---
title: UnmapTruncateAndAccumulate
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ioscsiblockcommandsdevice/1792131-unmaptruncateandaccumulate
---

# UnmapTruncateAndAccumulate

## Declaration

```occ
bool UnmapTruncateAndAccumulate(IOBlockStorageDeviceExtent *extentDispatchList, UInt32 blockDescriptorCount, UInt32 *unmapLBACount, IOBlockStorageDeviceExtent *mergedExtent);
```