DCU Bootability
With Mixed EMSs and HDD Card Cages
Note - Revised EMS and HDD card cage were introduced independently
of the releases of the SPARC M5-32 and SPARC M6-32 CMUs and servers,
so the revised EMS and HDD card cage are known as second-generation
(2nd Gen). Consequently, the original SPARC M5-32 EMS and HDD card
cage became known as first-generation (1st Gen).
This table summarizes possible combinations of components.
|
|
|
|
|
|
1 |
M5 |
1st Gen |
1st Gen |
Compatible |
DCU boots |
2 |
M5 |
2nd Gen |
2nd Gen |
Compatible |
DCU boots |
3 |
M6 |
1st Gen |
1st Gen |
Compatible |
DCU boots |
4 |
M6 |
2nd Gen |
2nd Gen |
Compatible |
DCU boots |
5 |
M5 |
1st Gen |
2nd Gen |
Partially compatible |
Boots with warning |
6 |
M5 |
2nd Gen |
1st Gen |
Partially compatible |
Boots with warning |
7 |
M6 |
1st Gen |
2nd Gen |
Partially compatible |
Boots with warning |
8 |
M6 |
2nd Gen |
1st Gen |
Partially compatible |
Boots with warning |
9 |
M5 with M6 |
Any |
Any |
Incompatible CMUs |
DCU cannot boot |
10 |
Any |
1st Gen with 2nd Gen |
Any |
Incompatible EMSs |
DCU cannot boot |
11 |
Any |
Any |
1st Gen with 2nd Gen |
Incompatible HDD cages |
DCU cannot boot |
|
Supported combinations (rows 1,
2, 3, and 4): EMSs and HDD card cages in a DCU are all
of the same generation. The DCU can boot normally.
Unsupported combinations (rows 5,
6, 7, and 8): The system detects 1st and 2nd Gen differences
and generates a warning, but the DCU can still boot. See EMS and HDD Cage Incompatibility.
Unsupported combinations (rows 9,
10, and 11): Mixing generations within a type stops a DCU
from booting. Mixing CMUs in a DCU is not allowed. Mixing EMSs in
a DCU is not allowed. Mixing HDD cages in a DCU is not allowed.
Use part numbers to identify 1st and 2nd Gen parts in a DCU.
See Identifying 1st Gen and 2nd Gen Components.