Advanced features, Dvanced, Eatures – Dot Hill Systems SANnet II 200 User Manual
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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 
default geometry
Capacity <64GB: Head=63, Sector=32, Cylinder=? 
(depends on capacity) 
64GB
128GB
256GB
512GB
1TB
User configurable geometry range
Sector: 32,64,127,255 or variable
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