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Submitted by:
lvo |
coolcommand
dlmpr - utility for clearing Hitachi SAN HDLM persistent reservation |
Description
The persistent reservation of a logical unit (LU) may not be canceled due to some reason when multiple hosts share a volume group rather than making up a cluster configuration using HACMP. In this case, this utility clears the Reservation Key to cancel the persistent reservation.
# /usr/DynamicLinkManager/bin/dlmpr {{-k | -c} [hdiskn] | -h}
where:
-k: specify this parameter to display the Reservation Key. The utility displays an asterisk (*) for a Reservation Key of another host. If the Reservation Key is not set, [0x0000000000000000] is displayed.
-Regist Key: the registered Keys are displayed.
-Key Count: the number of registered Keys is displayed.
-c: specify this parameter to clear the Reservation Key.
hdiskn: specify the physical volume (hdiskn) for which you want to display the Reservation Key. You can specify more than one volume. Note: If you do not specify this parameter, the utility displays the Reservation Keys for all the physical volumes.
-a: when multiple physical volumes (hdiskn) are specified, even if an error occurs during processing, the processing continues for all physical volumes.
-h: displays the format of the utility for clearing HDLM persistent reservation.
Note: [0x????????????????] appears for Reservation Key if the destination storage subsystem does not support the persistent reservation or if a hardware error occurs.
Example to execute the dlmpr utility to display the Reservation Keys for hdisk1, hdisk2, hdisk3, hdisk4, hdisk5, and hdisk6:
# /usr/DynamicLinkManager/bin/dlmpr -k hdisk1 hdisk2 hdisk3 hdisk4 hdisk5 hdisk6
self Reservation Key : [0xaaaaaaaaaaaaaaaa]
hdisk1 Reservation Key : [0xaaaaaaaaaaaaaaaa]
Regist Key : [0xaaaaaaaaaaaaaaaa], Key Count : 1
hdisk2 Reservation Key : [0xbbbbbbbbbbbbbbbb]*
Regist Key : [0xaaaaaaaaaaaaaaaa], Key Count : 2
Regist Key : [0xbbbbbbbbbbbbbbbb], Key Count : 2
hdisk3 Reservation Key : [0xbbbbbbbbbbbbbbbb]*
Regist Key : [0xbbbbbbbbbbbbbbbb], Key Count : 4
hdisk4 Reservation Key : [0xaaaaaaaaaaaaaaaa]
Regist Key : [0xaaaaaaaaaaaaaaaa], Key Count : 4
hdisk5 Reservation Key : [0x0000000000000000]
hdisk6 Reservation Key : [0x0000000000000000]
Regist Key : [0xaaaaaaaaaaaaaaaa], Key Count : 1
Regist Key : [0xbbbbbbbbbbbbbbbb], Key Count : 1
Example to execute the dlmpr utility to clear the Reservation Keys for other hosts (marked by an asterisk (*)):
# /usr/DynamicLinkManager/bin/dlmpr -c hdisk2 hdisk3 |
Example
dlmpr -k hdisk1; dlmpr -c hdisk2 |
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Sunday May 27, 2012
