Datasheet

1.11 Enclosure Service Interface (ESI)
C141-C008 1-113
Table 1.40 Port parameters
Bit
Byte
7 6 5 4 3 2 1 0
0 0 0 0 0 ESI Page (00h)
1 0 0 0 0 Action Code (06h)
2
3
(MSB) Page Length (06h)
(LSB)
4
Drive Capabilities
5
Reserved
LSP
CHG
6 0 0 Port A
Link
Fail
Port A
Bypass
0 Port A Link Rate
7 Reserved
8 0 0 Port B
Link
Fail
Port B
Bypass
0 Port B Link Rate
9 Reserved
• Drive Capabilities - This is a bit significant field that indicates which Device
Control Codes as defined in SFF 8045 are supported by the drive. A one in a
bit position indicates the corresponding Device Control Code is supported,
e.g. a one in bits 7 and 6 indicates that Device Control Codes 7 and 6 are
supported. This indicates the drive supports Fibre Channel link rates of 1 and
2 GHz.
• LSP CHG (Link Status Page Change) - A one in this field indicates the data
in the Link Status Page has changed since the enclosure last read the Link
Status Page. A zero indicates the Link Status Page data has not changed.
When the enclosure reads the Link Status Page, this bit is cleared.
• Port Link Fail - A one in this field indicates the drive is currently detecting a
Loop Failure condition as defined in FC-AL for the port.
• Port Link Rate - This field is the value defined for the Fibre Channel link rate
by the Device Control Code inputs in SFF 8045, i.e., 7 represents 1Ghz.
• Port Bypass - A one in this field indicates the drive is asserting the -ENBL
BYPCH signal in the SCA connector for the port. A zero indicates the drive
is not requesting bypass.