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WriteIoAggregateMinSize

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The WriteIoAggregateMinSize 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.

Note   These settings only apply to Windows 8.

Values

WriteIoAggregateMaxSize is an integer value, in bytes.

The default value is 1048576 (1 GB) for an eMMC OS volumes, otherwise, the default value is 0.

Valid Configuration Passes

offlineServicing

specialize

auditSystem

oobeSystem

Parent Hierarchy

microsoft-windows-securestartup-filterdriver- | WriteIoAggregateMinSize

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="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <BytesDecryptedInDiskRequestOverhead>524288</BytesDecryptedInDiskRequestOverhead>
  <InPlaceCrypto>0</InPlaceCrypto>
  <MaxCryptoRequestsPerIo>5</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>

microsoft-windows-securestartup-filterdriver-