User Manual

SCSI Commands Reference Manual, Rev. J 435
www.seagate.com Parameters for direct access devices
5.3.25 Port Control Mode page (19h) for FC
The Fibre Channel Interface Control page controls options relevant to Fibre Channel protocol. It is intended for the control of
features unique to Fibre Channel protocol that are not suitable for control by login or other techniques defined for Fibre
Channel.
Both the current and saved values of Mode page 19h, byte 3, are changeable using the Mode Select command. When the saved
value of Byte 3 is changed, a new value is stored in nonvolatile (flash) memory, not on disk, and is reported during a Mode Sense
command when either the current or saved value is requested.
The current value of Byte 3 may be modified using Mode Select command any number of times. The saved value of Byte 3 may
be modified using the Mode Select command up to 32 times. After 32 modifications, additional attempts to modify will result in
a response of Illegal Request (05) with Error Code of 2600 (Invalid field in parameter list) and the Sense Key pointing to byte 3 as
the offending parameter. Additional updates of Byte 3 saved value may be accomplished by downloading new microcode that
supports Fibre Channel Interface Control page 19h. After a download, the saved value of Byte 3 may be updated 31 more times
or 32 times if the value is 0 at the time of download.
The saved and current value of Byte 3 is preserved through the download.
PS (Parameter Savable)
The PS bit is defined in 5.3.5.
SPF bit
The SPF bit shall be set to zero for access to the short format mode page.
PAGE CODE field
The PAGE CODE field is described in 5.2.2.
Page Length byte
The length of the Fibre Channel Interface Control page in bytes (06h). If the allocation length is too small to transfer all of the page, the page
length is not adjusted to reflect the truncation.
Table 408 Fibre Channel Interface Control page (19h)
Bit
Byte
7 6 5 4 3 2 1 0
0
PS SPF (0b) PAGE CODE (19h)
1
PAGE LENGTH (06h)
2
Reserved PROTOCOL IDENTIFIER (FCP = 0h)
3
DTFD PLPB DDIS DLM RHA ALWLI DTIPE DTOLI
4
Reserved
5
Reserved
6
Reserved
7
SEQUENCE INITIATIVE RESOURCE RECOVERY TIMEOUT VALUE (RR_TOVSEQ_INIT)