Logical unit (LU) settings are configurable at the LU level.
HSG80 controller LU settings supported by thesystem describes the options that must be set for each LU that is accessed by the system. LUs that are accessed by hosts can be configured differently.
| Option | HSG80 controller default setting | Required system setting |
|---|---|---|
| TRANSFER_RATE_REQUESTED | 20MHZ | Not applicable |
| TRANSPORTABLE/ NOTRANSPORTABLE | NOTRANSPORTABLE | NOTRANSPORTABLE |
| ENABLE_ACCESS_PATH | ENABLE_ACCESS_ |
ENABLE_ACCESS_ |
| DISABLE_ACCESS_PATH (See Note.) | NO DEFAULT | NO DEFAULT |
| IDENTIFIER/ NOIDENTIFIER | NOIDENTIFIER | Not applicable |
| MAX_READ_CACHE_SIZE | 32 | Not applicable |
| MAX_WRITE_CACHE_SIZE | 32 | 64 or higher |
| MAX_CACHED_TRANSFER_SIZE | 32 | Not applicable |
| PREFERRED_PATH/ NOPREFERRED_PATH | NOPREFERRED_PATH is set | Not applicable |
| READ_CACHE/ NOREAD_CACHE | READ_CACHE | Not applicable |
| READAHEAD_CACHE/ NOREADAHEAD_CACHE | READAHEAD_CACHE | Not applicable |
| RUN/ NORUN | RUN | RUN |
| WRITE_LOG/NOWRITE_LOG | NOWRITE_LOG | NOWRITE_LOG |
| WRITE_PROTECT/ NOWRITE_PROTECT | NOWRITE_PROTECT | NOWRITE_PROTECT |
WRITEBACK_CACHE/ |
WRITEBACK_CACHE | WRITEBACK_CACHE |
| Note: DISABLE_ACCESS_PATH can be used to disable access from specific hosts. It must always be overridden by using ENABLE_ACCESS_PATH=ALL on all connections to the system nodes. | ||