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Operating Systems
Linux
Red Hat
FC Luns rescan issue
Post 302951087 by sumit6in on Sunday 2nd of August 2015 12:57:33 AM
08-02-2015
Hi Scrutinizer & Peasant,
@ Scrutinizer - as per storage team lun masking and zoning is correct as per them.
@Peasant- Yes it might be the case that disk might be present to server with same wwid as used earlier for any other server.
yes i have diff the output for both multipath -ll, in one rac disk are showing in multipath and not in another.
and Guys thanks for your suggestions but it seems we have downtime now with no other options , we might reboot the server for this issue.
i'm not sure its a bug or what.
will guys posted u on this if issue has been resolved after reboot or not..
thanks all for your support.
@ Scrutinizer - as per storage team lun masking and zoning is correct as per them.
@Peasant- Yes it might be the case that disk might be present to server with same wwid as used earlier for any other server.
yes i have diff the output for both multipath -ll, in one rac disk are showing in multipath and not in another.
and Guys thanks for your suggestions but it seems we have downtime now with no other options , we might reboot the server for this issue.
i'm not sure its a bug or what.
will guys posted u on this if issue has been resolved after reboot or not..
thanks all for your support.
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LEARN ABOUT CENTOS
rescan-scsi-bus.sh
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)