Chapter 7. Configuring Your Controller
118 3ware Serial ATA RAID Controller User Guide
When Yes, the unit write cache and the disk drive write cache will be
disabled if the unit degrades. This setting has no effect on non-redundant
arrays. Write cache will be automatically re-enabled when the unit returns
to normal.
When
No, the unit and disk drive write cache will remain enabled (if it is
enabled), in the event that the unit degrades.
This policy can only be set in 3BM and CLI.
•
Staggered method. Indicates whether the type of staggered spin-up is
ATA-6 or SATA OOB (Out Of Band). By default, when Staggered Spin-
up is enabled, the ATA-6 scheme is used. If your drives support the SATA
OOB method, select that method in 3BM. There is no electronic method
for the controller to know if a drive supports this method, so it must be set
manually. For staggering to work properly, the drives must support the
selected method. This policy can only be set and only shows in 3BM.
Some additional policies can be set at the unit level. For more information,
see Chapter 8, “Configuring Units.”
Viewing Controller Policies
You can view the current state of controller policies in 3DM, in the Other
Controller Settings
section at the bottom of the Controller Settings Page, as
shown in Figure 49. However, only the Auto-Rebuild, Auto-Carving, and
Carve Size policies can be changed on this page. The other policies can be
changed in 3BM or through the CLI. For a summary of the initial default
settings, see Table 5, “Initial Default Settings for Policies,” on page 17.
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