iii ATTO Technology Inc. ATTO ExpressSAS Host & RAID Adapter Installation and Operation Manual
Appendix B Configuration and Management
Driver Configuration
Use the esxcfg-module command to query and
configure the ATTO adapter driver parameters. In the
examples that follow, <driver name> should be
replaced with the ATTO driver name.
To obtain a list of available driver parameters:
# esxcfg-module -i <driver name>
To list the driver parameters that have been set:
# esxcfg-module -g <driver name>
To set a driver parameter:
# esxcfg-module -s param=value <driver
name>
Configuration changes made with the esxcfg-module -
s command are persistent across system reboots.
However, the changes will not take affect until the
system is rebooted.
The following table lists the configurable parameters
along with a brief description.
PARAMETER DESCRIPTION
atto_log_mask Defines the log mask for sending ATTO driver
information to the system log. Default is 0 (none).
atto_max_sectors Maximum number of disk sectors in a single data
transfer. Default is 65535 (largest possible value).
can_queue Maximum number of commands per adapter
channel. Default is 128.
change_notification Enable notifying the OS of the arrival and
departure of target devices. Default is 1 (on).
cmd_per_lun Maximum number of commands per LUN. Default
is 16.
cmd_retry_count Maximum number of retries allowed for a
command. Default is 20.
event_log_mask A bit mask of events to report to the system log.
Default is 0x00000001 (crtitical events only).
heap_initial Initial heap size allocated for the dirver.
heap_max Maximum attainable heap size of the driver.
io_time_out Time (in seconds) before an I/O command is timed
out by the driver. Set to 0 for no timeout. Default is
30.
num_sas_addr Number of SAS addresses to assign to the
adapter's PHYs. Addresses are assigned
sequentially from the base address. Valid settings
are 1, 2, 4, 8. Default is 1.
num_sg_lists Number of SGL pages. Default is 256.
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