Seagate ST936751SS, ST973451SS manual Inquiry data, Savvio inquiry data, Mode Sense data

9.3.1Inquiry data

Table 8 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual.

Table 8:	Savvio inquiry data
Bytes	Data (hex)
0-15	00	00	03**	12	8B	00	PP	0A	53	45	41	47	41	54	45	20	Vendor ID
16-31	[53	54	39	37	33	34	35	31	53	53	20	20	20	20	20	20	Product ID
32-47	R#	R#	R#	R#	S#	S#	S#	S#	S#	S#	S#	S#	00	00	00	00
48-63	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00
64-79	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00
80-95	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00	00
96-111	00	43	6F	70	79	72	69	67	68	74	20	28	63	29	20	32*	*Copyright
112-127	30*	30*	36*	20	53	65	61	67	61	74	65	20	41	6C	6C	20	notice
128-143	72	69	67	68	74	73	20	72	65	73	65	72	76	65	64	20

*Copyright year (changes with actual year).

**SCSI Revision support. See the appropriate SPC release documentation for definitions. PP 10 = Inquiry data for an Inquiry command received on Port A.

30 = Inquiry data for an Inquiry command received on Port B.

R#	Four ASCII digits representing the last four digits of the product firmware release number.
S#	Eight ASCII digits representing the eight digits of the product serial number.
[ ]	Bytes 16 through 25 reflect model of drive. The table above shows the hex values for Model ST973451SS.
	Refer to the values below for the values of bytes 16 through 25 of you particular model:
	ST973451SS	53	54	39	37	33	34	35	31	53	53
	ST936751SS	53	54	39	33	36	37	35	31	53	53

9.3.2Mode Sense data

The Mode Sense command provides a way for the drive to report its operating parameters to the initiator. The drive maintains four sets of mode parameters:

1.Default values

Default values are hard-coded in the drive firmware stored in flash E-PROM (nonvolatile memory) on the drive’s PCB. These default values can be changed only by downloading a complete set of new firmware into the flash E-PROM. An initiator can request and receive from the drive a list of default values and use those in a Mode Select command to set up new current and saved values, where the values are change- able.

2.Saved values

Saved values are stored on the drive’s media using a Mode Select command. Only parameter values that are allowed to be changed can be changed by this method. Parameters in the saved values list that are not changeable by the Mode Select command get their values from default values storage.

When power is applied to the drive, it takes saved values from the media and stores them as current val- ues in volatile memory. It is not possible to change the current values (or the saved values) with a Mode Select command before the drive achieves operating speed and is “ready.” An attempt to do so results in a “Check Condition” status.

Savvio 15K SAS Product Manual, Rev. B 49