1# ScsiPeripheral_InquiryRequest 2<!--Kit: Driver Development Kit--> 3<!--Subsystem: Driver--> 4<!--Owner: @lixinsheng2--> 5<!--Designer: @w00373942--> 6<!--Tester: @dong-dongzhen--> 7<!--Adviser: @w_Machine_cc--> 8 9## Overview 10 11Defines the request structure of the **inquiry** command. 12 13**Since**: 18 14 15**Related module**: [SCSIPeripheralDDK](capi-scsiperipheralddk.md) 16 17**Header file**: [scsi_peripheral_types.h](capi-scsi-peripheral-types-h.md) 18 19## Summary 20 21### Member Variables 22 23| Name| Description| 24| -- | -- | 25| uint8_t pageCode | **Page code** field. Set this field if you want to obtain certain types of device information. When an **Inquiry** command with a specific page code is run, the device returns details related to the page code. If the page code is set to **0x00**, it indicates that the standard inquiry data rather than the data of specific pages is requested.| 26| uint16_t allocationLength | **Allocation length** field used to specify the size of the buffer prepared by the request initiator (usually the host) for the response data.| 27| uint8_t control | **Control** field used to specify control information.| 28| uint8_t byte1 | First byte of the CDB.| 29| uint32_t timeout | Timeout duration, in ms.| 30