Adaptec 3210S User Guide - Page 120

Controllers, Channels, Disk Drives - scsi raid controller

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Adaptec Storage Manager Pro User's Guide Controllers A controller is a hardware device that performs input/output (I/O) functions. Controllers also perform other functions such as read and write caching and RAID management. Also known as an adapter, embedded storage controller, Host Bus Adapter (HBA), or subsystem. Channels A channel is any path used for the transfer of data and control information between storage devices and a storage controller. Each controller's channel is identified by a number. Channels in Storage Manager Pro are numbered starting with number 0. Also known as a bus. Disk Drives The term disk drive (or drive) refers to the physical disk drives that store your data. Depending on your controller, you may use either SCSI or ATA drives. In Storage Manager Pro, the SCSI drives are identified by a disk ID, which is in the format: 2:04:0 Channel Number SCSI ID Logical Unit Number (LUN) I Channel Number-Indicates to which channel (bus) on the controller the SCSI drive is attached. I SCSI ID (also known as target ID)-Identifies the drive on the SCSI channel. I Logical Unit Number (LUN)-The number assigned to a subdevice (logical unit) of a SCSI device, which is usually zero for a disk drive. A-2

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A-2
Adaptec Storage Manager Pro User
’
s Guide
Controllers
A
controller
is a hardware device that performs input/output (I/O)
functions. Controllers also perform other functions such as read and
write caching and RAID management. Also known as an adapter,
embedded storage controller, Host Bus Adapter (HBA), or
subsystem.
Channels
A
channel
is any path used for the transfer of data and control
information between storage devices and a storage controller. Each
controller
’
s channel is identified by a number. Channels in Storage
Manager Pro are numbered starting with number 0. Also known as a
bus.
Disk Drives
The term
disk drive
(or drive) refers to the physical disk drives that
store your data. Depending on your controller, you may use either
SCSI or ATA drives.
In Storage Manager Pro, the SCSI drives are identified by a disk ID,
which is in the format:
■
Channel Number
—
Indicates to which channel (bus) on the
controller the SCSI drive is attached.
■
SCSI ID (also known as
target ID
)
—
Identifies the drive on the
SCSI channel.
■
Logical Unit Number (LUN)
—
The number assigned to a
subdevice (logical unit) of a SCSI device, which is usually zero
for a disk drive.
2:04:0
Channel Number
SCSI ID
Logical Unit Number
(LUN)