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Operating Systems Linux Red Hat How to Find what HBA is configured on Linux? Post 302503663 by Tirmazi on Friday 11th of March 2011 09:08:17 AM
Old 03-11-2011
How to Find what HBA is configured on Linux?

Hi

I am working in an environment where there are many redhat physical and virtual machines, mostly Redhat 4. These servers have LUNs attached. The external storage can be EMC, NetApp or Par3.
My question is that when Storage Administrator informs that a new LUN has been presented to a particular Redhat Linux server
(1) how do I know what is the LUN ID.
(2) how do I know what kind of HBA is attached to my server.
(3) how do I scan for new LUNs.

Please guide me I have searching over the net for a while, lastly is there a guide/doc on this, the storage guide from Redhat are not in to much detail.

Thanks and regards
 

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RESCAN-SCSI-BUS.SH(1)						   User Commands					     RESCAN-SCSI-BUS.SH(1)

NAME
rescan-scsi-bus.sh - script for adding and removing SCSI devices without rebooting SYNOPSIS
rescan-scsi-bus.sh [options] [host [host ...]] OPTIONS
-a, --alltargets scan all targets, not just currently existing [default: disabled] -d enable debug [default: 0] -l activates scanning for LUNs 0--7 [default: 0] -L NUM activates scanning for LUNs 0--NUM [default: 0] -w, --wide scan for target device IDs 0--15 [default: 0--7] -c enables scanning of channels 0 1 [default: 0 / all detected ones] -r, --remove enables removing of devices [default: disabled] -f, --flush flush failed multipath devices [default: disabled] -i, --issue-lip issue a FibreChannel LIP reset [default: disabled] -u, --update look for existing disks that have been remapped -s, --resize look for resized disks and reload associated multipath devices, if applicable --forcerescan rescan existing devices --forceremove remove and readd every device (DANGEROUS) --nooptscan don't stop looking for LUNs is 0 is not found --color use coloured prefixes OLD/NEW/DEL --hosts=LIST scan only host(s) in LIST --channels=LIST scan only channel(s) in LIST --ids=LIST scan only target ID(s) in LIST --luns=LIST scan only lun(s) in LIST --sync, --nosync issue a sync / no sync [default: sync if remove] --attachpq3 tell kernel to attach sg to LUN 0 that reports PQ=3 --reportlun2 tell kernel to try REPORT_LUN even on SCSI2 devices --largelun tell kernel to support LUNs > 7 even on SCSI2 devs --sparselun tell kernel to support sparse LUN numbering Host numbers may thus be specified either directly on cmd line (deprecated) or or with the --hosts=LIST parameter (recommended). LIST: A[-B][,C[-D]]... is a comma separated list of single values and ranges (No spaces allowed.) SEE ALSO
rescan-scsi-bus.sh Homepage: http://www.garloff.de/kurt/linux/#rescan-scsi sg3_utils Homepage: http://sg.danny.cz/sg rescan-scsi-bus.sh 1.57 leden 2014 RESCAN-SCSI-BUS.SH(1)
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