11.7.1 Enabling and Disabling NVRAM

Fast writes can be configured:

• At the controller level, affecting all drives in the SPARCstorage Array

• At the drive level, setting fast write for an individual drive

• At the tray level, through the Solstice DiskSuite GUI

When fast write is enabled, it can be saved--across power cycles--as part of the SPARCstorage Array's configuration.

If the NVRAM battery is low, missing, or has failed, then fast write is disabled on the controller.

Before enabling fast write, you must stop all I/O to the controller or disk. In particular, ensure that diskset ownership has been released because an implicit I/O stream exists while ownership of a diskset is maintained. The following procedure explains how to stop all I/O.

Use the luxadm(1M) command to enable and disable NVRAM. Refer to the luxadm(1M) man page for complete information on this command.

For CVM, NVRAM should be disabled.