IBM System storage DS6000 Series, Attachment Manual, Page: 207 / 298

Setting the Sun host system parameters
The following sections contain the procedures to set the Sun host system
parameters for optimum performance on the storage unit with the following
adapters:
v AMCC
v
Emulex
v QLogic
Setting parameters for AMCC adapters
This section provides instructions for setting parameters for AMCC adapters.
1. Type cd/etc to change to the /etc subdirectory.
2. Backup the system file in the subdirectory.
3. Edit the system file and set the following parameters for servers with
configurations that use AMCC adapters:
sd_max_throttle
This sd_max_throttle parameter specifies the maximum number of
commands that the sd driver can queue to the host adapter driver. The
default value is 256, but you must set the parameter to a value less
than or equal to a maximum queue depth for each LUN connected.
Determine the value by using the following formula: 256 ÷ (LUNs per
adapter) where LUNs per adapter is the largest number of LUNs
assigned to a single adapter.
To set the sd_max_throttle parameter for the storage unit LUNs in this
example, you would add the following line to the /etc/system file:
set
sd:sd_max_throttle=5
sd_io_time
This parameter specifies the time-out value for disk operations. Add the
hba3-SCSI-target-id-0-fibre-channel-node-name="5005076300c0863a";
hba3-SCSI-target-id-0-fibre-channel-port-name="5005076300cf863a";
hba3-SCSI-target-id-1-fibre-channel-node-name="5005076300c0863a";
hba3-SCSI-target-id-1-fibre-channel-port-name="5005076300cb863a";
hba2-SCSI-target-id-0-fibre-channel-node-name="5005076300c0863a";
hba2-SCSI-target-id-0-fibre-channel-port-name="5005076300cf863a";
hba2-SCSI-target-id-1-fibre-channel-node-name="5005076300c0863a";
hba2-SCSI-target-id-1-fibre-channel-port-name="5005076300cb863a";
hba1-SCSI-target-id-0-fibre-channel-node-name="5005076300c0863a";
hba1-SCSI-target-id-0-fibre-channel-port-name="5005076300c1863a";
hba1-SCSI-target-id-1-fibre-channel-node-name="5005076300c0863a";
hba1-SCSI-target-id-1-fibre-channel-port-name="5005076300c5863a";
hba0-SCSI-target-id-0-fibre-channel-node-name="5005076300c0863a";
hba0-SCSI-target-id-0-fibre-channel-port-name="5005076300c5863a";
hba0-SCSI-target-id-1-fibre-channel-node-name="5005076300c0863a";
hba0-SCSI-target-id-1-fibre-channel-port-name="5005076300c1863a";
Figure 82. Example binding inserts for qlaxxxx.conf
Chapter 18. Attaching to a Sun host
177