HP/HPE HDD Backplane FRU Information (Type 236)

Source: dmidecode, dmioem.c. No dumps of the data corpus hold the structure.

Describes a drive backplane: where its FRU is, and the SAS expander and the drive bays it has. The structure is decoded up to Gen10 Plus, from which the bay counts behind the ports and the name are deprecated. The shortest structures end after the NVRAM ID, at 0x09.

Table 1. HP/HPE HDD Backplane FRU Information structure
Offset	Version	Name	Length	Value	Description
`0x00`	2.0+	Type	`BYTE`	`236`	HP/HPE HDD Backplane FRU Information indicator
`0x01`	2.0+	Length	`BYTE`	Varies	Length of the structure
`0x02`	2.0+	Handle	`WORD`	Varies
`0x04`	2.0+	FRU I2C Address	`BYTE`	`NUMBER`	I2C address of the FRU, shifted left by one bit
`0x05`	2.0+	Box Number	`WORD`	`NUMBER`
`0x07`	2.0+	NVRAM ID	`WORD`	`NUMBER`
`0x09`	2.0+	SAS Expander WWID	`QWORD`	`NUMBER`
`0x11`	2.0+	Total Bays	`BYTE`	`NUMBER`	Number of the SAS drive bays
`0x12`	2.0+	A0 Bays	`BYTE`	`NUMBER`	Number of the SAS drive bays behind port `0xA0`
`0x13`	2.0+	A2 Bays	`BYTE`	`NUMBER`	Number of the SAS drive bays behind port `0xA2`
`0x14`	2.0+	Name	`BYTE`	`STRING`	Name of the backplane