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10 prevent/allow medium removal command – FUJITSU MCJ3230SS User Manual

Page 105

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4.3 SCSI Commands

C156-E224-01EN

4-31

4.3.10 PREVENT/ALLOW MEDIUM REMOVAL command

Table 4.48 PREVENT/ALLOW MEDIUM REMOVAL command

Bit

Byte

7

6

5

4

3

2

1

0

0

Operation Code (1Eh)

1

LUN

Reserved

2-3

Reserved

4

Reserved

Prevent

5

Reserved

The PREVENT/ALLOW MEDIUM REMOVAL command enables or disables
media ejection from the device.

If the Prevent bit is 0, ejection is enabled. If the Prevent bit is 1, ejection is
disabled.

At power-on, media ejection is enabled by default.

When unwritten data remains in the write cache, media ejection is enabled after
the data is written to the media.

SCSI Reset or Bus Device Reset releases the disabled state and enables ejection.

Table 4.49 Responses to Prevent, Allow, and Eject

Operation

Status at

operation

If no media is loaded

If media is loaded

Enabled

No error

No error

Prevent = 0

Disabled

No error

No error

Enabled

No error

No error.

Media ejection is
disabled.

Prevent = 1

Disabled

No error

No error

Enabled

No error

No error.

The cartridge is
ejected.

Eject
(Ejection by
START/STOP UNIT
command)

Disabled

Error:

SENSE KEY 5
ASC/ASCQ 5302

Error:

SENSE KEY 5
ASC/ASCQ 5302

Enabled

No status change

The cartridge is ejected.

Eject
(Ejection by the eject
switch)

Disabled

No status change

No status change; media
ejection remains disabled.