Dot Hill Systems 200 manual Advanced Features, RAID5, RAID3

Supported memory type	SDRAM memory for enhanced performance. Fast page memory
	with parity for enhanced data security. ECC-protected.
Read-ahead operation	Intelligent dynamic read-ahead operation for sequential data
	accessing
Multi-threaded operation	Yes
Scatter/gather supported	Supported
I/O sorting	Supported. Optimized I/O sorting for enhanced performance
Variable stripe size	RAID5:
	Optimization for random I/O (32k), optimization for sequential
	I/O (128k), user selectable.
	RAID3:
	Optimization for random I/O (4k), optimization for sequential I/O
	(16k), user selectable.
Advanced Features
Drive low-level format	Supported
Drive identification	Supported
	Force the drive to light on the activity indicator for user to
	recognize the correct drive.
Drive information listing	Supported
	Drive vendor name, model number, firmware revision, capacity
	(blocks), serial number, narrow/wide negotiations and current
	SCSI speed.
Drive read/write testing	Supported
Configuration on disk	Supported
	The logical drive information is recorded on drive media.
Save/restore NVRAM to/from disks	Supported
	Save all the settings stored in the controller NVRAM to the logical
	drive members
Save/restore NVRAM to/from file	Supported
	Save all the settings stored in the controller NVRAM to a file via
	GUI or CLI on user’s computer
Host LUN geometry & user configurable	Capacity <64GB: Head=63, Sector=32, Cylinder=?
default geometry	(depends on capacity)
	64GB<capacity<128GB:Head=64, Sector=64, Cylinder=?
	(depends on capacity)
	128GB<capacity<256GB: Head=127, Sector=64, Cylinder=?
	(depends on capacity)
	256GB<capacity<512GB: Head=127, Sector=127, Cylinder=?
	(depends on capacity)
	512GB<capacity<1TB: Head=255, Sector=64, Cylinder=?
	(depends on capacity)
	1TB<capacity: Head=225, Sector=225, Cylinder=?
	(depends on capacity)
User configurable geometry range	Sector: 32,64,127,255 or variable

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