Dell Memory Module Identifiers (Type 223)

Source: reverse engineered from the dumps of the data corpus.

Tells the manufacturer and the serial number of the memory modules, as their serial presence detect (SPD) data holds them, which the memory devices (type 17) of the older systems carry no fields for, e.g. in dell/poweredge-400sc.bin and dell/optiplex-gx110.bin. Each memory device is referred to by one record, and the records of the sockets which hold no module usually carry bytes of 0xFF: PowerEdge 1300 repeats the identifiers of a module in the record of an empty socket.

The structures whose identifiers are of another length than 12 bytes are not known, and are left undecoded.

Table 1. Dell Memory Module Identifiers structure
Offset	Version	Name	Length	Value	Description
`0x00`	2.0+	Type	`BYTE`	`223`	Dell Memory Module Identifiers indicator
`0x01`	2.0+	Length	`BYTE`	Varies	Length of the structure
`0x02`	2.0+	Handle	`WORD`	Varies
`0x04`	2.0+	Identifiers Length	`BYTE`	`12`	Length of the identifiers of a module, which follow the handle of its memory device
`0x05`	2.0+	Modules	Varies	Varies	Modules, see Modules, which run to the end of the structure

1. Dell Memory Module Identifiers — Modules

Table 2. Dell Memory Module Identifiers: Module
Offset	Name	Length	Value	Description
`0x00`	Handle	`WORD`	Varies	Handle of the memory device (type 17) of the socket
`0x02`	Manufacturer	8 `BYTE`	Varies	Identifier of the manufacturer, normally its JEDEC identifier, whose leading bytes of `0x7F` are continuation codes, e.g. `CE` for Samsung, `2C` for Micron, or `7F 98` for Kingston
`0x0A`	Serial Number	4 `BYTE`	Varies	Serial number of the module