The queue depth for the storage system devices (max_throttle, max_pending for Solaris ZFS) must be set as specified. You can adjust the queue depth for the devices later as needed to optimize the I/O performance. For details about queue depth, see Host queue depth.
The required I/O time-out value (TOV) for storage system devices is 60 seconds (default TOV=60). If the I/O TOV has been changed from the default, change it back to 60 seconds by editing the sd_io_time or ssd_io_time parameter in the /etc/system file.
Several other parameters (for example, FC fibre support) may also need to be set. See the user documentation for the HBA to determine whether other options are required to meet your operational requirements.
Use the same settings and device parameters for all storage system devices. For Fibre Channel, the settings in the system file apply to the entire system, not to just the HBAs.