Acer Altos T350 F2 Faq page 47

Altos T350 F2 FAQ (Frequently Asked Questions)
21. When Altos T350 F2 is installed with Windows Small Business Server 2011 (SBS 2011), the
settings of disk write cache or RAID volume write-back cache is always disabled. Though
I can temporarily enable it, it would be disabled again after reboot.
There is no such issue if Altos T350 F2 is installed with Windows Server 2008 R2.
ANSWER: This is the normal behavior of Windows Small Business Server 2011. The same behavior
will also be applied on Windows Server 2008 R2 if the system is acted as active directory
domain controller.
One role of Windows Small Business Server 2011 is active directory domain controller. The
domain controller stores active directory information in the database that is resided in
system partition. Active directory information is critical and important for a domain
environment.
To prevent data loss or corruption of active directory information, Windows Small Business
Server 2011 will automatically disable disk write cache and RAID volume write-back cache.
More information can found at:
http://technet.microsoft.com/en-us/library/dd941847(WS.10).aspx
http://support.microsoft.com/kb/888794/en
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