Scsi Tid Map For Fibre Channel Adapters; Scsi Tid Map - HP StorageWorks XP10000 - Disk Array Configuration Manual

Device type
OPEN-L*n
OPEN-8/9/E-CVS OPEN-V
OPEN-8/9/E*n-CVS
OPEN-V*n (n = 2 to
36)
N1 = [ VCS volume capacity (in MB) from Remote Console PC ] × nN2 =
next integer) Example: CVS volume capacity is 6000 MB for OPEN-9*22-CVS volume:N1 = 6000 × 22 =
132000N2 =

SCSI TID map for Fibre Channel adapters

When an arbitrated loop (AL) is established or reestablished, the port addresses are assigned
automatically to prevent duplicate TIDs. With the SCSI over Fibre Channel protocol (FCP), there is no
longer a need for target IDs in the traditional sense.
SCSI is a bus-oriented protocol requiring each device to have a unique address because all commands
go to all devices. For Fibre Channel, the AL-PA is used instead of the TID to direct packets to the
desired destination.
Unlike traditional SCSI, when control of the loop is acquired, a point-to-point connection is established
from initiator to target. To enable transparent use of FCP, the operating system maps a TID to each
AL-PA.
The host maps SCSI protocol to Fibre Channel protocol and detects and accesses Fibre
Channel-connected devices using device files (/dev/dsk/c*t*d* and /dev/rdsk/c*t*d*) in
the same way as for SCSI-connected devices. The device files for Fibre Channel-connected devices
are configured in a different way from SCSI-connected devices, because Fibre Channel supports 126
addresses per path while SCSI supports 16 TIDs per path.
The following table identifies the fixed mappings between the TID (drive) values assigned by the
operating system and the Fibre Channel native addresses (AL_PA/SEL_ID) for Fibre Channel adapters.
The controller number (the dks value in /dev/dsk/dks*d*l*s*) depends on the server configuration,
and a different value is assigned per each column.
The mapping cannot be done when these conditions exist:
Disk array devices and other types of devices are connected in the same loop
Information for unused devices remains in the server system
Multiple ports participate in the same arbitrated loop
Table 12 SCSI TID map
t value AL-PA
0 EF
1 E8
42 Disk array supported emulations
n = 36
n = 2 to 3
70 to 119731(MB) × N1
119732 to (MB) × N1
132000/8 = 16500
AL-PA AL-PA
CD B2
CC B1
Physical extent
size (PE)
8
default
default
8
8
AL-PA AL-PA AL-PA
98 72 55
97 71 54
Max physical extent size
(MPE)
62518
default
default
default
N2
N1 / PE ( means round up to
AL-PA AL-PA
3A 25
39 23