PlatinumRAID Owner’s Manual
5.2.1 QAS
The PlatinumRAID supports QAS (Quick
Arbitrate and Select) function of the Ultra320
SCSI protocol. When implemented with a
compatible Host Bus Adapter, QAS reduces
SCSI command overhead and may provide
improved performance. QAS is optional and, when enabled, requires the initiation and detection
of a QAS REQUEST message from a compatible Ultra320 host bus adapter before starting.
5.2.2 Auto Speed Control
The PlatinumRAID can automatically reduce SCSI speed if the SCSI host connection is not
stable at the negotiated speed. This option is enabled by default, and should not be modified
unless instructed by MicroNet Technical Support.
5.2.3 2TB CDB Select
Standard SCSI allows for 12 byte Command Descriptor Blocks (CDB), limiting the maximum
addressable storage to 2TB per lun. If the total usable capacity of the RAIDset exceeds 2TB,
an additional volume must be defined. On host operating systems supporting extended (16
byte) CDB addressing, The PlatinumRAID U320 can be set to 16 byte CDB operation to allow
up to 256TB maximum addressable capacity per LUN. Please verify that your operating system
and host bus adapter support 16 byte CDB before enabling this feature, as data loss and data
corruption may occur if this feature is enabled with an incompatible system!
WARNING! 1Byte CDB should only be used
with a compatible Ultra0 Host Bus Adapter.
Incompatible operating systems or host bus
adapters may result in data corruption!
!
6-RAID Controls-Web Interface