G O D R I V E G L S 8 5 A T QUANTUM Native| Translation ------+-----+-----+----- Form 2.5"/SUPERSLIMLINE Cylinders 1395| 722| | Capacity form/unform 85/ MB Heads 2| 10| | Seek time / track 17.0/ 5.0 ms Sector/track | 23| | Controller IDE / AT Precompensation Cache/Buffer 96 KB Landing Zone Data transfer rate 2.938 MB/S int Bytes/Sector 512 4.000 MB/S ext Recording method RLL 1/7 operating | non-operating -------------+-------------- Supply voltage 5 V Temperature *C 5 55 | -40 65 Power: sleep 0.2 W Humidity % 10 90 | 10 90 standby 0.9 W Altitude km -0.061 3.048| -0.061 12.192 idle 1.6 W Shock g 10 | 100 seek 2.2 W Rotation RPM 3600 read/write 2.2 W Acoustic dBA 33 spin-up W ECC Bit 112,REED SOLOMON MTBF h 350000 Warranty Month 12 Lift/Lock/Park YES Certificates CSA,FCC,IEC950,TUV,UL1950,VDE ********************************************************************** L A Y O U T ********************************************************************** QUANTUM GODRIVE GLS 85/127/170/256 AT PRODUCT MANUAL 81-103562-04 +---------------------------------------------------------+ | |XX | |XX | |XX | |XX | |XX | |XX | |XX | |*X | |XX | |XX | |XX | |XX | |XX | |XX | SP CS DS | 1 | +-+-+ +-+-+-+ |XX +----+++++----------------+++++++-------------------------+ ********************************************************************** J U M P E R S ********************************************************************** QUANTUM GODRIVE GLS 85/127/170/256 AT PRODUCT MANUAL 81-103562-04 Jumper Setting ============== The jumper pins are located on the underside of the printed circuit board (PCB). GoDrive GLS 85/127/170/256 AT hard disk drives can be configured as a master or a slave drive, using either the jumper blocks on the drive's controller board or by grounding certain lines on the inter- face connector. |XX |XX SP CS DS | 1 | +-+-+ + +-+-+-+ + |XX +----+++++-+--------------+++++++-+-----------------------+ | | +-------+---+ +--------+-------+ | +-++-+ | |+-++-++-+ | | ++++++Pins| |+++++++++ Pins | | SP | | CS DS | | +*--*+ | |+*--*+ | | +----+ | |+----+Jumper | | Jumper | | OR +*--*+ | +-----------+ | +----+Jumper| +----------------+ There are two sets of jumper pins. The SP is labeld "SP" for slave present. The other set (three jumper pins) has two labels "CS" and "DS" for Cable Select and Drive Select. The center pin is common to both the CS and the DS positions. When a jumper block is on the center pin and the pin nearest the interface connector, DS is enabled. When a jumper block is on the center pin and the pin furthest from the interface connector, CS is enabled. NOTE Jumper blocks can be placed in a storage position by locating them on one jumper pin as shown in the following Figure. +-++-+ +-++-++-+ ++++++Pins +++++++++ Pins SP CS DS +*--*+ +*--*+ +----+Jumper +----+Jumper Master Drive Configuration -------------------------- GoDrive GLS 85/127/170/256 AT hard disk drives are configured at the factory as a master drive as defined by the CAM (Common Access Method). This configuration is shown in the following figure. +-++-+ +-++-++-+ ++++++Pins +++++++++ Pins SP CS DS +*--*+ +*--*+ +----+Jumper +----+Jumper Master Drive with Slave Present ------------------------------- When GoDrive GLS 85/127/170/256 AT hard disk drives are configured as a master drive, the drive looks for a slave drive by monitoring the PDIAG/DASP lines. Some hard disk drives when configured as a slave do not indicate their presense on these two lines (GoDrive does). To indicate that a slave is present for these drive (when using GoDrive as a master), the slave present (SP) pins on GoDrive master must be jumpered as shown. +-++-+ +-++-++-+ ++++++Pins +++++++++ Pins SP CS DS +*--*+ +*--*+ +----+Jumper +----+Jumper Slave Drive Configuration ------------------------- GoDrive GLS drives can be configured as a slave drive as shown. +-++-+ +-++-++-+ ++++++Pins +++++++++ Pins SP CS DS +*--*+ +*--*+ +----+Jumper +----+Jumper Cable Selection --------------- The drive can be configured such that its status as a master or slave drive can be determined by the cabling from the host system. +-++-+ +-++-++-+ ++++++Pins +++++++++ Pins SP CS DS +*--*+ +*--*+ +----+Jumper +----+Jumper NOTE This is extremely helpful when GoDrive GLS 85/127/170/256 AT is used as a removable subsystem where it can be either master drive or a slave drive depending upon the cable to which is connected. When a GoDrive GLS drive is configured for cable selection, as shown in the Figure below, it is master drive if Pin 28 is grounded and a slave if Pin 28 is not grounded. For systems that do not use Pin 28 for another purpose (e.g., Spindle Synchronization), the host system can tie Pin 28 to ground. Then the cable connecting the host to the master has Pin 28 enabled (i.e., a circuit exists), while the cable connecting the slave to either the host or the master has the Pin 28 line servered. Systems that use Pin 28 can use the cable selection method by performing the following: 1. Connect the system cable in the following order host <--> slave <--> master. 2. Cut the Pin 28 line between the slave and the master. This allow Pin 28 to operate normally (an open - served connection) between the host and the slave. 3. Tie Pin 28 (within the master drive header) to a nearby ground (Pin 30, for example). This process will allow the master drive to have Pin 28 grounded while allowing the Pin 28 to be open between the host and slave drive. ********************************************************************** I N S T A L L ********************************************************************** QUANTUM GODRIVE GLS 85/127/170/256 AT PRODUCT MANUAL 81-103562-04 Notes on Installation ===================== Installation direction ---------------------- horizontally vertically +-----------------+ +--+ +--+ | | | +-----+ +-----+ | | | | | | | | | +-+-----------------+-+ | | | | | | +---------------------+ | | | | | | | | | | | | | | | | | | +---------------------+ | +-----+ +-----+ | +-+-----------------+-+ +--+ +--+ | | | | +-----------------+ The drive will operate in all axis (6 directions). Dimensions and Mounting ----------------------- GLS drives are designed to meet the Manufacturers Compatibility Committee (MCC) dimensional requirements. The drive can be mounted in any orientation. Maximum screw penetra- tion is 3mm with a minimum penetration of three full threads. The maximum mounting torque for these screws is 40 inch-ounces. NOTE For optimum drive performance, the system mounting method should not result in any disortion or twisting of the drive's base casting. For example, if the drive is attached (via its bottom mounting holes) to a stiff mounting surface that does not meet the GoDrive GLS flatness requirements of 0.01", then head switch times may be degraded. The threaded holes in each of the four corners of the GoDrive GLS are for top cover attachment only and should never be used for any other purpose. Ventilation ----------- GoDrive GLS 85/127/170/256 AT hard disk drives can operate without a cooling fan, provided the ambient air temperature des not exceed 55*C (131*F). Any user-designed cabinet must provide adequate air circulation to prevent the maximum temperature from being exceeded. Cable Connector --------------- GoDrive GLS 85/127/170/256 AT hard disk drives have a single 2 x 22 connector (on 2mm centers) for both power and data. The connector also includes four pins which are reserved for factory test points - these pins must be allowed to float. The recommended system mating connector is a 3M Series 150 or equivalent. The maximum cable length is 18 inches. To assure that the system cable connector is installed with the proper orientation, plug Pin 20 hole on the system connector. ********************************************************************** F E A T U R E S ********************************************************************** QUANTUM GODRIVE GLS 85/127/170/256 AT PRODUCT MANUAL 81-103562-04 General Description ------------------- Quantum's GoDrive GLS 85/127/170/256 hard disk drives provide the high capacity, performance and reliability required by today's advanced 386- and 486-based notebook computers. The GoDrive GLS products offer outstanding performance, with fast time-to-data and outstanding sustained data transfer rates. These drives also offer low power consumption (0.2 watts standby). Fast spin-up times from the standby mode help conserve power and improve system response time. The GoDrive GLS hard disk drives provide extensive error correction capability, with features such as ECC on-the-fly which minimizes the impact of recoverable errors on throughput. The GoDrive GLS products feature highly reliable one,- two- and three-disk designs supported by a projected field MTBF of more than 350,000 hours. A one-year warranty is standard on GoDrive GLS drives purchased directly from Quantum or a authorized distributor or dealer. Features -------- - Embedded IDE-AT controller - Fast time to data: < 17 ms average seek time and 8.3 ms latency - Fast spin-up from standby: less than 2.5 seconds - Lightweight (GLS 85 4.2 ounces, GLS 256 6.1 ounces) - 96KB cache buffer - DisCache look.ahead read caching firmware for faster data retrieval - WriteCache sophisticated caching technique to streamline write commands - AccuWrite system battery backup permits accumulation of write request in the buffer - Multiple-zone recording for fast sustained data transfer rates - Low parts count for increased reliability - 112-bit Reed Solomon Error Correction Code (ECC), with 48-bit double burst correction - Defect Free Interface firmware for automatic reassignment of new defective sectors without reformatting - Automatic actuator shipping lock and dedicated landing zone - Ability to daisy-chain two drives on the interface - Excellent power management to preserve battery life - >350,000 hour projected field MTBF - Cable Select automatic master/slave configuration capability - Automatic diagnostic testing power-up - High shock resistance, 250g non-operating (2ms) - One-year warranty - Low profile, optimized for number of disk Seek Time --------- +-------------------------------+--------+ | | GLS AT | +-------------------------------+--------+ |Track-to-Track msec. typ. | 5 | +-------------------------------+--------+ |Average msec. typ. | 17 | +-------------------------------+--------+ |Full-Stroke msec. | 24 | +-------------------------------+--------+ |Latency msec. avg. | 8.3 | +-------------------------------+--------+ AccuWrite --------- In a battery powered system, a drive is often placed into STANDBY mode after a period of inactivity. While this conserves power, this also makes the system relatively slow to respond to a write request since a couple seconds are required to exit the STANDBY mode by spinning up the disk. Fortunately, the battey power source which motivates power conservation also provides an option for fast response time. Unlike AC power, power from a battery is predictable. Indeed, almost all battery powered systems are constantly monitoring their power source so as to inform the user to save any work in progress to disk when the battery is getting critically low. Since the battery is already being used as a virtual UPS (uninterruptable power supply), the same predictable power can be used to assure the integrity of data stored in the drive's cache buffer. Thus, when AccuWrite is enabled and the drive is in STANDBY mode, any write request is storef in buffer memory and the write command acknowledged. The drive, however, takes no immediate action to store the buffer data to disk. Data in the buffer will be written to disk the next time the disk needs to be spin up. Spin up can be needed to satisfy a read request that cannot be satisfied from the buffer or if the write segment of the buffer becomes full. While AcuWrite provides for very fast response time, as well as lower power consumption by avoiding disk spin ups and improved reliablity by incurring fewer spin downs, the option requires the host to provide a controlled power down. That is, when the user turns off the machine, rather than simply cutting power to the drive, the host must issue a SLEEP command so that the drive knows enough to save the buffer data to disk and acknowledge the command that notifies the host that power to the drive can be safely cut. Byte 39, Bit 7 of the configuration block partially controls the AccuWrite option. The option is disabled at the factory with a sett- ing of zero but can be enabled with a setting one. Setting the Accu Write bit in the configuration block is necessary BUT NOT SUFFICIENT to enable AccuWrite option. Because many battery powered systems are also capable of running on AC only (without the presense of any battery backup), enabling AccuWrite not only requires that is configuration bit be set but also that Set Features command be used to Enable Write Cache (002H). Thus, to properly support the AccuWrite option, the host must be aware of its power source and issue the Set Features/Enable Write Cache command only when the source is a battery. Number of Defects ----------------- The factory limit for the number of defects per surface is 42 or one per megabyte of surface capacity. Any spare capacity not consumed at the factory is available for reallocation of field grown defects. The logical block address of a sector found defective in the field is reassigned thus maintaining the Defect Free Interface. It is reassigned to a spare sector physically closet to the defective sector. The physical address of the defective sector is added to the defect list. The defect list provides for a maximum of 292 entries.