pvcreate help

[Chris Fadrowski]

I am planning on recovering a system at a hot site. they have smaller luns than i have here on setup. i would like to know if there is a way to PVCREATE all 55 devices at one time with a wildcard command. i just don't know the proper command. I want to avoid doing a pvcreate -f /dev/rdsk/cxtxdx individually for each disk.

[Ross Zubritski]

Make yourself a quick for loop as follows:

/dev/dsk/c#t#d#
/dev/dsk/c#t#d#

Put all the disks in a file called x in this example and execute the following

for i in `cat x`
do
pvcreate -f $i
done

enjoy.

RZ

[James R. Ferguson]

Hi Chris:

How about:

# for DISK in `ls /dev/rdsk`
> do
> pvcreate -f /dev/rdsk/${DISK}
> done

Regards!

...JRF...

[James R. Ferguson]

Hi Chris:

How about:

# for DISK in `ls /dev/rdsk`
> do
> pvcreate -f /dev/rdsk/${DISK}
> done

Regards!

...JRF...

[Ross Zubritski]

Dang JRF, always a step ahead.... ;)

RZ

[Chris Fadrowski]

but will this trash my disks on vg00 that were created after the make_tape_recovery is complete? I will be doing this most likely after vg00 has been make_recovered.

[Chris Fadrowski]

but will this trash my disks on vg00 that were created after the make_tape_recovery is complete? I will be doing this most likely after vg00 has been make_recovered.

[Ian Dennison_1]

How about,

for i in $(cat /tmp/diskfile)
do
export j=`echo $i |sed 's/rdsk/dsk/g'`
export LNCOUNT=`strings /etc/lvmtab |grep $j |wc -l`
if (( $LNCOUNT < 1 ))
then
pvcreate -f $i
fi
done

This way, you do not trash your boot disk or any other existing disk (Just a thought)

NOTE: Will not work on system that can view disks from other systems (SAN, FC10, etc)

Share and Enjoy! Ian

[Ian Dennison_1]

First line of loop should be

for i in $(ls /dev/rdsk)

Sorry, rehashed the thing halfway through. Ian

[Ian Dennison_1]

First line of loop should be

for i in $(ls /dev/rdsk)

Sorry, rehashed the thing halfway through. Ian

[James R. Ferguson]

Hi (again) Chris:

Ooops, you want to exclude your boot disk! Therefore, once you know its disk (e.g. c0t6d0) do:

#!/usr/bin/sh
for DISK in `ls dev/rdsk`
do
[ "${DISK}" != c0t6d0 ] && pvcreate -f /dev/rdsk/${DISK}
done

Regards!

...JRF...

[James R. Ferguson · Accepted solution]

Hi (again) Chris:

Ooops, you want to exclude your boot disk! Therefore, once you know its disk (e.g. c0t6d0) do:

#!/usr/bin/sh
for DISK in `ls dev/rdsk`
do
[ "${DISK}" != c0t6d0 ] && pvcreate -f /dev/rdsk/${DISK}
done

Regards!

...JRF...

[Ross Zubritski]

Just exclude your root disk from your config file.

Regards.

RZ

[Ross Zubritski]

Just a side note, pvcreate -f will not trash a disk with boot info on it. Confirmed with HP.

Regards,

RZ

[Chris Fadrowski]

[ "${DISK}" != c0t6d0 ] && pvcreate -f /dev/rdsk/${DISK}

not good at scripting but does this statement mean, "do NOT include disk c0t6d0" ???? Just need to verify.


All these disks will be on an EMC Sym with only one internal used for vg00.

[S.K. Chan]

Do a multiple loop .. for example say you want to pvcreate c[1-3]t[0-4]d[0-2] you can run ..
# for i in 1 2 3
> do
> for j in 0 1 2 3 4
> do
> for k in 0 1 2
> do
> pvcreate -f /dev/rdsk/c${i}t${j}d${k}
> done
> done
> done
Any devices not found in the range will just come back with any error "couldn;t open physical volume", no harm done.
Just any idea ..

[Ross Zubritski]

!= will exclude that string.

[James R. Ferguson]

Hi (again) Chris:

[ "${DISK}" != c0t6d0 ] && ppvcreate -f "/dev/rdsk/${DISK}"

...is shorthand for test the variable ${DISK} to be not equal c0t6d0. If that is true then execute the next statement, which in this case is 'pvcreate'.

See the man pages for 'test' for more information.

Regards!

...JRF...

[Chris Fadrowski]

thanks for all the great answers. I tested JRF's answer and it worked well.

I am trying to assign points but the ITRC isn't working real well for me today. I will keep trying the rest of the day to get the points out to you guys. thanks again.

[John Meissner]

inq -f_emc | grep ^/dev | awk '{print $1}' > emc.out
cat emc.out | awk '{print "pvcreate -f " $1}' > pvemc.sh
chmod +x pvemc.sh
./pvemc.sh

[John Meissner]

my prior post is assuming that you have "inq" (an EMC utility) installed.