Avago Technologies AcceleRAID 170LP - Manual (Page 70)

G-12 AcceleRAID 170LP Installation Guide
Global Hot Spare
An extra, physical disk drive placed in an array and used to replace a failed
drive in any disk array. A global spare automatically takes the place of a
failed drive. See also Auto Swap, Dedicated Hot Spare, and Hot Spare.
Hard Disk
A magnetically coated disk substrate that spins inside a disk drive and is
used as the storage medium for digital data.
Hard Disk Drive (HDD)
The main data storage unit of a computer.
HDM
Hardware Driver Module, a driver set required for SCSI adapters for use in
an I
2
O environment.
Host
Any computer system to which disks are attached and accessible for data
storage and I/O.
Host Bus Adapter (HBA)
An I/O adapter that connects a host I/O bus to the host’s storage memory
system.
Host I/O Bus
An I/O bus used to connect a host computer to storage systems or storage
devices.
Hot Plug
The process of adding or removing a device from a bus while transactions
involving other devices are occurring over the bus. See also PCI Hot Plug.