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Operating Systems AIX Uninstall native MPIO driver on AIX Post 302416032 by ronykris on Saturday 24th of April 2010 11:58:46 AM
Old 04-24-2010
Sure.

I work in a storage lab and have been doing some tests on the firmware running on the DS series of arrays with different operating systems and AIX happened to be one of them. I have to confirm a behavior as part of my use case and the test goes something like this -

Configure MPIO to manage the luns.
Verify the luns are presented appropriately on the paths coming from the array.
Take the failover driver out of service.
Perform a bus scan and verify that all the luns are presented on both the paths coming from the array.

I did not realize that MPIO was managing the internal SAS HDDs as well. I guess it is impossible to remove MPIO if it manages even one device.


Any thoughts on how this can be done?
 

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ql-dynamic-tgt-disc(8)					       System Administration					    ql-dynamic-tgt-disc(8)

NAME
ql-dynamic-tgt-lun-disc - Scans for newly added LUNs. SYNOPSIS
ql-dynamic-tgt-lun-disc [OPTIONS] DESCRIPTION
Dynamic TGT-LUN Discovery Utility This utility scans for newly added LUNs. After adding new LUNs, you do not need to unload, then load the QLogic FC driver or reboot the system To begin scanning the LUNs issue following command: # /usr/sbin/ql-dynamic-tgt-lun-disc -al, --allow-lip LIP is not issued by default, even if it is required for scanning new LUNs Setting this option, allows the utility to issue LIP. -cl, --current-luns Displays LUNS currently present -e, --extended-scan Use this option as "-e | --extended-scan". to rescan LUNs. This will identify any change in attributes of existing LUNs. This option can be used in combination of scan/refresh or max luns -h, --help, ? Prints this help message -i, --interactive Use this option to use the menu driven program -is, --iscsi Use this option to operate on ISCSI HBAs, this option can be used in combination of any other supported option. -m, --max-lun To set the maximum LUNs to be scanned -p, --proc Use PROC file system for LUN scanning -r, --refresh To refresh, that is remove LUNs that are lost use the options "-r|--refresh". This will remove the LUNs which no more exist. -s, --scan [ -r|--refresh ] The QLogic LUN scan utility re-scans all the devices connected to the QLogic HBA SEE ALSO
ql-lun-state-online(8), ql-hba-snapshot(8), ql-set-cmd-timeout(8) Matthias Schmitz <;matthias@sigxcpu.org> July 2009 ql-dynamic-tgt-disc(8)
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