How to delete a device file created with mknod ?

[Thierry Doppler]

Hi,

For testing, I have mounted a VDisk on a HP-UX11.23 Server with mknod > vgcreate > newfs > mount ...

I want now to delete them.

I see it only if I start a ioscan -fnC disk :

disk 8 255/255/0/0.6 sdisk NO_HW DEVICE HSV100 HP
/dev/dsk/c11t0d6 /dev/rdsk/c11t0d6

Can I just delete the node-files with rm ?

Thanks you
Thierry

[Jeff Schussele · Accepted solution]

Hi Thierry,

rmsf is the command to use.
Be sure to delete both the character (/dev/rdsk)& block devices (/dev/dsk)

HTH,
Jeff

[Jeff_Traigle]

And you'll probably need to use "rmsf -H" to remove the hardware path so it stops showing up in ioscan completely also.

[baiju_3]

Hi ,

I think you have already exported the VG .
In that case do rm -fR /dev/VGName .


To remove device file use rmsf .


Thanks .
bl.

[Thierry Doppler]

Hi, Thanks you,

I removed the device files with rsmf, but the H/W Path appears always in the ioscan.

I tried without success
rmsf -H 255/255/0/0.6

Any idea?

Thierry

[James R. Ferguson]

Hi Thierry:

If the hardware has truly been removed, then when you reboot it will vanish from 'ioscan'.

Regards!

...JRF...

[Torsten.]

Don't forget to remove the related VG information too!

[Nguyen Anh Tien]

You can remove it by
#rmsf -H 255/255/0/0.6
and
#ioscan -fnC disk
to check it

[Thierry Doppler]

Hi M. Nguyen Anh Tien,

I do that exactly, but without success, my device appears always in the ioscan !?

Regards

Thierry

[Thomas J. Harrold]

You need the "-k" option to rmsf in order to remove the device from the running kernel.

rmsf -k -H

-tjh

[Thierry Doppler]

Hi Thomas,

With the -k is not better. The first time I saw again the device files !

sapdev //#>ioscan -fnC disk
...
disk 8 255/255/0/0.6 sdisk NO_HW DEVICE HSV100 HP

sapdev //#>rmsf -k -H 255/255/0/0.6
sapdev //#>ioscan -fnC disk
Class I H/W Path Driver S/W State H/W Type Description
============================================================================
...disk 8 255/255/0/0.6 sdisk NO_HW DEVICE HSV100 HP
/dev/dsk/c11t0d6 /dev/rdsk/c11t0d6
sapdev //#>rmsf -H 255/255/0/0.6

sapdev //#>ioscan -fnC disk
Class I H/W Path Driver S/W State H/W Type Description
============================================================================
disk 8 255/255/0/0.6 sdisk NO_HW DEVICE HSV100 HP


Perhaps a reboot, but the server boot if a disk is marked "NO_HW" ?

Thanks you

Thierry

[Jeff Schussele]

Hi (again) Thierry,

Yes - follow JRF's advice & it'll go away.
And no, it'll boot just fine as I assume that's not a boot disk.

Rgds,
Jeff