2 5 2 5 2 S MAXTOR NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 2.5"/SUPERSLIMLINE Cylinders 1418| | | Capacity form/unform 251/ MB Heads 6| | | Seek time / track 12.0/ 2.5 ms Sector/track | | | Controller SCSI1 SINGLE-ENDED Precompensation Cache/Buffer 128 KB FIFO BUFFER Landing Zone Data transfer rate 2.500 MB/S int Bytes/Sector 512 5.000 MB/S ext SYNC Recording method RLL 1/7 operating | non-operating -------------+-------------- Supply voltage 5 V Temperature *C 5 55 | -40 Power: sleep 0.1 W Humidity % 80 | standby 0.1 W Altitude km -0.061 3.048| idle 1.6 W Shock g 15 | 150 seek 1.9 W Rotation RPM 4247 read/write 2.0 W Acoustic dBA 30 spin-up 2.8 W ECC Bit 96 MTBF h 350000 Warranty Month 12 Lift/Lock/Park YES Certificates CSA,FCC,IEC380,TUV,UL1950,VDE ********************************************************************** L A Y O U T ********************************************************************** MAXTOR 25252S PRODUCT MANUAL PART 1228 REV. P5 +--------------------------------------------------------+ | | | |XX | |XX | |XX I/O | SW301 |XX | OFF +-+ ON |XX J4 | | |1 |XX | | |2 |XX | | |3 |XX | +-+4 |XX | OFF +-+ ON |XX | | |1 |XX | | |2 |XX | | |3 |XX1 | +-+4 |xxVendor | SW302 |xxSpecific | |xx J2 +--------------------------------------------------------+ +---------------------------------------------------------+ | | | | | +------------J4--------------------------A7-----A1+ | | |o o o o o o o o o o o o o o o o o o 1 o o o o | | | |o o o o o o o o o o o o o o o o o o o o o o o o | | | +40---------------------------------------A8-----A2++ | | | Vendor Specific +--+ Options +--+ ********************************************************************** J U M P E R S ********************************************************************** MAXTOR 25252S PRODUCT MANUAL PART 1228 REV. P5 Jumper Setting ============== Drive Switch Options -------------------- Switches on the drive's printed circuit board (PCB) have these functions: +-----+-------+---------------+-----+-------+-----------------------+ |SW301|Default|Function |SW302|Default|Function | +-----+-------+---------------+-----+-------+-----------------------+ |SW1 |ON |Power-Up Option|SW1 |OFF |RESERVED | +-----+-------+---------------+-----+-------+-----------------------+ |SW2 |OFF |Parity Disable |SW2 |ON |Target ID Address (MSB)| +-----+-------+---------------+-----+-------+-----------------------+ |SW3 |OFF |RESERVED |SW3 |ON |Target ID Address | +-----+-------+---------------+-----+-------+-----------------------+ |SW4 |OFF |RESERVED |SW4 |OFF |Target ID Address (LSB)| +-----+-------+---------------+-----+-------+-----------------------+ Drive is shipped with an ID of 6. Choose address settings according to specific installation requirements. ID Setting ---------- The SCSI bus supports connection of up to seven devices, but communication can occur only between two SCSI devices at a time. Each device has an assigned ID bit that establishes device priority on the SCSI bus. When two SCSI devices communicate, one acts as an initiator and the other as a target. The initiator originates an operation and the target performs the operation specified by the initiator. An initiator can address up to seven other logical units (LUNs) attched to one target. The drive has only one logical unit attached (LUN=0). The drive can be addressed through switches: SW302 SW2 SW3 SW4 OFF OFF OFF ID 0 Lowest OFF OFF ON ID 1 . OFF ON OFF ID 2 . OFF ON ON ID 3 . ON OFF OFF ID 4 . ON OFF ON ID 5 . ON ON OFF ID 6 Highest Alternately, the drive can be addressed through pins A5, A6, and A7. (Grounding a pin's signal enables its corresponding address bit.) When this method is used, SW2, SW3, and SW4 on switch block 302 must be set to OFF. Pin A5 Sel 0 (LSB) Pin A6 Sel 1 Pin A7 Sel 2 (MSB) Each 25000 Series SCSI drive is shipped from the factory with an ID of 6. This ID designation assures sufficient switches are available for any address except 7 (which is usually reserved for the host system). Terminator Power Selection -------------------------- This drive does not supply terminator power. SW301 Parity Disable Option ---------------------------- This option is enabled by the default setting (OFF) of SW2 on switch block 301. To disable this option, set SW2 to ON. SW301 Power-Up Option ---------------------- SW1 OFF Wait for Start Command The disk drive will not spin-up until the initiator issues a START/STOP UNIT command with the start bit equal to one. ON Start When Power is Applied The spin motor starts when power is applied. ********************************************************************** I N S T A L L ********************************************************************** MAXTOR 25252S PRODUCT MANUAL PART 1228 REV. P5 Notes On Installation ===================== Installation direction ---------------------- horizontally vertically +-----------------+ +--+ +--+ | | | +-----+ +-----+ | | | | | | | | | +-+-----------------+-+ | | | | | | +---------------------+ | | | | | | | | | | | | | | | | | | +---------------------+ | +-----+ +-----+ | +-+-----------------+-+ +--+ +--+ | | | | +-----------------+ The drive will operate in all axis (6 directions). Recommended Mounting Configuration ---------------------------------- Maxtor 25000 Series drive design allows greater shock tolerance than that afforded by larger, heavier drives. The drive may be mounted in any attitude. Mount the drive with size 3 mm screws with 0.381 (0.15 inch) maximum penetration. Allow adequate ventilation to the drive to ensure reliable operation over the operating temperature range. Physical Interface ------------------ SCSI Pin-out Definitions The drive communicates with an initiator system via a 40-pin connector, J4. Note that minus sign (-) indicates low-true logic. +----+----------+----+----------+ |Pin |Signal |Pin |Signal | The SCSI bus uses eighteen +----+----------+----+----------+ signals: |A1 |RSVD |A2 |RSVD | |A3 |RSVD |A4 |RSVD | a) nine signals for the 8-bit |A5 |DS0 |A6 |DS1 | data bus and one data parity |A7 |DS2 |A8 |NC | bit, and |Key |NC |Key |NC | |01 |+5V Logic |02 |+5V Logic | b) nine signals as the SCSI |03 |+5V Return|04 |+5V Return| control lines. The lines |05 |GND |06 |-DB0 | coordinate bus accesses for |07 |GND |08 |-DB1 | transferring commands, data, |09 |GND |10 |-DB2 | status, and messages. |11 |GND |12 |-DB3 | |13 |GND |14 |-DB4 | Across the SCSI bs, initiator |15 |GND |16 |-DB5 | signals are low-true. The signals |17 |Key NC |18 |-DB6 | are asserted (active) at 0 to 0.8 |19 |GND |20 |-DB7 | VDC; and negated (inactive) at |21 |GND |22 |-DBP | 2.5 to 5.25 VDC. This low-true |23 |GND |24 |NC | logic is indicated by the |25 |-ATN |26 |-BSY | negative sign (-) preceding the |27 |GND |28 |-ACK | signal name. |29 |-RST |30 |-MSG | |31 |GND |32 |-SEL | |33 |-I/O |34 |-C/D | |35 |GND |36 |-REQ | |37 |+5V RET |38 |+5V RET | |39 |+5V MOTOR |40 |+5V MOTOR | +----+----------+----+----------+ Interface Termination --------------------- The drive does not supply on-board termination. The user is responsible for termination at both ends of the bus. The last physical device on the SCSI bus must be terminated. Any drive or other SCSI device connected between the host and the device at the end of the terminator must not be terminated. The 25252S does not supply on-board termination. Active Negation --------------- In configurations where the SCSI cable measures less than two feet and power consumption is critical (as in battery operation), the host may be terminated with pull-ups to enable the target active negation feature. Sector Size ----------- The disk drive is fixed at (and factory-formatted with) 512-byte sectors. 128K Data Buffer and Look-Ahead Cache ------------------------------------- The target device anticipates sequential reads by reading to fill the buffer, making data immediately available to new READ commands. By termporarily placing small amounts of data in high-speed memory, cache with look-ahead read decreases access time to sequential data in the drive. Read-ahead performs all the required seeks and head switching needed to fill the buffer with sequential data. The 25252S has a 128K data buffer. Buffering Scheme ---------------- The drive has a 128K circular First-In-First-Out (FIFO) buffer. The buffer controller allows simultaneous transfer either: 1. to the drive from the initiator, or 2. from the drive to the initiator. How Look-ahead Cache Functions ------------------------------ In the absence of an error, corrected data, or an interrupt command, the drive caches not only requested sectors, but "looks ahead" and caches data from the sector that follow.(Look-ahead cache reads across track boundaris.) The "look-ahead" feature prepares the drive to transfer cached data when the host request it and so prevents access time delays. Caching of sectors continues until: 1. an error occurs, 2. a host command inconsistent with sequential reads is received. Commands are interrupt driven, so if the drive is performing a look-ahead cache when a non-sequential command is received, it will stop cache and process the command. Consequently, look-ahead cache operations do not add overhead to command processing. Resets and Write or Write Long commands to any of the cached sectors invalidate the whole cache. Air Filtration System --------------------- All 25000 Series drives are designed to operate in a typical office environment with minimum environmental control. Over the life of the drive, a 0.3 micron filter and breather filter (located within the HDA) maintain a clean environment to the heads and disks. Read/Write Electronics ---------------------- An integrated circuit mounted within the sealed enclosure (near the read/write heads) provides one of six head selection (depending on the model), read preamplification, and write drive circuitry. Read/Write Heads and Disks -------------------------- Low-mass, low-force thin film read/write heads record data on the 2.5" diameter disk(s). Maxtor uses a sputterred thin-film media, with glass/canasite substrate on all disks for 25000 Series drives. Automatic Headpark and Lock --------------------------- Immediately following power-down, dynamic braking of the spinning disks delays momentarily and lets the heads move to an inner mechanical stop. A small fixed magnet holds the heads in place as the disk spin down. The heads are release only upon reapplication of power. Acoustic Noise -------------- Averages are recorded during Idle mode. Sound power (per ISO/DIS 7779) 3.4 belA Sound Pressure (1 meter perpendicular to top cover) 30 dBA Sound Pressure (seated operator position, per ISO 7779) 32.5 dBA Drive Mechanism --------------- A brushless DC direct-drive motor rotates the spindle at 4,247 RPM ( 0.1%). The dynamically balanced motor/spindle assembly ensures minimal mechanical runout of the disk(s). A dynamic brake provides a fast stop to the spindle motor upon power removal. The speed tolerance includes motor performance and motor circuit tolerances. Voice Coil Actuator ------------------- 25000 Series drives employ a rotary voice coil actuator which consists of a moving coil, actuator arm assembly, and stationary magnets. The actuator moves on a low-mass, low-friction center shaft. The low friction generated contributes to fast average access time and low power consumption. Driver/Receiver Requirements ---------------------------- Any device driving the disk inputs should be of the open collector type, capable of sinking at least 48 mA at a voltage level less than 0.5V DC (7438 or equivalent). Devices receiving 25000 Series disk drive outputs should be SCHMITT trigger type (74LS14, 74LS240, or equivalent) to improve noise immunity. The initiator should not load the bus with more than one standard low-power Schotky transistor-transistor logic (LSTTL) input load per line. Interface Connector ------------------- All 25000 Series drives have a 40-position header connector (J4) comprised of two rows of twenty male pins on 2 mm centers. Option connector J2 is an 8-position header comprised of two rows of four male pins on 2 mm centers. The drive may connect directly to the host. It can also accomodate a cable connection. Electrical Description ---------------------- All signal levels are TTL compatible. A logic 1 is > 2.0 volts. A logic 0 ranges from 0.00 volts to 0.70 volts. Interface Cable --------------- Use a 1 mm flat ribbon cable with a 2 x 25 2 mm IDC connector (for example, Dupont PN 69764-050 or Molex PN 87259-5016). Do not power more than one drive from a single 1 mm cable. Alternately, a standard 0.1 inch SCSI flat ribbon cable equipped with an appropriate 2.5" disk drive adapter may be used. The striped edge of this cable represents pin 1 and must be oriented towards pin 1 at the drive connector and at the host connector. Electrical Interface -------------------- SCSI uses single-ended drivers and receivers which allows a maximum cable length of 22 feet (6 meters) from the first to the last device (up to 7 devices) on the bus. The drive interfaces to the SCSI host via a 40-pin keyed ribbon cable. All signals driven by the drive are open collector and have the output characteristics shown in the following table. +-------------------------+-------------------+ |Signal True | 0.0 VDC to 0.8 VDC| +-------------------------+-------------------+ |Maximum Total Input Load | -0.4 mA @ 0.4 VDC | +-------------------------+-------------------+ |Signal False | 2.5 to 5.25 VDC | +-------------------------+-------------------+ |Maximum Input Hysteresis | 0.2 VDC | +-------------------------+-------------------+ ********************************************************************** F E A T U R E S ********************************************************************** MAXTOR 25252S PRODUCT MANUAL PART 1228 REV. P5 Introduction ------------ The Maxtor 25000 Series are 2.5" random access storage devices using on-board SCSI (Small Computer System Interface) controller. Maxtor engineers have applied recent advances in hard drive technology to the design and manufacture of these drives. Reduced size, increased durability, and low power consumption make them especially well suited to notebook, laptop, and desktop applications. Seek Time --------- +----------------------------------+--------+ | | 25252S | +----------------------------------+--------+ |Track-to-Track msec. typ. | 2.5 | +----------------------------------+--------+ |Average msec. typ. | 12 | |Full Stroke msec. | 22 | +----------------------------------+--------+ |Latency msec. avg. | 7.064| +----------------------------------+--------+ Data transfer rate ------------------ to/from media Zone 1 = 3.125MB Zone 5 = 2.361MB Zone 2 = 3.021MB Zone 6 = 2.222MB Zone 3 = 2.778MB Zone 7 = 2.083MB Zone 4 = 2.708MB Zone 8 = 2.014MB Defect Management ----------------- REASSIGN commands push data down within a defect management zone (DMZ) to maintain sequential order and assure maximum performance. The 25252S has 6 spare sectors per DMZ; they are located at the end of each cylinder. Upon detection of an error in a sector, execution of a REASSIGN command flags that sector as bad; the next sequential sector is than used. Power-Up Sequence ----------------- Once power is applied, the actuator lock automatically disengages. The drive then spins up, performs a recalibration sequence to track zero, and becomes ready in 5 seconds. The drive executes its recali- bration sequence whenever power is applied or the SCSI START/STOP command is invoked via the SCSI bus. Error Conditions ---------------- Under any one of several error conditions, the drive changes to BUS FREE without correctly terminating the command: no DISCONNECT or COMMAND COMPLETE message is sent. The drive clears all information regarding the command (except any sense data) and does not attempt to reconnect, or in any other way terminate the command. The initiator must assume this is a catastrophic failure and return the error to the system software. When this condition occurs, sense data may or may not be valid. Sense data is valid when a REQUEST SENSE command sent by the initiator is returned with a sense key/error code other than 00h/00h. Set the drive type in the AT BIOS setup to "not installed". NOTE: this intelligent drive will identify itself to the system and SCSI host adapter. 1:1 Interleave -------------- All 25000 Series SCSI drives operate with a 1:1 interleave, so "optimizing" interleave for a host system in unnecessary. Regardless of host system speed, the drive's full-track buffer allows all disk transfers to occur at a 1:1 rate. Since 25000 Series drives always format with interleave 1, they override any interleave specified in the operating system's FORMAT command. Sectors per track ----------------- Zone 1 = 67 Zone 5 = 54 Zone 2 = 64 Zone 6 = 48 Zone 3 = 60 Zone 7 = 45 Zone 4 = 57 Zone 8 = 43 Self-Test Sequence ------------------ The self-test sequence is executed upon drive power-up to verify basic hardware component integrity. This series of tests is not a complete hardware diagnostic. During the first 250 milliseconds of self-test, the drive does not respond to a SELECTION phase on the SCSI bus. During this time, the drive completes remaining self-test sequences, initializes the SCSI circuit, and enables SCSI interrupts. If UNIT ATTENTION is enabled (default is disabled), in Mode Page 0 the drive would respond to selection with CHECK CONDITION status and the appropriate sense data (such as: UNIT ATTENTION, POWER ON/RESET condition). The following table describes the events comprising self-test. +-------------------------------------------------------------------+ |NAME | |Hardware Reset Test | |COMPONENTS TESTED | |Microprocessor, buffer controller, disk formatter, and SCSI reset | |latch | |COMMENTS | |Tests for proper power-up condition. When a hardware reset test | |fails, the drive can be reset only by a power-up condition. | +-------------------------------------------------------------------+ |NAME | |Microprocessor Test | |COMPONENTS TESTED | |Microprocessor internal memory, timers, and register bank switching| |COMMENTS | |Test for proper operation. | +-------------------------------------------------------------------+ |NAME | |Buffer Controller Test | |COMPONENTS TESTED | |Buffer controller | |COMMENTS | |All registers are tested and the buffer controller circuit is | |engaged to access RAM. | +-------------------------------------------------------------------+ |NAME | |Disk Formatter Test | |COMPONENTS TESTED | |Disk formatter circuit | |COMMENDS | |Writes and reads all possible patterns to each register. Interrupts| |are then tested to ensure that the circuit generates an interrupt | |when a command completes. | +-------------------------------------------------------------------+ |NAME | |SCSI Controller Test | |COMPONENTS TESTED | |SCSI controller circuit | |COMMENTS | |Executes the circuit diagnostic command. Interrupts are then tested| |to ensure that the SCSI circuit generates an interrupt when a | |command completes. Lastly, the registers are tested by writing and | |reading all possible patterns to each of the SCSI controller | |circuit registers. | +-------------------------------------------------------------------+ ********************************************************************** G E N E R A L ********************************************************************** MAXTOR SCSI INSTALLATION GENERIC INSTALLATION PROCEDURE FOR A SCSI DRIVE ----------------------------------------------------------- 1. Install a 50 pin ribbon connector making sure pin 1, which can be identified by the striped edge of the cable, is closest to the power connector on the drive. 2. Install a DC power cable to the back of the drive. 3. Verify the SCSI ID selection. Note: SCSI ID usually needs to be set to 0 to be the boot drive. The last physical device on the SCSI bus must be terminated. Any other drive or SCSI device connected between the host and the device at the end of the bus must not be terminated. 4. Apply power to the computer. 4a. When memory test is complete go into your system's Standard C-MOS set-up. (Note: There are various ways to get into C-MOS set-up, please refer to system's manual for instuctions.) 4b. Set the drive type to "Not Installed". This intelligent drive will identify itself to the SCSI host adapter. 5. Boot from a DOS diskette that has FDISK.EXE and FORMAT.COM on it. At the A> prompt type in FDISK. At the menu options select option 1 to create a DOS partition. Another menu will appear and from those options choose 1 to create a Primary DOS partition. Select yes to make 1 large partition and it will automatically become active. Then escape from FDISK. 6. At the A> prompt type in FORMAT C:/S This does a high-level format on the drive and transfers the system files in order for the drive to be bootable. (Note: Maxtor SCSI drives are low-level formatted at the factory) 7. The drive is now bootable. As a test remove the DOS diskette from A and press reset to re-boot the computer, a C> should be displayed, the drive is now ready for operation.