Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

Table 16-2
DMP parameters that are tunable (continued)
DescriptionParameter
The DMP restore policy, which can be set to one of the
following values:
■ check_all
■ check_alternate
■ check_disabled
■ check_periodic
The default value is check_disabled
The value of this tunable can also be set using the vxdmpadm
start restore command.
See “Configuring DMP path restoration policies” on page 189.
dmp_restore_policy
If an inquiry succeeds on a path, but there is an I/O error,
the number of retries to attempt on the path.
The default value is 30.
A value can also be set for paths to individual arrays by
using the vxdmpadm command.
See “Configuring the response to I/O failures” on page 185.
dmp_retry_count
Determines the timeout value to be set for any SCSI
command that is sent via DMP. If the HBA does not receive
a response for a SCSI command that it has sent to the device
within the timeout period, the SCSI command is returned
with a failure error code.
The default value is 60 seconds.
dmp_scsi_timeout
The time interval between gathering DMP statistics.
The default and minimum value are 1 second.
dmp_stat_interval
545Performance monitoring and tuning
Tuning VxVM