Restore /dev/hdd

Evans · 12-23-2006, 12:09 AM

I accidentally deleted /dev/hdd, I've tried to restore it use pdparm, but failed.

anyone know how to restore this block device, with pdparm? what command should I issue in shell?

MS3FGX · 12-23-2006, 12:39 AM

/dev/dvd is simply a symlink to whatever device is actually your DVD drive.

You should be able to find the device by doing something like "dmesg | grep DVD", which returns this on my system:

hdc: HL-DT-ST DVDRAM GSA-H10N, ATAPI CD/DVD-ROM drive

So now I know that /dev/hdc is my DVD drive, in which case I just need to do a simple link to restore it:

ln -s /dev/hdc /dev/dvd

You will need root permissions to create the link, by the way.

Evans · 12-23-2006, 01:05 AM

I mean I have deleted /dev/hdd, a block device, not /dev/dvd(a sysmbolic to /dev/hdd)

There is no /dev/dvd in my /dev. I created it before, but now it's been deleted it.

use mknod, I think, am just confused the last 2 args 22 64? what does it mean? any help advice would be appreciated!

liquidtenmilion · 12-23-2006, 07:12 AM

mknod is the way to go. Also, if you're using Udev, a simple reboot will solve the problem.

onebuck · 12-23-2006, 07:24 AM

Quote:

Originally Posted by Evans

I mean I have deleted /dev/hdd, a block device, not /dev/dvd(a sysmbolic to /dev/hdd)

There is no /dev/dvd in my /dev. I created it before, but now it's been deleted it.

use mknod, I think, am just confused the last 2 args 22 64? what does it mean? any help advice would be appreciated!

Hi,

You should 'man 1 mknod'. You could even reference, /usr/src/linux/Documentation/devices.txt to get the device information. The numbers you are confused about are the major,minor numbers for the device.

If you had done a google search, you would find something like the mknod reference. The next link on this page also lists the devices.

Alien Bob · 12-23-2006, 07:29 AM

Quote:

Originally Posted by Evans

use mknod, I think, am just confused the last 2 args 22 64? what does it mean? any help advice would be appreciated!

The two numbers are the major and minor device numbers for the block device.
Just run

Code:

mknod /dev/hdd b 22 64
chmod 660 /dev/hdd
chown root:disk /dev/hdd

to re-create the device node if you don't use udev.

Eric

Evans · 12-23-2006, 09:19 AM

Thanks. Problems solved here.

and

To all: "Merry Christmas!"