Help Required

[rajeshbahl]

I am facing some problems.Can someone help...

1.One of the filesystems in sco openserver has corrupted. The corruption is to a very bad extent. The data in this filesystem is very important.Is there any method by which we can mount the filesystem forcibly?

2.On a server running sco openserver 5.0.6, the restoration from DAT was very very slow.Accidently one of our collegaues changed the device entry in /etc/default/tar file.At no.8, instead of /dev/rct0 (which was default),he changed it to /dev/rStp0. After changing this device, the speed of restore increased tremendously. What is the difference between these two devices i.e.rct0 and rStp0?

Is there any "official" nomenclature for device major/minor numbers (I need some information on the codes for major/minor numbers i.e. what and how they represent different devices and possibly how to manipulate them)?


Thanks In Advance
Rajesh K. Bahl

 

[pcunix]

No difference at all if the major minor numbers were the same.

See

http://pcunix.com/Unixart/devices.html

Tony Lawrence
SCO Unix/Linux Resources

http://pcunix.com

tony@pcunix.com

 

[rajeshbahl]

Thanks Tony. But why the difference of speed? Any clue?
Also any suggestion regarding my first query?

Regards
Rajesh K. Bahl

 

[pcunix]

If you told us what the major minor numbers are for each device I might be able to give you a clue.

Tony Lawrence
SCO Unix/Linux Resources

http://pcunix.com

tony@pcunix.com

 

[pcunix]

As to the ability to mount a damaged fs, you can try mounting it read only, but that probably won't help. That's usually only useful in the case of a failing drive where writes drive it insane.

I assume you tried fsk -ofull -y ?

Tony Lawrence
SCO Unix/Linux Resources

http://pcunix.com

tony@pcunix.com

 

[rajeshbahl]

1.The major and minor numbers of both the devices(rStp0 and rct0) are the same i.e. 46,0.
Still the "boost" in speed is indigestible.
Any suggestion on where from we can have the idea about what a particular major number (if possible the complete list of devices)represents?

2. I tried fsck -ofull -y. Sadly did not help. Someone suggested (although he never knew what was the command)to mount it forcefully before we declare that it can-not be repaired.

Regards
Rajesh K. Bahl


Regards
Rajesh K. Bahl

 

[pcunix]

man HW tape Tony Lawrence
SCO Unix/Linux Resources

http://pcunix.com

tony@pcunix.com