ModifiedWriteMaximum
Applies To: Windows 8, Windows Server 2012
Important
This setting has been deprecated in Windows® 8.1. The information about this deprecated setting is provided for reference only.
The ModifiedWriteMaximum setting works with other settings in the Microsoft-Windows-SecureStartup-FilterDriver component to optimize BitLocker settings for PCs with hardware architectures such as System on a Chip (SoC). Do not use these settings for standard 32-bit or 64-bit hardware architectures.
These settings are intended for OEM manufacturing only. For specific guidance on using these settings, contact Microsoft.
Values
ModifiedWriteMaximum is an integer value, in MB.
The default value is 4 (4 MB).
Valid Configuration Passes
offlineServicing
specialize
auditSystem
oobeSystem
Parent Hierarchy
Microsoft-Windows-SecureStartup-FilterDriver | ModifiedWriteMaximum
Applies To
For a list of the Windows editions and architectures that this component supports, see Microsoft-Windows-SecureStartup-FilterDriver.
XML Example
The following example specifies recommended values for Bitlocker optimizations on an x86 System on a Chip.
<component name="Microsoft-Windows-SecureStartup-FilterDriver" processorArchitecture="x86" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="https://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<BytesDecryptedInDiskRequestOverhead>262144</BytesDecryptedInDiskRequestOverhead>
<InPlaceCrypto>0</InPlaceCrypto>
<MaxCryptoRequestsPerIo>4</MaxCryptoRequestsPerIo>
<MaxDecryptRequests>0</MaxDecryptRequests>
<MaxEncryptRequests>2</MaxEncryptRequests>
<ModifiedWriteMaximum>4</ModifiedWriteMaximum>
<ReadDoubleBuffering>0</ReadDoubleBuffering>
<SlicedEncryptionInPlace>1</SlicedEncryptionInPlace>
<SlicedEncryptionMinSize>524288</SlicedEncryptionMinSize>
<SlicedEncryptionRequestsMax>1</SlicedEncryptionRequestsMax>
<WriteIoAggregateMaxSize>1048576</WriteIoAggregateMaxSize>
<WriteIoAggregateMinSize>1048576</WriteIoAggregateMinSize>
<WriteSubrequestLength>524288</WriteSubrequestLength>
</component>