Compaq HSZ80 manual Resulting Cache Policies and ECB Status

				1–25
	Table 1–8 Cache Policies and Cache Module Status (Continued)
Cache Module Status			Cache Policy
Cache A	Cache B	Unmirrored Cache		Mirrored Cache
Cache	Good	Same as for DIMM failure.		Data integrity: Controller A recovers all
Board				of its write-back data from the
Failure				mirrored copy on cache B.
				Cache policy: Both controllers support
				write-through caching only. Controller
				B cannot execute mirrored writes
				because cache module A cannot
				mirror controller B’s unwritten data.
				Failover: No.
	Table 1–9 Resulting Cache Policies and ECB Status
Cache Module Status			Cache Policy
Cache A	Cache B	Unmirrored Cache		Mirrored Cache
At least	At least	Data loss: No.		Data loss: No.
50%	50%	Cache policy: Both controllers		Cache policy: Both controllers continue
charged	charged
		continue to support write-back		to support write-back caching.
		caching.		Failover: No.
		Failover: No.

Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide