Dot Hill Systems 200 manual Reliability, Availability and Serviceability

FIGURE 3: Typical Sequence of Installation Steps

Reliability, Availability and Serviceability

Comprehensive reliability, availability and serviceability (RAS) are assured within SANnet II 200 SCSI arrays. Proven low voltage differential (LVD) signaling across all disk and host SCSI buses keeps data transfers reliable. Flexible support for RAID levels 0, 1, 0+1, 3, 5, 3+0 and 5+0, plus global and dedicated spare disks provide powerful choices for protecting valuable information. Every FRU is hot-swappable or hot-serviceable to virtually eliminate downtime, plus critical FRUs operate in redundant pairs.

	Base Unit	Base Unit	Expansion Unit
	with Redundant	with Single Controller	(no controllers)
	Controllers
Controller Modules	Hot-swappable	Hot-serviceable	Not applicable
Disk Modules	Hot-swappable	Hot-swappable	Hot-swappable
Power and Cooling	Hot-swappable	Hot-swappable	Hot-swappable
Modules
Event Management	Hot-swappable	Hot-swappable	Not applicable
Modules
SCSI Modules	Hot-serviceable	Hot-serviceable	Hot-serviceable
Termination Modules	Hot-serviceable	Hot-serviceable	Not applicable

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