Managing SAN Devices and Multipathing in Oracle^® Solaris 11.3

Tuning Disk Target Driver Properties

This appendix explains how to tune the Oracle Solaris disk target driver (sd or ssd driver) properties in the .conf file by using the sd-config-list or ssd-config-list global property.

The appendix describes the following formats for tuning disk target driver properties:

• Name:Value Pair Format to Tune Disk Drivers

• Bit-Masking Format to Tune Disk Drivers

Tunable Parameters for Disk Drivers

The tunable parameters to tune a disk driver uses the following prefix categories:

• BCD – Binary-Coded-Decimal as shown in Figure 3, Table 3, Supported Tunables and Their Flag Values on Different Platforms

• delay – Delay time in issuing a retry

• timeout – Maximum time allowed by a process

• reset – Reset control

• retries – Number of retries before failure

• throttle – Activity control

The following tunable names and their data types are supported by Oracle Solaris 10 and Oracle Solaris 11:

cache-nonvolatile

BOOLEAN

controller-type

UINT32

delay-busy

UINT32

disksort

BOOLEAN

emulation-rmw

UINT32

physical-block-size

UINT32

reset-lun

BOOLEAN

retries-busy

UINT32

retries-timeout

UINT32

retries-notready

UINT32

retries-reset

UINT32

rmw-type

UINT32

timeout-releasereservation

UINT32

throttle-max

UINT32

throttle-min

UINT32

The tunable parameters that are supported only in Oracle Solaris 11 are all BOOLEAN data types. The parameters are:

• cdb-suppress-dpofua

• mmc-gesn-polling

• power-condition