Move a LUN from one server to the other Post: 303013122

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Operating Systems Linux Red Hat Move a LUN from one server to the other Post 303013122 by bakunin on Thursday 15th of February 2018 09:58:31 AM

02-15-2018

Registered User

Quote:

Originally Posted by fretagi

I can see the new LUN when running fdisk:

Code:

fdisk -l | egrep '^Disk' | egrep -v 'dm-' | grep -v identifier
Disk /dev/sda doesn't contain a valid partition table
Disk /dev/cciss/c0d0: 450.0 GB, 450064605184 bytes
Disk /dev/sda: 32.2 GB, 32212254720 bytes

so I think the new LUN is /dev/sda

I don't think this is the same LUN because otherwise you would see the filesystems/partitions/whatever on it. Notice that LUNs have an identifier (the so-called "WWN" and you can identify it by this. Use your HBAs driver software to find out the WWNs of your attached disks.

Notice also that there is the "zoning" which has to be correct: basically zoning is somewhat analogous to firewall rules: each partner (the LUN, the HBA, the fabrics port) has an identifying WWPN (World Wide Port Number) and you create a rule that says WWPN A (your adapter) is allowed to connect to WWPN B (the LUN) and vice versa. If the LUN was part of a different system before you perhaps need to change this rule to make it visible to the new system (or, more precisely, to its FC adapter). Your storage administrator should be able to explain the intrinsics to you in more detail.

I hope this helps.

bakunin

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LEARN ABOUT REDHAT

rhn_check

RHN_CHECK(8)							  Red Hat Network						      RHN_CHECK(8)

NAME

       rhn_check - check for queued actions on RHN and execute them

SYNOPSIS

       /usr/sbin/rhn_check [-v] [--verbose]

DESCRIPTION

       rhn_check  is  a  client  program that connects to the Red Hat Network backend servers and retrieves information associated with the queued
       actions for this particular system. This script reads the digital server ID from /etc/sysconfig/rhn/systemid and uses that to identify  the
       machine to the Red Hat Network. Upon successfull authentication, rhn_check will start processing the queued actions sequentially.

ACTION TYPES

       The following types of actions are currently processed by rhn_check:

       action type	 description

       ()																	       ()

       refresh		 This action will refresh the hardware or software profiles of this
			 machine with Red Hat Network. This fucntion is called as
			 refresh(hardware) or refresh(rpmlist)
       new_systemid	 This action is used by the RHn Backend to update the Digital
			 system ID of this machine with a new one.
       update_packages	 This action will trigger rhn_check into running a package
			 update for a list of packages queued from the Red Hat Network.
			 rhn_check will use modules from the up2date client to download
			 the packages, solve dependencies and install the on the system.

FILES

       /etc/sysconfig/rhn/systemid  The digital server ID for this machine if the system has been registered onto Red Hat Network.  This file does
       not exist otherwise.

       /var/spool/up2date This directory is used by up2date to store package headers and RPM packages downloaded from Red Hat Network

SEE ALSO

       man pages for up2date(8) and rhnsd(8).

AUTHORS

	      Cristian Gafton <gafton@redhat.com>
	      Preston Brown <pbrown@redhat.com>

																		()