
49 > >My kernel is an up to date linux-2.6.25-gentoo-r6. I _think_ it's got
50 > >all the needed options set in the configuration. Can anybody suggest
51 > >how to get my system to recognise my DVD drives?
52
53 > >Thanks in advance!
54
55
56 > What kind of DVD writer do you have maybe it is sata or scsi, and it
57 > wiil appear under /dev/srX or /dev/sgX. Or if you use the new libata
58 > library in the kernel even IDE devices are under /dev/srX or /dev/sgX.
59
60 No, the box is no longer young, and contains no SATA or SCSI bits at all.
61 I'm just going away to see if I've got any /dev/s[gr]X on the box. ....
62
63 No, I've got no /dev/s[gr]X at all.
64
65 Could it be that the kernel has looked at hd[ab], found nothing there,
66 and therefore decided "it's not worth the bother even looking at
67 hd[cd]"?
68
69 --
70 Alan Mackenzie (Nuremberg, Germany).

Replies

Subject Author
Re: [gentoo-user] mount: "special device /dev/hdc does not exist". What does this mean? Daniel Pielmeier <daniel.pielmeier@××××××××××.com>