12-12-2009
HACMP 5.4 / 5.5 does have bugs
Yes, IBM POWER HA or HACMP 5.4 / 5.5 does have bugs regarding increasing filesystems. see here
IBM IY90392: CHANGING FILESYSTEM THROUGH CSPOC FAILS AND RESULTS IN RG_MOVE - United States
APAR status
Error description
- The customer changed a filesystem size through CSPOC and
that failed, but it also resulted in moving the resource
group to the other node.
Local fix
Problem summary
- ****************************************************************
* USERS AFFECTED:
* Users of HACMP for AIX R540 performing C-SPOC operations with
* the cluster.es.cspoc.cmds and cluster.es.cspoc.rte filesets
* below the level of 5.4.0.2.
****************************************************************
* PROBLEM DESCRIPTION:
* C-SPOC operations on shared volume groups can result in the
* volume group becoming inaccessible.
****************************************************************
* RECOMMENDATION:
* Install APAR IY90392.
****************************************************************
Problem conclusion
- Correct code added in 551404 to update timestamp to do so
without setting or leaving a reserve on the volume group
Temporary fix
*********
* HIPER *
*********
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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)