Fujitsu M2512A : Switch Settings Fujitsu M2512A : Switch Settings
PCA Layout All configurations marked * are default settings.
Switch SW1
Keys 1 2 3 SCSI ID
OFF* OFF* OFF* 0
OFF OFF ON 1
OFF ON OFF 2
OFF ON ON 3
ON OFF OFF 4
ON OFF ON 5
ON ON OFF 6
ON ON ON 7
SCSI bus parity check
Key 4 ON* Enabled
OFF Disabled
Synchronous data transfer request mode
Key 5 ON Enabled
OFF* Disabled
Changing this function will not affect asychronous transfers.
Device type
Key 6 ON Optical memory device (INQ = '07')
OFF* Direct access device (INQ = '00')
This determines what response the drive will give to an INQUIRY command.
Spindle automatic stop mode
Key 7 ON* Enabled
OFF Disabled
With the disk loaded, the spindle continues to rotate until
the START/STOP unit command instructs the spindle to stop. The
spindle automatic stop function comes into operation when the
host does not issue a command for about 30 minutes. If the host
issues a command after the spindle has stopped then the spindle
will start up and process the command without posting a not ready
state. 
This function greatly
reduces the amount of dust that can collect on the disk, however
it is not suitable for a system which requires a quick response
as the spindle takes several seconds to get up to speed. The access monitoring time and the
function itself can be changed or enabled via a MODE SELECT
command.
LED mode
Key 8 OFF* Mode 1
ON Mode 2
Mode 1 The LED lights when drive is positioning, reading, writing, loading, ejecting and during the power on test. At power-on test the LED will blink at 1 second intervals after detecting an error or 2 second intervals having detected a thermal error.
Mode 2 The LED lights only on power-on test and whilst waiting. Error detection and reporting is as for Mode 1.
Switch Bank SW2
Write cache mode.
Key 1 ON Enabled
OFF* Disabled
When enabled, a write error is reported at the completion of the next command. This can speed up write times but do ensure your system will respond correctly by knowing what data to resend.
Key 2 OFF* Not Used
Mac mode
Key 3 ON Enabled
OFF* Disabled
Because of the differing ways that both Apple Macintosh and PC hosts respond to the status of the drive, set this switch accordingly. Mac mode ON will disable the 'UNIT ATTENTION' reporting on power up and media change.
Verify after write mode
Key 4 ON Disabled
OFF* Enabled
When disabled, the performance of a write operation is improved by approximately 20%, however data integrity cannot be guaranteed.
SCSI level
Key 5 ON SCSI-2 mode
OFF* SCSI-1 mode (Compatible with M2511A)
SAVE DATA POINTER message mode
Key 6 OFF* SAVE DATA POINTER message posted before sending DISCONNECT message
ON No message sent before DISCONNECT message
Key 7 OFF* Not used
Key 8 OFF* Factory examination mode
Terminal CNH 1
SCSI Terminating Power
1-2 3-4 Function
SHORT* SHORT* Power is supplied from the drive to both the terminating resistor pack and
the TERMPWR pin on the SCSI bus. (Pin 26)
OPEN SHORT The TERMPWR pin is not used. Power is supplied from the drive to the drive's
active terminator.
SHORT OPEN Power is not supplied to the terminating resistor from the drive, only from
the TERMPWR pin.
OPEN OPEN Not used
SCSI Active Terminator Module on Drive PCA
5-6 SHORT* Enabled
OPEN Disabled
Note that there is no removable terminating resistor module on this drive. All termination functions are set through this terminal.
Terminal CNH 2
External operator panel connector
Pin Signal
1 CTGIN (Cartridge in)
2 -ID2 (bit value 4)
3 +LED (+5V)
4 -ID1 (bit value 2)
5 -LED
6 -ID0 (bit value 1)
7 EJSW (Eject switch)
8 COMMON 0
9 Device type mode
10 Spindle automatic stop mode
11 Macintosh mode
12 COMMON 1
13 Verify Mode
14 SCSI type 0
15 SCSI terminating resistor
16 0V (Ground)
The cable length to the operator panel should not exceed 30 centimetres
COMMON 0 and COMMON 1 are control signals and should not run to ground.
