---
title: fLogicalUnitNumber
framework: scsiperipheralsdriverkit
role: symbol
role_heading: Instance Property
platforms: [driverkit 22.0+]
path: scsiperipheralsdriverkit/scsideviceoutparameters/flogicalunitnumber
---

# fLogicalUnitNumber

The SCSI logical unit number of the device that receives the command.

## Declaration

```occ
uint64_t fLogicalUnitNumber;
```

## See Also

### Setting command parameters

- [fTimeoutDuration](scsiperipheralsdriverkit/scsideviceoutparameters/ftimeoutduration.md)
- [fCommandDescriptorBlock](scsiperipheralsdriverkit/scsideviceoutparameters/fcommanddescriptorblock.md)
- [fRequestedByteCountOfTransfer](scsiperipheralsdriverkit/scsideviceoutparameters/frequestedbytecountoftransfer.md)
- [fBufferDirection](scsiperipheralsdriverkit/scsideviceoutparameters/fbufferdirection.md)
- [fDataTransferDirection](scsiperipheralsdriverkit/scsideviceoutparameters/fdatatransferdirection.md)
- [fSenseLengthRequested](scsiperipheralsdriverkit/scsideviceoutparameters/fsenselengthrequested.md)
- [fDataBufferAddr](scsiperipheralsdriverkit/scsideviceoutparameters/fdatabufferaddr.md)
- [fSenseBufferAddr](scsiperipheralsdriverkit/scsideviceoutparameters/fsensebufferaddr.md)