Dell Compellent Series 30 - Manual (Page 62)

56 Storage Center System Setup Guide
Glossary
HBA Type
In the Storage Center, there are two HBA types: Fibre Channel and iSCSI.
Hot Spare
A hot spare disk is a backup disk. In the event that an active disk within the array fails, the
controller makes the hot spare part of the active array and rebuilds data on the fly.
Host Bus Adapter
See HBA
I
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 Fibre Channel.
M
Management IP Address
Address used to connect to a Storage Center. Each controller in a clustered-controller
environment has its own IP address, but the management IP address remains constant to
provide consistent management access to the Storage Center.
Managed Disks
Disks that are prepared to accept RAID protected data, across which data is striped and
from which volumes are created.
Mapping (Volume to Server)
A mapping makes a volume accessible to a server. Once the map is established, the
volume appears to the server as a single, local disk drive of the specified size.
N
Netmask
A 32-bit mask used to divide an IP address into subnets and specify the hosts available to
the network.