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 Lenovo Storage V series system. LUs that are accessed by hosts can be configured differently.

Table 1. HSG80 controller LU settings supported by the Lenovo Storage V series system
Option	HSG80 controller default setting	Lenovo Storage V series 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 Lenovo Storage V series nodes.