Dell Compellent Series 30 - Manual (Page 438)

430 Storage Center 5.5 System Manager User Guide
Host Bus Adapter
See HBA
I
Initiator
A source Storage Center system that initiates replication. Data is copied from an initiator to a Target System .
Instant Replay
See Data Instant Replay.
IO
Input/output. The process of moving data between a computer system's main memory and an external
device or interface such as a storage device, display, printer, or network connected to other computer
systems. IO is a collective term for reading, or moving data into a computer system's memory, and writing,
or moving data from a computer system's memory to another location.
iSCSI
iSCSI (Internet SCSI) is the specification that defines the encapsulation of SCSI packets over ethernet using
the TCP/IP transport protocol, or a protocol that enables transport of block data over IP networks, without
the need for a specialized network infrastructure, such as FC.
J
JBOD
Just a bunch of disks. An enclosure that contains storage disks, fans, and an HBA port with which it
connects to a controller.
L
LAN
Local Area Network
Leader Controller
In a dual controller system, the leader controller is the primary controller. Under ordinary circumstances, the
controllers share read/write duties, thus doubling IOs. In the event the peer controller fails, the lead
controller assumes the duties of both controllers. See Peer Controller.
Legacy Mode
Non-virtual port mode. in legacy mode, Fault Domains associate Primary and Reserved Front End ports to
each other as opposed to Virtual Mode where all front end ports can be part of the same fault domain.
Load Balancing
Referring to the ability to redistribute load (read/write requests) to an alternate path between server and
storage device, load balancing maintain high performance IO.