---
title: GetDataBuffer
framework: kernel
role: pseudoSymbol
path: kernel/ioscsiprotocolservices/1809915-getdatabuffer
---

# GetDataBuffer

Accessor method to retrieve the data buffer associated with the specified request.

## Declaration

```occ
IOMemoryDescriptor * GetDataBuffer (
 SCSITaskIdentifierrequest ); 
```

## Parameters

- `request`: A valid SCSITaskIdentifier.

## Return Value

Return Value An IOMemoryDescriptor associated with the request. May be NULL if data transfer direction is kSCSIDataTransfer_NoDataTransfer.

## Overview

Overview Accessor method to retrieve the data buffer associated with the specified request.

## See Also

### Miscellaneous

- [AbortCommand](kernel/ioscsiprotocolservices/1809724-abortcommand.md)
- [AbortSCSICommand](kernel/ioscsiprotocolservices/1809736-abortscsicommand.md)
- [AbortSCSITaskFromQueue](kernel/ioscsiprotocolservices/1809747-abortscsitaskfromqueue.md)
- [AbortTask](kernel/ioscsiprotocolservices/1809759-aborttask.md)
- [AbortTaskSet](kernel/ioscsiprotocolservices/1809765-aborttaskset.md)
- [AddSCSITaskToHeadOfQueue](kernel/ioscsiprotocolservices/1809777-addscsitasktoheadofqueue.md)
- [AddSCSITaskToQueue](kernel/ioscsiprotocolservices/1809791-addscsitasktoqueue.md)
- [ClearACA](kernel/ioscsiprotocolservices/1809805-clearaca.md)
- [ClearTaskSet](kernel/ioscsiprotocolservices/1809813-cleartaskset.md)
- [CommandCompleted](kernel/ioscsiprotocolservices/1809823-commandcompleted.md)
- [CreateSCSITargetDevice](kernel/ioscsiprotocolservices/1809830-createscsitargetdevice.md)
- [EnsureAutosenseDescriptorExists](kernel/ioscsiprotocolservices/1809843-ensureautosensedescriptorexists.md)
- [ExecuteCommand](kernel/ioscsiprotocolservices/1809854-executecommand.md)
- [free](kernel/ioscsiprotocolservices/1809869-free.md)
- [GetAutosenseRequestedDataTransferCount](kernel/ioscsiprotocolservices/1809881-getautosenserequesteddatatransfe.md)
- [GetCommandDescriptorBlock](kernel/ioscsiprotocolservices/1809892-getcommanddescriptorblock.md)
- [GetCommandDescriptorBlockSize](kernel/ioscsiprotocolservices/1809902-getcommanddescriptorblocksize.md)
- [GetDataBufferOffset](kernel/ioscsiprotocolservices/1809935-getdatabufferoffset.md)
- [GetDataTransferDirection](kernel/ioscsiprotocolservices/1809946-getdatatransferdirection.md)
- [GetInitialPowerState](kernel/ioscsiprotocolservices/1809959-getinitialpowerstate.md)
- [GetLogicalUnitBytes](kernel/ioscsiprotocolservices/1809964-getlogicalunitbytes.md)
- [GetLogicalUnitNumber](kernel/ioscsiprotocolservices/1809972-getlogicalunitnumber.md)
- [GetProtocolLayerReference](kernel/ioscsiprotocolservices/1809980-getprotocollayerreference.md)
- [GetRealizedDataTransferCount](kernel/ioscsiprotocolservices/1809989-getrealizeddatatransfercount.md)
- [GetRequestedDataTransferCount](kernel/ioscsiprotocolservices/1809996-getrequesteddatatransfercount.md)
- [GetTaskAttribute](kernel/ioscsiprotocolservices/1810005-gettaskattribute.md)
- [GetTaskExecutionMode](kernel/ioscsiprotocolservices/1810017-gettaskexecutionmode.md)
- [GetTaskState](kernel/ioscsiprotocolservices/1810028-gettaskstate.md)
- [GetTimeoutDuration](kernel/ioscsiprotocolservices/1810038-gettimeoutduration.md)
- [HandleAbortTask](kernel/ioscsiprotocolservices/1810051-handleaborttask.md)
- [HandleAbortTaskSet](kernel/ioscsiprotocolservices/1810062-handleaborttaskset.md)
- [HandleCheckPowerState](kernel/ioscsiprotocolservices/1810080-handlecheckpowerstate.md)
- [HandleClearACA](kernel/ioscsiprotocolservices/1810093-handleclearaca.md)
- [HandleClearTaskSet](kernel/ioscsiprotocolservices/1810105-handlecleartaskset.md)
- [HandleLogicalUnitReset](kernel/ioscsiprotocolservices/1810119-handlelogicalunitreset.md)
- [HandlePowerChange](kernel/ioscsiprotocolservices/1810127-handlepowerchange.md)
- [HandlePowerOff](kernel/ioscsiprotocolservices/1810144-handlepoweroff.md)
- [HandlePowerOn](kernel/ioscsiprotocolservices/1810154-handlepoweron.md)
- [HandleProtocolServiceFeature](kernel/ioscsiprotocolservices/1810168-handleprotocolservicefeature.md)
- [HandleTargetReset](kernel/ioscsiprotocolservices/1810176-handletargetreset.md)
- [init](kernel/ioscsiprotocolservices/1810187-init.md)
- [InitializePowerManagement](kernel/ioscsiprotocolservices/1810204-initializepowermanagement.md)
- [IsProtocolServiceSupported](kernel/ioscsiprotocolservices/1810217-isprotocolservicesupported.md)
- [LogicalUnitReset](kernel/ioscsiprotocolservices/1810234-logicalunitreset.md)
- [ProcessCompletedTask](kernel/ioscsiprotocolservices/1810248-processcompletedtask.md)
- [RegisterSCSITaskCompletionRoutine](kernel/ioscsiprotocolservices/1810264-registerscsitaskcompletionroutin.md)
- [RejectSCSITasksCurrentlyQueued](kernel/ioscsiprotocolservices/1810276-rejectscsitaskscurrentlyqueued.md)
- [RejectTask](kernel/ioscsiprotocolservices/1810289-rejecttask.md)
- [RetrieveNextSCSITaskFromQueue](kernel/ioscsiprotocolservices/1810300-retrievenextscsitaskfromqueue.md)
- [SendNotification_DeviceRemoved](kernel/ioscsiprotocolservices/1810317-sendnotification_deviceremoved.md)
- [SendNotification_VerifyDeviceState](kernel/ioscsiprotocolservices/1810332-sendnotification_verifydevicesta.md)
- [SendSCSICommand](kernel/ioscsiprotocolservices/1810345-sendscsicommand.md)
- [SendSCSITasksFromQueue](kernel/ioscsiprotocolservices/1810363-sendscsitasksfromqueue.md)
- [SetAutoSenseData(SCSITaskIdentifier, SCSI_Sense_Data *)](kernel/ioscsiprotocolservices/1810382-setautosensedata.md)
- [SetAutoSenseData(SCSITaskIdentifier, SCSI_Sense_Data *, UInt8)](kernel/ioscsiprotocolservices/1810397-setautosensedata.md)
- [SetProtocolLayerReference](kernel/ioscsiprotocolservices/1810411-setprotocollayerreference.md)
- [SetRealizedDataTransferCount](kernel/ioscsiprotocolservices/1810431-setrealizeddatatransfercount.md)
- [SetTaskExecutionMode](kernel/ioscsiprotocolservices/1810455-settaskexecutionmode.md)
- [SetTaskState](kernel/ioscsiprotocolservices/1810476-settaskstate.md)
- [start](kernel/ioscsiprotocolservices/1810514-start.md)
- [TargetReset](kernel/ioscsiprotocolservices/1810537-targetreset.md)
- [TicklePowerManager](kernel/ioscsiprotocolservices/1810572-ticklepowermanager.md)