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In order to completly remove a LUN , first offline all paths, the run the following command

Same instruction is used to remove all offlined path to a LUN and update LUNs with paths pointing to no device " - "

grep for lines containing numbers , with the exception of those who have a slash

egrep [0123456789] month | grep -v "/" | grep -v A | tr -d .

To check LUN status on a linux with RDAC multipath instaled

do:

mppUtil -S

and check

/proc/mpp

directory structure

I tried to upgrade from the 5.4 DVD, however it didn't gave me the "upgrade option"

googled for a while and found the following "secret word" that enabled the upgrade option.

I used the following parameter during the boot.

linux upgradeany


How to enable access to a /dev/drdb0

Assuming that your cluster is already configured

you can use the following commands to check the status

#service drbd status

#drbdadm state r0 ( being r0 the name of the disk resource )

and to make current node Primary for a given disk (r0)

#drbdadm primary r0

After this you gain access to the /dev/drbd0 access.