Make sure you have met the prerequisites ("Prerequisites for Managing the System") and have read the preliminary information ("Preliminary Information For Enabling and Disabling NVRAM").
Refer to "How to Stop a Disk (DiskSuite Tool)" to quiesce all I/O.
Be sure that no I/O is active on metadevices defined that exist on disks within a SPARCstorage Array. In particular, ensure that ownership of any diskset metadevices has been released since an implicit I/O stream exists while ownership of a diskset is maintained.
Click Disk View.
The Disk View window appears.
In the Disk View window, select a controller, tray, or individual disk or disks.
Choose Fast Write from the Object menu, then choose Enable.
A Fast Write dialog box appears, reminding you that all I/O to the object should be stopped. Click Continue.
A confirmation appears, indicating that fast write has been enabled. Click OK.
Refer to "How to Start a Disk (DiskSuite Tool)" to restart the disks.