American Megatrends MegaRAID Express 500 - Manual (Page 49)

Chapter 4 Features 35
SCSI Connectors
MegaRAID Express 500 has two types of SCSI connectors:
•
a 68-pin high density internal connector and
•
a 68-pin external ultra-high-density connector.
Both connector types can be used for the SCSI channel.
SCSI Termination
MegaRAID Express 500 uses active termination on the SCSI bus conforming to
Alternative 2 of the SCSI-2 specifications. Termination enable/disable is
automatic through cable detection.
SCSI Firmware
The MegaRAID Express 500 firmware handles all RAID and SCSI command
processing and also supports:
Feature Description
Disconnect/
Reconnect Optimizes SCSI Bus seek.
Tagged Command
Queuing Multiple tags to improve random access
Scatter/Gather Multiple address/count pairs
Multi-threading Up to 255 simultaneous commands with elevator sorting and
concatenation of requests per SCSI channel
Stripe Size Variable for all logical drives: 2 KB, 4 KB, 8 KB, 16 KB, 32
KB, 64 KB, or 128 KB.
Rebuild Multiple rebuilds and consistency checks with user-
definable priority.