topic Re: dd command in Operating System - HP-UX

dd command

nagarjuna reddy — Fri, 26 Nov 2010 06:14:27 GMT

Hi,

I typed the following command few minutes ago, what would be the result of the command. pls help me, i am not a sys admin.

#dd if=/dev/dsk/c1t1d0s2 of=/dev/null bs=4k

thanks & regards,
nagarjuna

Re: dd command

VK2COT — Fri, 26 Nov 2010 06:17:26 GMT

Hello,

The command will copy raw blocks fro
your disk into "bit bucket" and
it will take a very long time due to your small
block size of 4 KB.

In other words, you are, in a very simple
way, checking if slice 2 of a boot disk
has some read errors.

Cheers,

VK2COT

Re: dd command

nagarjuna reddy — Fri, 26 Nov 2010 06:19:55 GMT

hi,

can i stop the dd process now,

what will happen then?

Re: dd command

Shibin_2 — Fri, 26 Nov 2010 06:26:44 GMT

Yes you can break it, nothing will happen for this.

But you wont' get the expected result.

Looks like your disk has problem.

Re: dd command

nagarjuna reddy — Fri, 26 Nov 2010 06:30:15 GMT

thanks for the reply,

can i kill the process or is there any way??
pls suggest me.

thnks

Re: dd command

nagarjuna reddy — Fri, 26 Nov 2010 06:53:43 GMT

hi,

when i kill the dd process it is not going to kill.

pls. suggest me for further step. its very urgent,

Re: dd command

Johnson Punniyalingam — Fri, 26 Nov 2010 07:02:40 GMT

you can press ctrl c to break it ,

try if it helps , otherwise

Post command output.

ps -ef |grep -i dd

Re: dd command

Shibin_2 — Fri, 26 Nov 2010 07:17:16 GMT

When you press Ctrl+c it breaks. If that doesn't work, open a new session, search for the PID of dd command.

ps -ef |grep -i dd

then kill it.

kill -9

Re: dd command

nagarjuna reddy — Fri, 26 Nov 2010 07:24:29 GMT

hi,

it did not worked, and the server is running very slow,

its a prodution server

Re: dd command

Shibin_2 — Fri, 26 Nov 2010 07:29:52 GMT

>> it did not worked, and the server is running very slow,

What? Ctrl+c or kill command?

Re: dd command

rariasn — Fri, 26 Nov 2010 08:47:59 GMT

Hi:

disk c1t1d0 probably is damaged.

grep -i error /var/adm/syslog/syslog

rgs

Re: dd command

nagarjuna reddy — Fri, 26 Nov 2010 09:12:18 GMT

thanks,

both are not worked.

i rebooted the server,

now working fine

regards,
nagarjuna

Re: dd command

Shibin_2 — Fri, 26 Nov 2010 09:31:23 GMT

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