D K 3 1 2 C - 2 5 HITACHI NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 3.5"/HH Cylinders 1076| | | Capacity form/unform 240/ MB Heads 12| | | Seek time / track 16.8/ ms Sector/track 38| | | Controller SCSI1 SINGLE-ENDED Precompensation Cache/Buffer 32 KB LOOK-AHEAD Landing Zone Data transfer rate 1.500 MB/S int Bytes/Sector 512 4.000 MB/S ext SYNC Recording method RLL 2/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 5 45 | -20 60 Power: sleep W Humidity % 8 80 | 8 90 standby W Altitude km | idle W Shock g 3 | 40 seek W Rotation RPM 3600 read/write W Acoustic dBA spin-up W ECC Bit MTBF h 150000 Warranty Month Lift/Lock/Park YES Certificates ********************************************************************** L A Y O U T ********************************************************************** HITACHI DK312C-20/25 PRODUCT MANUAL K2500324 +------------------------------------------------------------+ | +-J5----1 4---6 +--+ | 12-------+ 3---1 JP126 JP121 1-+XXX 22-+ 3-+XXX || | +-+-+ XXX || |J3 TM117| | XXX || | | | XXX || | | | XXX |+-1 +---+ XXX ++ XXX J1 ++LED XXX | XXX | XXX | 2 1 | +--+ | JP114 1--2| | +----------------1 +------1 |J6|| | 26----------------+ 10-----+ JP109 11--12 +------------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** HITACHI DK312C-20/25 PRODUCT MANUAL K2500324 Jumper Setting ============== Jumper Plug Installation ------------------------ The following jumpers are accessible to the user: JP114 9 14 or J6 1 6 SCSI ID setting jumper JP114 15 16 SCSI bus parity jumper JP121 1 4 Terminator power on/off J6 9 10 WRITE PROTECTED setting jumper JP114 3 4 MOTOR START/STOP setting jumper JP114 1 2 Look ahead cache function setting jumper JP126 1 6 Look ahead cache function segment setting jumper J6 7 8 SCSI ID POLARITY INVERTED setting jumper The DK312C jumpers other than listed above are installed by the manufacturer and must not be replaced by the user. JP114 SCSI ID setting jumper ---------------------------- 26----25 + +----+ + 23 26 Drive type setting jumper +----+ + +----+ 18xxxx17 17-18 Jumper plug always installed (Factory use) +----+ 15-16 SCSI bus parity setting jumper 14xxxx13 + 13-14 SCSI ID 4 +xxxx+ + 9 14 SCSI ID set 11-12 SCSI ID 2 10xxxx9 + 9-10 SCSI ID 1 +----+ +----+ +xxxx+ 3-4 MOTOR Start/Stop Option set 2xxxx1 1-2 Look ahead cash function set. +----+ SCSI ID JP114, J6 ----------------- Pins 9-10 |11-12 |13-14 |SCSI ID# ------+------+------+--------- This table shows SCSI ID Setting CLOSED|CLOSED|CLOSED|SCSI ID 0 Jumpers without setting SCSI ID OPEN |CLOSED|CLOSED|SCSI ID 1 Polarity inverted by the jumper plug CLOSED|OPEN |CLOSED|SCSI ID 2 between J6 No. 7 and No. 8. OPEN |OPEN |CLOSED|SCSI ID 3 CLOSED|CLOSED|OPEN |SCSI ID 4 OPEN |CLOSED|OPEN |SCSI ID 5 CLOSED|OPEN |OPEN |SCSI ID 6 OPEN |OPEN |OPEN |SCSI ID 7 SCSI ID can be set either JP114 or J6. Please avoid setting SCSI ID by both JP114 and J6. No jumper plug must be installed in either JP114 (No. 9-14) or J6 (No. 1-6). J6 | 1----+2 + 1-2 SCSI ID 1 +----+ + 1 6 SCSI ID 3-4 SCSI ID 2 +----+ + 5-6 SCSI ID 4 7----+ 7- 8 SCSI ID POLARITY INVEVTED set +----+ 9-10 Write Protected set 11----+12 11-12 External LED terminal +----+ (11 o---+<----o 12) +--+ +--+J2 JP114 23-26 Drive type setting jumper ------------------------------------- 26+----+25 26+----+25 The drive type setting jumpers are +----+ +xxxx+ numbered as shown according to each 24+----+23 24+----+23 model. These jumpers are set by the DK312C-25 DK312C-20 manufacturer at shipment and changing the setting positions are not allowed. JP114 15-16 SCSI bus parity jumper ---------------------------------- 15-16 CLOSED Disables SCSI bus parity OPEN Enables SCSI bus parity JP121 Terminator Power on/off ------------------------------ Pins 3-4 CLOSED +5V source for terminator is supplied only from the SCSI bus. Pins 1-2 x CLOSED +5V source for terminator is supplied only from the drive controller. The jumper plug between NO.3 and 4 will not be inserted (no terminator provided) at shipment. NOTE Terminator power source is supplied to the terminator register module from the host that pulls up the SCSI interface signald in the controller so that the SCSI bus lines will not be pulled down when DK312C power is turned on. J6 9-10 Write Protection jumper ------------------------------- 9-10 CLOSED Write protected. The disk can be only read and cannot be written. 9-10 OPEN Read or write. The disk is enabled for both read and write. (Shipment) JP114 3-4 Motor Start/Stop jumper --------------------------------- 3-4 CLOSED The motor start/stop option is not selected. The spindle motor is started when DK312C power is turned on. (Shipment) OPEN The motor start/stop option is selected. The spindle motor can be started or stopped by using SCSI command. When the motor start/stop option is selected, the drive enters the motor stop state when its power is turned on. Use the Start/Stop Unit (1BH) command to start or stop the drive. NOTE When motor start/stop option is not used, the controller does not respond to the host about 35 sec from Power turn-on to Drive Ready. JP114 1-2 Look Ahead Cache Jumper --------------------------------- 1-2 CLOSED The Look Ahead Cache function is not selected. The DK312C uses a 32 KB buffer size. NOTE: Sets 1 for the number of the segments when not- selecting the Look Ahead Cache function. OPEN Selects the Look Ahead Cache function. The DK312C operates with the buffer size (number of the segments) specified on JP126. JP114 is set at the factory not to select the Look Ahead Cache function. Setting the Look Ahead Cache function operates immediately after turning on the power. Use the MODE SELECT (15) command to execute or stop this function. JP126 1 6 Look Ahead Cache function ----------------------------------- +---+ 3|o o|4 Sets 1 for the number of the Look Ahead Cache function 2|x x|5 segments. The unit uses a 32KB buffer size. 1|X X|6 +---+ +---+ 3|o X|4 Sets 2 for the number of the Look Ahead Cache function 2|x x|5 segments. The unit uses a 16KB buffer size. 1|X o|6 +---+ +---+ 3|x x|4 Sets 4 for the number of the Look Ahead Cache function 2|X X|5 segments. The unit uses a 8KB buffer size. 1|o o|6 +---+ The terminator of the DK312C other than the last drive of SCSI Daisy Chain MUST be removed. Number of the Look Ahead Cache function segments is set to 1 at the factory. NOTE The jumper setting for Look Ahead Cache function has priority to the Mode Select (15) command. When changing the jumper setting, re-issue the Mode Select (15) command to match the command to the number of the segments. J6 7-8 SCSI ID Polarity Inverted setting jumper ----------------------------------------------- 7-8 OPEN Pins (JP114, J6) ID 1 | ID 2 | ID 4 |SCSI ID# ------+------+------+--------- CLOSED|CLOSED|CLOSED|SCSI ID 0 ------+------+------+--------- OPEN |CLOSED|CLOSED|SCSI ID 1 ------+------+------+--------- CLOSED|OPEN |CLOSED|SCSI ID 2 ------+------+------+--------- OPEN |OPEN |CLOSED|SCSI ID 3 ------+------+------+--------- CLOSED|CLOSED|OPEN |SCSI ID 4 ------+------+------+--------- OPEN |CLOSED|OPEN |SCSI ID 5 ------+------+------+--------- CLOSED|OPEN |OPEN |SCSI ID 6 ------+------+------+--------- OPEN |OPEN |OPEN |SCSI ID 7 7-8 CLOSED Pins (JP114, J6) ID 1 | ID 2 | ID 4 |SCSI ID# ------+------+------+--------- CLOSED|CLOSED|CLOSED|SCSI ID 7 ------+------+------+--------- OPEN |CLOSED|CLOSED|SCSI ID 6 ------+------+------+--------- CLOSED|OPEN |CLOSED|SCSI ID 5 ------+------+------+--------- OPEN |OPEN |CLOSED|SCSI ID 4 ------+------+------+--------- CLOSED|CLOSED|OPEN |SCSI ID 3 ------+------+------+--------- OPEN |CLOSED|OPEN |SCSI ID 2 ------+------+------+--------- CLOSED|OPEN |OPEN |SCSI ID 1 ------+------+------+--------- OPEN |OPEN |OPEN |SCSI ID 0 SCSI ID can be set either JP114 or J6. Please avoid setting SCSI ID by both JP114 and J6. No jumper plug must be installed in either JP114 (No. 9-14) or J6 (No. 1-6).