User manual

FIBRE-to-SAS/SATA RAID SUBSYSTEM
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User Manual
NOTE: Use Cache Mirror option to achieve cache coherency when
operating dual controllers in Active:Active configurations.
6.1.2.4 Disk Caching
The system supports disk caching, which will improve performance once enabled.
Disk caching is enabled by default.
6.1.2.5 Disable Sync Cache Command
With Write Caching enabled for an array volume or standalone disk, the OS
provides for the 'synchronize cache' command when initiating shutdown, where the
cached data is written to the hard disk(s) before the computer shuts down.
Certain Host OS platforms require that the target array volume or standalone drive
does not support 'synchronize cache' commands.
The system provides an option where the 'synchronize cache' commands can be
enabled or disabled as required.
By default, the 'synchronize cache' command is enabled.
The 'synchronize cache' command can be enabled/disabled in the following way:
1) Using the Monitor command line
To disable the 'synchronize cache' command (scsi command 0x35 0x91) enter:
"set config scsi_control 0x40"
To enable the 'synchronize cache' command enter:
"set config scsi_control 0x0"