Hitachi Dynamic Link Manager Software Users Guide for Linux

Note
• Before executing the dlmpr utility, make sure that the LU for which
persistent reservation will be cleared is not being accessed.
If you perform the following operation while both of the following
conditions exist, an error occurs when reservation-key is read, and
0x???????????????? is displayed.
Conditions
- Multiple paths are configured to the HDLM device.
- A persistent reservation has been set by the cluster software.
Operation
1. Clear persistent reservation, specifying the SCSI device.
2. Execute the dlmpr utility with the -k parameter specified to display
the PersistentReserve information for a SCSI device associated with a
different path.
If the above display error occurs, re-execute the dlmpr utility with the -k
parameter specified.
dlmsetopt Utility for Setting HDLM Driver Options
This utility changes the settings for the HDLM filter driver. Restart the host
machine to apply the changed settings. Note that you do not need to restart
the host machine every time you execute the dlmsetopt utility. If you
execute the dlmsetopt utility more than once, restart the host after you have
finished specifying all settings. Restarting the host enables all the changed
settings.
Format
/opt/DynamicLinkManager/bin/dlmsetopt {-r retrycount | -inqt
InquiryTimeout | -inqr InquiryRetry | -prsup ReserveStatus| -h}
Parameters
-r
Specify the number of retries when memory is allocated in the filter
driver. This memory is allocated for processing I/O requests from users. If
memory allocation fails, the system retries at intervals of 0.05 seconds. If
retrying for a long time results in I/O not being executed, set an
appropriate retry count. If that retry count is exceeded and memory
allocation fails, the KAPL05708-E message is output to syslog and to the
HDLM manager log file.
retrycount
Specify a numeric value from -1 to 2,147,483,646.
-1 : The system retries until memory is allocated. This is the initial
value of the system.
0 : The system does not retry.
Utility Reference
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Hitachi Dynamic Link Manager (for Linux®) User Guide