MICROPOLIS CORPORATION

MICROPOLIS 4221, 4221AV

DRIVE SELECTION
Drive Number	ID0	ID1	ID2
0	open	open	open
1	closed	open	open
2	open	closed	open
3	closed	closed	open
4	open	open	closed
5	closed	open	closed
6	open	closed	closed
7	closed	closed	closed
Note: only one set of ID jumpers should be used at any time.

USER CONFIGURABLE SETTINGS
Function	Location	Setting
Front LED disabled	LED2	open
Front LED enabled	LED2	closed
Spindle sync termination disabled	MS & SS	closed
Spindle sync termination enabled	MS & SS	open
SCSI parity check enabled	PTY	open
SCSI parity check disabled	PTY	closed
Drive is sole drive or at end of chain	RN1 & RN2	installed
Drive is not sole drive or at end of chain	RN1 & RN2	not installed
Write protect disabled	WP	open
Write protect enabled	WP	closed

SPINDLE MOTOR CONFIGURATION
Function	SP0	SP1
Spindle motor starts on power-up	open	open
Spindle motor starts on command only	closed	open
Spindle motor delay by 12sec. xSCSI ID	open	closed

TERMINATION POWER SETTINGS
Setting	W1	W2	W3
TERMPWR supplied by drive	closed	open	N/A
TERMPWR supplied by SCSI interface pin 26	open	closed	N/A
TRMPWR supplied by drive to bus pin 26	N/A	N/A	closed

MICROPOLIS 4525A (VER. 1), 4540A (VER. 1), 4550A (VER. 1)

DRIVE CONFIGURATION
Setting	JP1/C	JP1/D	JP1/E
Single drive only	open	closed	open
Drive is master in two drive system	closed	closed	open
Drive is slave in two drive system	open	open	open
Master/Slave determined by Cable Select	open	open	closed