Igroups

What are igroups?

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--> contains initiators that can access your storage

--> tables of WWPNs (for FCP) or iqn host node names (for iSCSI) that are

    allowed to access a LUN

--> igroups can have multiple initiators

--> multiple igroups can have same initiator

--> a LUN cannot be mapped to multiple igroups having same initiator

--> an initiator can be a member of igroups of different ostypes

Commands

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Displaying

# prints igroups igroup show igroup show -v

Creating

# creates an ISCSI igroup igroup create -i -t igroup create -i -t windows_2008 win_host5_group2 iqn.1991-05.com.microsoft:host5.domain.com ** os types: solaris, Solaris_efi, windows, windows_gpt,              windows_2008, hpux, aix, linux, netware, vmware, xen, hyper_v # creates an FCP igroup igroup create -f -t … igroup create -f -t aix aix-igroup3 10:00:00:00:0c:2b:cc:92 ** NOTE: you must use WWPN (portname) and not WWN

Managing

# adding an initiator igroup add igroup add INTDB01 10:00:00:00:c9:5e:ca:5e # removing an initiator iggroup remove igroup remove INTDB01 10:00:00:00:c9:5e:ca:5e

Deleting

# LUNS must be unmapped first igroup destroy # this will remove all LUN maps and destroy the igroup igroup destroy -f

Modifying

# renaming igroup rename z ** this will not impact access to LUNS that are inside the igroup

changing the WWNN (World Wide Node Name) of a system

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- both HA pairs must have same WWNN

- in order to change WWN, use this command: fcp nodename 50:0a:09:80:82:02:8d:ff

- for that to take effect, both HA pairs must be rebooted

Troubleshooting

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different WWNN on HA pairs

message: from autosupport: HA Group Notification from filer01 (FILER SCSI TARGET MISCONFIGURED) ERROR from /etc/messages: Tue Feb 17 17:12:39 EST [filer01:scsitarget.cluster.misconfigured:notice]: Filer SCSI Target Misconfigured. Run 'lun config_check'. resolution / fix: 1. match WWNs of both nodes (they must be the same) 2. reboot both nodes