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MegaRAID
WebBIOS
Hitachi Compute Rack 210H/220H BIOS Guide
Changing the write policy
This section describes a procedure of changing the write policy of a virtual drive.
You can expect better write performance if you enable the write cache of the
virtual drive.
NOTICE
You need connect the AC cables of the system unit to a UPS, when you
use the RAID controller without cache backup module and set
Write
Policy
to
Always Write Back
. Otherwise, the data corruption may
result when blackout or momentary loss of power occurs.
If you use the RAID controller without cache backup module, use
Write Through
setting when installing an OS. Even if the system
unit is connected to a UPS, the install may not finish normally.
If you use the RAID controller with cache backup module, use only
Write Back With BBU
setting. Otherwise, write performance may
be compromised.
If multiple virtual drives reside on the same Drive Group, keep the
same setting for all the virtual drives.
1.
Click
Virtual Drives
in the main menu.
