Prevent / allow media removal (1eh), Prevent, Allow – Dell PowerVault TL4000 User Manual

Page 63: Media, Removal, 1eh)

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PREVENT

/

ALLOW

MEDIA

REMOVAL

(1Eh)

The

PREVENT

/

ALLOW

MEDIA

REMOVAL

commands

enable

or

disable

removing

cartridges

from

the

media

changer.

A

prevent

condition

inhibits

the

media

changer

to

remove

magazines

and

open

the

Import/Export

element.

A

prevent

condition

of

the

media

changer

shall

not

affect

an

UNLOAD

command

issued

to

the

tape

drive.

Also

a

prevent

condition

shall

not

inhibit

a

front

panel

LOAD

of

a

cartridge

when

the

tape

drive

is

empty.

A

prevent

condition

is

cleared

when

all

initiators

issue

the

Prevent

Allow

Medium

Removal

command

with

the

Prevent

field

set

to

0

(allow

cartridge

removal).

The

prevent

condition

is

also

cleared

after

a

power

on

and

after

a

SCSI

Bus

reset.

Bit

7

6

5

4

3

2

1

0

Byte

0

Operation

Code

(1Eh)

1

LUN

Reserved

2

Reserved

3

Reserved

4

Reserved

Prevent

5

Control

Field

descriptions:

Prevent:

When

this

bit

is

set,

opening

of

the

Import/Export

element

and

unlocking

of

the

magazine

functions

are

disabled.

When

the

Prevent

bit

is

cleared

opening

of

the

Import/Export

element

and

the

unlocking

of

the

magazine

functions

are

enabled.

Chapter

3.

Supported

SCSI

Commands

3-49