scsimgr.1m (2010 09)

s
scsimgr(1M) scsimgr(1M)
implies that by default ALUA
functionality will be handled for
the devices supporting it.
Indicates whether support of
retry delay timer codes returned
by devices complying with SAM-4
(SCSI Architecture Model 4) in
case of congestion, is enabled or
disabled. A value of false (0)
implies that support of delay
timer codes is disabled by default.
A value of true (1), implies that
support of retry delay timer code
is enabled by default.
retry_delay_enabled RO boolean
To enable/disable auto scan of
devices at the system wide scope.
Values: false (0) or true (1).
auto_scan_enable RW boolean
SCSI stack generates high prior-
ity I/Os for scanning devices as
well as for opening luns. On a
system with large lun
configuration, running ioscan
can result in too many of these
high priority I/Os. This causes
degradation in the performance of
regular I/Os. Using this attri-
bute, the maximum number of
high priority I/Os that can be gen-
erated per controller can be res-
tricted. By default, this attribute
is turned off by setting it to
0xFFFFFFFF. Typical values of
this attribute range from 128 to
2048. Choosing lower values will
result in slower ioscan but
better regular I/O performance.
Higher values yield faster ios-
can but degraded regular I/O per-
formance.
max_internal_hipri RW uint32
SCSI stack scans all the lunpaths
of a target simultaneously. This
leads to too-many high priority
I/Os to be processed by HBA.
Using this attribute, the number
of lunpaths to be scanned simul-
taneously per target can be res-
tricted. By default, this attribute
is turned off by setting it to
0xFFFFFFFF. Typical values of
this attribute range from 32 to
2048. Choosing lower values will
result in slower ioscan but better
regular I/O performance. Higher
values yield faster ioscan but
degraded regular I/O perfor-
mance.
max_lpt_scan RW uint32
HP-UX 11i Version 3: September 2010 − 15 − Hewlett-Packard Company 15