User Manual

SCSI Commands Reference Manual, Rev. J 357

www.seagate.com Parameters for direct access devices

PHY IDENTIFIER field

The PHY IDENTIFIER field specifies the phy identifier of the phy that is to perform or to stop performing a phy test function (i.e., the selected

phy). If the PHY IDENTIFIER field specifies a phy that does not exist, then the device server shall terminate the SEND DIAGNOSTIC command

with CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN PARAMETER

LIST.

SAS PHY LOG DESCRIPTOR LENGTH field

The SAS PHY LOG DESCRIPTOR LENGTH field indicates the number of bytes that follow in the SAS phy log descriptor and shall be

set to the value defined in Table 335. A SAS PHY LOG DESCRIPTOR LENGTH field set to 00h indicates that there are 44 additional

bytes.

NOTE Logical units compliant with SAS and SAS-1.1 only support a 48 byte SAS phy log descriptor.

ATTACHED DEVICE TYPE field

The ATTACHED DEVICE TYPE field indicates the type of device attached to this phy, and is defined in Table 336.

ATTACHED REASON field

The ATTACHED REASON field indicates the reason received from the attached device for the link reset sequence and is defined in

Table 337

PHY EVENT DESCRIPTOR (first) (see table 339). . .

. . . . . .

m-11

PHY EVENT DESCRIPTOR (last) (see table 339). . .

Table 336 Device type field

Code Description

001b

End device

010b

Expander device

011b

Expander device compliant with a previous version of the SAS standard

All others

Reserved

Table 335 SAS phy log descriptor

Bit

Byte

7 6 5 4 3 2 1 0