topic Re: Command for ceck bad sector in Operating System - HP-UX

Command for ceck bad sector

Diszy Galex — Fri, 23 May 2008 16:47:55 GMT

Dear All...

How can i know, my disk have a bad sector or not?? I use RP3440 with HP-UX version 1.

What command to sow the bad sector??

Thank' Befor

Re: Command for ceck bad sector

Torsten. — Fri, 23 May 2008 17:06:38 GMT

I know there is a tool, but it is password protected.

Try to "dd" the disk, if it normal ends, there should be no problem, e.g.

# dd if=/dev/rdsk/c0t5d0 of=/dev/null bs=1024k

Re: Command for ceck bad sector

James R. Ferguson — Fri, 23 May 2008 17:07:15 GMT

Hi:

# dd if=/dev/rdsk/cXtYdZ of=/dev/null bs=1024k; echo $?

...this will examine (read) the entire physical volume so depending on its size this could take considerable time. Note the use of the raw device file to bypass the LVM and buffer cache layers.

If there are no errors, the number of records in and out will be the same and the command's exit status will be zero (0).

Regards!

...JRF...

Re: Command for ceck bad sector

Jeeshan — Fri, 23 May 2008 17:17:54 GMT

Hi Diszy

You can use mediainit command.

There is no need to use this now a days and with modern discs and sizes it most certainly can render discs usless to hpux.
Modern discs have all there bad sectors sorted at manufacture so a mediainit should'nt be needed as it basically just initalzes the inbuilt controller self tests.

Re: Command for ceck bad sector

Torsten. — Fri, 23 May 2008 17:28:30 GMT

But be careful - "dd" will only read, "mediainit" will overwrite everything.