Speed matching, Channel calibration, Speed – Dell TL2000 User Manual

Page 28: Matching, Channel, Calibration, Library, Drive, Sled, Without

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Speed

Matching

To

improve

system

performance,

the

Ultrium

3

and

Ultrium

4

Tape

Drive

uses

a

technique

called

speed

matching

to

dynamically

adjust

its

native

(uncompressed)

data

rate

to

the

slower

data

rate

of

the

attached

server.

Channel

Calibration

The

channel

calibration

feature

of

the

Ultrium

3

and

Ultrium

4

Tape

Drive

customizes

each

read/write

data

channel

for

optimum

performance.

The

customization

enables

compensation

for

variations

in

the

recording

channel

transfer

function,

media

characteristics,

and

read/write

head

characteristics.

a77ug008

Figure

1-7.

Library

drive

sled

without

ESD

springs

(SCSI

sled

shown)

a77ug202

1

Figure

1-8.

Library

drive

sled

with

ESD

springs

[1]

(SAS

sled

shown)

1-10

Dell

PowerVault

TL2000

Tape

Library

and

TL4000

Tape

Library

User's

Guide