Hitachi Compute Rack 210H, Руководство по биосу

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2-70 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.