LU settings for HP MA and EMA systems

Logical unit (LU) settings are configurable at the LU level.

Table 1 describes the options that must be set for each LU that is accessed by the SAN Volume Controller system. LUs that are accessed by hosts can be configured differently.

Table 1. HSG80 controller LU settings supported by the SAN Volume Controller system
Option	HSG80 controller default setting	SAN Volume Controller required setting
TRANSFER_RATE_REQUESTED	20MHZ	Not applicable
TRANSPORTABLE/ NOTRANSPORTABLE	NOTRANSPORTABLE	NOTRANSPORTABLE
ENABLE_ACCESS_PATH	ENABLE_ACCESS_ PATH=ALL	ENABLE_ACCESS_ PATH=ALL
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/ NOWRITEBACK_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 SAN Volume Controller nodes.