scsimgr_eschgr.7 (2010 09)

scsimgr_eschgr(7) scsimgr_eschgr(7)

Timeout for modesense 0x1D com-

mand.

Default: 600

readaddr_secs RW uint32

Timeout for the exchange command.

Default: 600

exchange_secs RW uint32

I/O Load Balancing and Multi-Pathing Policies

The eschgr driver uses path_lockdown

method as load balancing policy and has minimal support for

multi-pathing.

When the device is ﬁrst opened after a system boot, a path is chosen and will remain ﬁxed. If the path

fails, the new path will be picked on next open only. But with the support of the

lpt_to_lockdown

attribute beginning in the HP-UX 11i v3 March 2009 Update, it lets users select a lunpath among avail-

able lunpaths to the device, which will be locked down and I/O’s will be issued on the newly selected lun-

path. Please refer to the scsimgr attribute table in scsimgr(1M) for more information on the

lpt_to_lockdown

attribute.

EXAMPLES

To display

scsimgr eschgr plug-in general help and supported commands:

scsimgr -h -d eschgr

To get eschgr driver global statistics:

scsimgr get_stat -d eschgr

To clear eschgr driver global statistics:

scsimgr clear_stat -d eschgr

To get eschgr driver global status information:

scsimgr get_info -d eschgr

To display information about eschgr driver global attributes:

scsimgr get_attr -d eschgr

AUTHOR

SCSI class driver eschgr plug-in for scsimgr was developed by HP.