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Full Discussion: Changing AIX LUN paths
Operating Systems AIX Changing AIX LUN paths Post 302994206 by agent.kgb on Monday 20th of March 2017 11:38:09 AM
Old 03-20-2017
Quote:
Originally Posted by bbbngowc
Hello,
I'm thinking this can be done in this order:
  1. unmount the filesystems
  2. varyoffvg vg
  3. make the changes on the storage system (EMC)
  4. cfgmgr
  5. varyonvg vg
  6. mount the filesystems
I don't know this side of EMC, but let's assume, that nothing will be changed on the underlying device during changing the connection type, then you need several additional steps:

-1. make backup
0. notice all PVIDs of all disks, you have
2.5. exportvg all volume groups, rmdev all the disks, you plan to change
4.5. make sure, that you see the same PVIDs on the new disks. If you don't - go back and doesn't try to do anything further.
5. importvg all the volume groups, you exported before.

It could be also good to notice VG major numbers. Sometimes they are useful.
 

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ISCSI.CONF(5)							File Formats Manual						     ISCSI.CONF(5)

NAME
iscsi.conf - iSCSI Target and LUN configuration SYNOPSIS
/etc/iscsi.conf DESCRIPTION
This manual page describes the format of the /etc/iscsi.conf file. This file is a simple text file that iscsid(8) uses to locate iSCSI tar- get devices and LUNs. Comments are marked by lines beginning with '#'. Available entries include: DiscoveryAddress=<address> IP address or hostname to use for target discovery. A TCP port number may be specified by appending a colon followed by the port number. This entry must start in the first column, and must not contain any whitespace. TargetIpAddr=<address> A synonym for DiscoveryAddress. Username=<user> Specify the authentication user. If this entry precedes all DiscoveryAddress entries, it serves as the default. If this entry is indented under a DiscoveryAddress entry, it specifies the user for all targets discovered at that IP address. Password=<pass> Specify the authentication password for the previously listed iSCSI If this entry precedes all DiscoveryAddress entries, it serves as the default. If this entry is indented under a DiscoveryAddress entry, it specifies the user for all targets discovered at that IP address. EXAMPLE
# set the default user and password Username=alice Password=nty57nbe # targets at this address will use the default Username and Password DiscoveryAddress=192.168.10.94 # targets at this address will use the Username and Password below DiscoveryAddress=192.168.10.95 Username=beatrice Password=93fdgc20 NOTES
The iSCSI initiator drivers, README files, and example configuration files are available on the Linux-iSCSI homepage at: http://linux-iscsi.sourceforge.com <http://linux-iscsi.sourceforge.com> FILES
/etc/iscsi.conf iSCSI Target and LUN configuration SEE ALSO
iscsid(8) $Revision: 1.9 $ $Date: 2002/09/19 20:00:32 $ ISCSI.CONF(5)
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