Re: device /dev/sda16 not exist?

[T <mlist4suntong@yahoo.com>]

On Mon, 04 Dec 2006 15:06:08 -0500, Greg Folkert wrote:

> On Sun, 2006-12-03 at 21:14 -0800, Carl Johnson wrote:
>> > 
>> > I just created a FAT32 partition using Win2k at /dev/sda16.
>> > 
>> > But when I tried to mount it under Linux, I get:
>> > 
>> > % mount /dev/sda16 /mnt/tmp1/
>> > mount: special device /dev/sda16 does not exist
>> > 
>> > why the device not exist? [...]
>> 
>> If you look at the device numbers for sda16 and sdb under linux I
>> think you will see why. [...]

1st of all, thank you both for the reply.

I'm using Testing (kernel 2.6.17 + udev), I don't see /dev/sdb in my
system. 

> It is part of the SCSI Standard. Even if it is an SATA drive which is an
> IDE drive in Windows, partition 16 is actually partition 0 on the next
> drive.

Both of you has hinted that sda16 should have device numbers as sdb. So I
gave it a try, as follows:

  $ ls -l /dev/sda /dev/sda1*
  brw-rw---- 1 root disk 8,  0 12-04 09:28 /dev/sda
  brw-rw---- 1 root disk 8,  1 12-04 09:28 /dev/sda1
  brw-rw---- 1 root disk 8, 10 12-04 14:28 /dev/sda10
  brw-rw---- 1 root disk 8, 11 12-04 14:28 /dev/sda11
  brw-rw---- 1 root disk 8, 12 12-04 09:28 /dev/sda12
  brw-rw---- 1 root disk 8, 13 12-04 14:28 /dev/sda13
  brw-rw---- 1 root disk 8, 14 12-04 14:29 /dev/sda14
  brw-rw---- 1 root disk 8, 15 12-04 14:29 /dev/sda15
  brw-rw---- 1 root disk 9,  0 12-04 16:49 /dev/sda16
                         ^^^^^

But that does not work:

$ mount /dev/sda16 /mnt/tmp1/
mount: /dev/sda16: can't read superblock

So is there any workaround so that I can access it? How come my Win2k can
accesse the sda16 without any problem?

FYI, I tried to created /dev/sda16 as the following, and it didn't work
either. 

  $ ls -l /dev/sda1*
  brw-rw---- 1 root disk 8,  1 12-03 12:31 /dev/sda1
  brw-rw---- 1 root disk 8, 10 12-03 17:31 /dev/sda10
  brw-rw---- 1 root disk 8, 11 12-03 17:31 /dev/sda11
  brw-rw---- 1 root disk 8, 12 12-03 12:31 /dev/sda12
  brw-rw---- 1 root disk 8, 13 12-03 17:31 /dev/sda13
  brw-rw---- 1 root disk 8, 14 12-03 17:31 /dev/sda14
  brw-rw---- 1 root disk 8, 15 12-03 17:31 /dev/sda15
  brw-rw---- 1 root disk 8, 16 12-03 18:08 /dev/sda16


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