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Operating Systems Linux Red Hat How to Find what HBA is configured on Linux? Post 302505942 by titanic4u on Friday 18th of March 2011 04:36:35 AM
Old 03-18-2011
Here is little info, hope it helps:
(1) how do I know what is the LUN ID.
-> Depands on the driver which you are using.
for example: if using linux native multipathing then "multipath -ll" will show you the Lun & their details.
If using, third party drivers related to SAN:
for example - Rdac/mpp from IBM then u can use mppUtil -a <storage name>, will show u all the details of Luns...

(3) how do I scan for new LUNs.
again if using linux native multipath then run "rescan-scsi-bus.sh" avaialbe from sg3_utils rpm.
If using third party, for example Rdac of IBM: run "mppBusScan" and it will detect the new LUNs.

Hope it helps....

~Titans~
This User Gave Thanks to titanic4u For This Post:
 

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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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