HP Surestore Disk Array 12h - And FC60 Service Manual page 268

Glossary
Reload
Relocated Blocks
Restart
SCSI
SCSI HBA
SCSI ID
SDTR
268
Traditionally, RAID systems required the entire user data set to be
rewritten in order to add more capacity or adjust the RAID mode. The
disk array does not require a Reload to make use of additional disk
space because of the automatic Balancing and Dynamic Data
Migration inherent in HP AutoRAID
Relocated Blocks are data blocks that are relocated from RAID 0/1 to
RAID 5 (or vice versa) when performing a write.
The process of bringing the array back on line. Typically done
following a Shutdown, a restart copies vital configuration information
from the disks to NVRAM on the array controller.
SCSI stands for "Small Computer System Interface." This is an
industry-standard interface that defines the mechanical, electrical, and
functional requirements for connections and communication between
small computers and disk drives and other peripherals.
The SCSI ID (identification or address) uniquely identifies the device
on the SCSI channel.
The SCSI HBA (Host Bus Adapter) is the card installed in the server
that provides the connection for the disk array. The SCSI HBA
manages the transfer of data between the server and the disk array.
Multiple SCSI devices can be connected to each HBA.
The SCSI ID is a unique number assigned to each device connected to a
SCSI bus. This number is used by the HBA to address each device on
the bus. Each controller in the disk array is assigned its own SCSI ID.
SDTR stands for "Synchronous Data Transfer Request." SDTR
controls the data rate on the SCSI bus used by the host and the array.
SDTR also determines the negotiation protocol of the host. If SDTR is
enabled, the array will initiate negotiation protocol; if disabled, the host
will initiate negotiation protocol. In either case, the disk array will
always respond to any requests made by the host.
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Array Technology.