H P C 2 4 8 8 A - 0 0 1 HEWLETT PACKARD NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 3.5"/HH Cylinders 2465| | | Capacity form/unform 1600/ MB Heads 15| | | Seek time / track 9.2/ 2.5 ms Sector/track | | | Controller SCSI2 SI/FAST Precompensation Cache/Buffer 256 KB SEGMENTED Landing Zone Data transfer rate 5.000 MB/S int Bytes/Sector 512 10.000 MB/S ext SYNC Recording method RLL 1/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 5 50 | -40 65 Power: sleep W Humidity % 8 80 | 5 90 standby W Altitude km -0.305 3.048| -0.305 15.240 idle W Shock g 10 | 50 seek 18.9 W Rotation RPM 6400 read/write 18.0 W Acoustic dBA 39 spin-up 38.0 W ECC Bit 144,REED SOLOMON MTBF h 500000 Warranty Month 60 Lift/Lock/Park YES Certificates CSA,IEC950,TUV,UL1950,VDE ********************************************************************** L A Y O U T ********************************************************************** HEWLETT HP C2486A/88A/90A TECHNICAL REFERENCE MANUAL 5961-4359 +---------------------------------------------------------+ | 1-+ |XX | Option | | |XX | Pin-Set | | |XX | | | |XX I | | | |XX N | 16-+ |XX T | |XX E | |XX R | |XX F | |XX A | |XX C | |XX E | |X1 | | ++LED |XX ++ |XX Power +---------------------------------------------------------+ 1 ********************************************************************** J U M P E R S ********************************************************************** HEWLETT HP C2486A/88A/90A TECHNICAL REFERENCE MANUAL 5961-4359 Jumper Setting ============== Option Pinset ------------- Auto Spinup-------------+ +----------------------Key Parity----------+ | | +-------------------SCSI Pin 29 SDTR-------+ | | | | +----------------Sync Spindle Unit Attention----+ | | | | | | +-------------Key Write Protect-+ | | | | | | | | | | | | | | | | | 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | | | | | | | | | | | | | | | | | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | | | | | | | | | +-RESERVED | | | +--Unit Select 1 | +-----Terminator Enable | | +-----Unit Select 2 +--------Terminator Power | +--------Unit Select 3 +-----------RESERVED Unit Select ----------- Rear pins: GND; Front Pins: Unit Select 1-2-3 +----------+-----------------------+ | SCSI ID | Jumpers | | | 3 | 2 | 1 | +----------+-------+-------+-------+ | 0 | OPEN | OPEN | OPEN | | 1 | OPEN | OPEN | CLOSED| | 2 | OPEN | CLOSED| OPEN | | 3 | OPEN | CLOSED| CLOSED| | 4 | CLOSED| OPEN | OPEN | | 5 | CLOSED| OPEN | CLOSED| | 6 | CLOSED| CLOSED| OPEN | | 7 | CLOSED| CLOSED| CLOSED| +----------+-------+-------+-------+ 6 and 7 Sync Spindle -------------------- 6 Rear Pin: Sync Spindle; Front Pin: SCSI pin 29 7 Rear Pin: SCSI pin 29; Front Pin: GND Note Pinsets 6 and 7 have no effect if Sync Spindle Mode is disabled. Refer to Mode Page 04H. 6 OPEN NOT ALLOWED 7 OPEN 6 CLOSED Connects Sync Spindle line to SCSI pin 29. When pinset 6 is 7 OPEN shorted, pinset 7 MUST be open. Rear pin of pinset 7 is sync output in Master mode, or sync input in Slave mode. 6 OPEN Connects pin 29 to ground. When pinset 6 is shorted, pinset 7 CLOSED 7 MUST be open. 6 CLOSED NOT ALLOWED 7 CLOSED 9 Auto Spin-up --------------- Rear Pin: Auto Spin-Up; Front Pin: GND 9 OPEN Drive will not spin up until Initiator sends Start Unit command 9 CLOSED Drive will spin up automatically at Power-On 10 Parity --------- Rear Pin: Parity; Front Pin: GND 10 OPEN Inhibit parity checking 10 CLOSED Enable parity checking 11 SDTR -------- Rear Pin: SDTR; Front Pin: GND 11 OPEN Inhibit drive Initiation of SDTR message 11 CLOSED Enable drive Initiation of SDTR message at Power-On and Reset. 12 Unit Attention ----------------- Rear pin: Unit Attention; Front Pin: GND 12 OPEN Enable Unit Attention 12 CLOSED Inhibit Unit Attention 13 Write Protect ----------------- Front Pin: GND; Rear Pin: Write Protect OPEN Drive looks at Mode Page Header and responds accordingly; default = NOT write protected CLOSED Drive is forced into the Write Protect mode 14 Reserved ------------ MUST BE OPEN! 15 Terminator Enable -------------------- Front Pin: GND; Rear Pin: Terminator Enable 15 OPEN On-board active terminators disabled. Terminators not connected to SCSI connector 15 CLOSED On-board active terminators enabled and connected to SCSI bus. TermPwr source determined by placement of Terminator Power pinset jumper. 16 Terminator Power ------------------- Front Pin: SCSI pin 26; Rear Pin: TermPwr 16 OPEN TermPwr for on-board terminators provided by the drive only. Drive TermPwr is not connected to SCSI connector pin 26. 16 CLOSED TermPwr for on-board terminators provided by the drive, and drive TermPwr is connected to SCSI connector pin 26. Terminator Power Source Options ------------------------------- The single-ended drive is shipped with active terminator integrated circuit installed. When installing multiple drives on the SCSI channel, the terminators must be disabled on all but the last drive in the chain. When the Terminator Enable jumper is installed, the terminators are disconnected from the SCSI connector. Active terminators should be powered by Terminator voltage (TermPwr) whenever the drive is connected to an active SCSI bus to avoid exceeding the bus high-state input current specification. The terminator Power jumper determines the TermPwr source as listed be- low. Note Terminator Enable jumper must be installed to connect the active terminators to the SCSI connector. ********************************************************************** I N S T A L L ********************************************************************** HEWLETT HP C2486A/88A/90A TECHNICAL REFERENCE MANUAL 5961-4359 Notes on Installation ===================== Screws ------ Use 6/32 UNC screws with flat washers under the heads and torque them to 15 inch-pounds. When mounted, the hardware must not protrude more than 3 mm (0.12in.) beyond the inside of the disk drive mounting frame. Maintain a minimum clearance of 0.04 in. (1.0mm) between any system structure and any PCA component. Maintain a minimum clearance of 0.06 in. (1.5 mm) between any system structure and the top and all four sides of the disk drive. Insure that the system struture contacts only the drive mounting frames and clears the drive HDA. Operating Temperature Guidelines -------------------------------- Ambient air temperature and airflow must be properly balanced to maintain drive performance and reliability. Operating Temperature Considerations The operating ambient air temperature specification is 5*C to 50*C (41*F to 122*F). Adjust the ambient air temperature to prevent the temperature at each location from exceeding the stated limit. Airflow Considerations The recommended air flow to maintain the component temperatures is 3 to 5 CFM (cubic feet per minute) with most of the air flowing across the printed circuit board. Synchronized Spindle -------------------- The C2080A/88A/90A disk drives supports the Stand Alone, Slave, Master modes, but not the Master Control mode. The power-on default for all drives is the Stand Alone Mode. When the drive is in the Stand Alone mode: It does not transmit a sync signal It does not receive an externally sourced slave sync input When the drive is set to the Slave mode: It does not transmit a sync signal It will sync to an externally slave sync signal When the drive is set to the Master mode: It transmit a sync signal on the sync pin It syncs internally to the same signal SCSI Connector -------------- The SCSI device connector is a nonshielded 50-pin connector. Cabling Requirements -------------------- The disk drive adheres to the cabling requirements and limitations set forth in the ANSI SCSI specifications. - Cables with a characteristic impedance of 100 ohms 10% are re- commended unshielded flat or twisted pair ribbon cable. - Cables with a characteristic impedance of 90 ohms 10% are pre- ferred for shielded cables. - To minimize discontinuities and signal reflections, do not use cables with different impedances on the same bus. - A minimum cable size of 28 AWG should be used to minimize noise effects and ensure proper distribution of termination power. - Cables must be properly terminated Single-Ended Cable ------------------ A 50-conductor flat cable or 25-signal twisted-pair cable should be used. Cable length should be equal to or less than 6.0 meters. This refers to internal and external cable length (except stubs). A stub length of no more than 0.1 meter is allowed off the main line interconnection within any connected device. Mating Connector Requirements ----------------------------- +--------------------------------------+----------------------------+ |Connector/Function |Recommended Mating Connector| +--------------------------------------+----------------------------+ | Equivalents may be used | +--------------------------------------+----------------------------+ |SCSI Connector (narrow: single-ended, |3M 3425-6600 | |differential) | | +--------------------------------------+----------------------------+ |DC power |AMP 1-480424-0 | +--------------------------------------+----------------------------+ |Sync. Spindle Connector |AMP Housing 4-87456-9 *1 | +--------------------------------------+----------------------------+ |Shorting jumpers for Option pin-sets | | |(2.0 mm spacing) | | | 2x1 shorting jumper: |Dupont 86730-001 | | |(HP p/n 0360-2526) | +--------------------------------------+----------------------------+ Note *1 Contacts insert required; refer to vendor documentation to select the proper contact set for the installed wire size. (For AWG 20-24 wire, use AMP 1-87309-4) Power Distribution ------------------ The +5 and +12 voltages provided by an external dc power supply are distributed to the spindle motor driver, actuator driver, analog amplifiers, and disgital circuitry. A reset output alerts the other circuits when power-on occurs and when power is lost. Each circuit responds in a predefined manner to the reset condition. Airflow Requirements -------------------- Airflow is required to maintain disk drive performance and reliability. For best results, the drive should be operated as cool as possible. The mayority of the air should flow accross the PCA. This is a function of the specific airflow pattern inside the cabinet where the disk drive is installed. The airflow pattern around the drive should be adjusted to prevent the temperature measuring points on the HDA and the PCA from exceed- ing the maximum limits. ********************************************************************** F E A T U R E S ********************************************************************** HEWLETT HP C2486A/88A/90A TECHNICAL REFERENCE MANUAL 5961-4359 Product Description ------------------- The HP C2486A/88A/90A SCSI single-ended disk drives are reliable, low cost, high capacity, high performance, random access mass storage devices. Each product utilizes sputtered thin-film 3.5-inch (95 mm) disks as storage media. Specials -------- For customer needs that differ from the products described in this manual, Hewlett-Packard can provide specially modified products. These modifications are ordered, defines, engineered, and manufactured under "special" contract negotiations. Seek Times (including settling) ------------------------------- +-----------------------------+--------+ |Track-to-Track msec. | 2.5 | +-----------------------------+--------+ |Average Reads msec. | 8.75 | +-----------------------------+--------+ |Average Writes msec. | 9.5 | +-----------------------------+--------+ |Maximum Seek msec. | 18.0 | +-----------------------------+--------+ |Rotational Latency msec. | 4.69 | +-----------------------------+--------+ Front Panel LED Indicator ------------------------- The light emitting diode (LED) on the front of the disk drive is an activity light that indicates the operational status of the drive from power-on, through the self-test diagnostics, and into normal operation. 1. On At Power-On, the LED turns on until the Power-On sequence is complete and then turns off. If the Auto-SpinUp option jumper is installed, the Power-On sequence includes execution of the SpinUp sequence, calibrating the head positioning electronics, and testing the read/write system. If the Auto-SpinUp option is not installed, the Power-On sequence includes execution of the SpinUp sequence only. 2. Flashing A flashing LED (approximately 1 Hz) indicates that the controller has failed all or a portion of the internal diagnostic tests. 3. Intermittent After the power-on diagnostic have completed, the LED functions as an activity light and will go any time the disk drive is executing a command, reading, or writing. If the LED is off, the drive is idle. Sector Format ------------- The smallest directly addressable storage area on a data surface is a sector. Accessing a sector is accomplished when the controller specifies the address of the cylinder, head, and sector. Error Correction Code --------------------- The disk drives use a Reed-Solomon error correction code (ECC) for detection and correction of data errors. During a write operation, the ECC function generates 18 bytes of ECC information into the ECC field as the sector is written. During a read operation, the controller generates an 18-byte code from the data field being read, and compares it to the ECC field created during the write operation. If the 18-byte code differs from the ECC field, a data error is detected and the ECC field is used to correct the data. RAM Buffer ---------- The RAM Buffer contains 256-kilobytes of static RAM. All data trans- ferred between the host and the disk must pass through the RAM buffer. Disk Controller --------------- The disk controller coordinates the flow of data between the SCSI interface and the disk controller. It contains a DMA section which controls the transfer of data between the SCSI interface, the buffer RAM, and the disk controller. The DMA accesses the 256-kilobyte static RAM buffer to match the transfer speeds of the SCSI interface and the disk controller. The disk controller also performs error checking on data being transferred form the disk to the RAM buffer and generates ECC on data transferred from the RAM buffer to the disk. The data controller also does header verification during read/write operations. Spindle Motor Driver -------------------- The spindle motor driver provides 3-phase current to start, drive, and control the speed of the in-hub spindle motor. Spindle motor current is controlled by switching circuitry that uses PWM (Pulse Width Modulation) technique to reduce +12-Volt power consumption during spin-up, and during subsequent operation.