7 2 7 3 A MAXTOR NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 3.5"/SLIMLINE Cylinders 2769| 1012| | Capacity form/unform 273/ MB Heads 2| 16| | Seek time / track 12.0/ 1.5 ms Sector/track | 32| | Controller IDE / ATA2 FAST/ENHA Precompensation Cache/Buffer 256 KB SEGMENTED Landing Zone Data transfer rate 4.600 MB/S int Bytes/Sector 512 11.100 MB/S ext Recording method RLL 1/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 5 55 | -40 71 Power: sleep 0.6 W Humidity % 5 95 | 5 95 standby 0.7 W Altitude km -0.061 3.048| idle 3.9 W Shock g 10 | 70 seek 4.2 W Rotation RPM 4500 read/write 4.4 W Acoustic dBA 32 spin-up 14.8 W ECC Bit REED SOLOMON,WITH 11BIT BU... MTBF h 300000 Warranty Month 12 Lift/Lock/Park YES Certificates CSA,FCC,TUV,UL1950,VDE ********************************************************************** L A Y O U T ********************************************************************** MAXTOR 7273A OEM PRODUCT MANUAL PART #1253 REV. P3 1993 +---------------------------------------------------------+ | +-+-+-+-+ | | +++++++++ | | J25-+ |J23+--J22 XX | J24---+ +-+ XX | +-+J20XX | +-+J19XX | +-+J18XX J1 | +-+J17X* | +-+J16XX | XX | XX | XX | XX1-2 | | 1 | XX Power | XX J2 +---------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** MAXTOR 7273A OEM PRODUCT MANUAL PART #1253 REV. P3 1993 Jumper setting ============== Note: Jumpers J25, J22 and J17 factory reserved. Do not use! J16 I/O Channel Ready ---------------------- J16 CLOSED Option Enabled J16 OPEN Option Disabled (default) J18 Automatic Idle Mode ------------------------ J18 CLOSED Enabled J18 OPEN Disabled (default) J19 Deferred Spin up --------------------- J19 OPEN Spin drive on power up (default) J19 CLOSED Defer spin until first read/write J20 Master/Slave ----------------- J20 CLOSED Only drive in single drive system (Default) J20 CLOSED Master in dual drive system J20 OPEN Slave in dual drive system J23 Write Cache ---------------- J23 OPEN Enabled (default) J23 CLOSED Disabled J24 Cable Select ----------------- J24 OPEN Disabled (default) J24 CLOSED Enabled ********************************************************************** I N S T A L L ********************************************************************** MAXTOR 7273A OEM PRODUCT MANUAL PART #1253 REV. P3 1993 Notes of Installation ===================== Installation direction ---------------------- horizontally vertically +-----------------+ +--+ +--+ | | | +-----+ +-----+ | | | | | | | | | +-+-----------------+-+ | | | | | | +---------------------+ | | | | | | | | | | | | | | | | | | +---------------------+ | +-----+ +-----+ | +-+-----------------+-+ +--+ +--+ | | | | +-----------------+ The drive will operate in all axis (6 directions). Recommended Mounting Configuration ---------------------------------- Maxtor 7000 Series drive design allows greater shock tolerance than that afforded by larger, heavier drives. The drive may be mounted in any attitude using four size 6-32 screws with 1/8" maximum penetration. Allow adequate ventilation to the drive to ensure reliable drive operation. Air Filtration System --------------------- All 7000 Series drives are designed to operate in a typical office environment with minimal 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 four head selection (depending on the model), read preamplification, and write drive circuitry. Read/Write Heads and Disks -------------------------- Four low mass, low force read/write heads record data on two 3.5" diameter disks. Maxtor uses a sputtered thin film medium on all disks for 7000 Series drives. Drive Mechanism --------------- A brushless DC direct-drive motor rotates the spindle at 4,500 RPM ( 0.1%). The dynamically balanced motor/spindle assembly ensures minimal mechanical runout to the disks. 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 ------------------- All 7000 Series drives employ a rotary voice coil actuator which consists of a moving coil, an E-block or 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. Automatic Headpark and Lock Operation ------------------------------------- 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 released only when power is again applied. Dual Drive Support ------------------ Two drives may be accessed via a common interface cable, using the same range of I/O addresses. The drives are jumpered as drive 0 or 1, and are selected by the drive select bit in the Drive/Head register of the task file. All Task File registers are written in parallel to both drives. The interface processor on each drive decides whether a command written to it should be executed; this depends on the type of command and which drive is selected. Only the drive selectedexecutes the command and activates the data bus in response to host I/O reads; the drive not selected remains inactive. A master/slave relationship exists between the two drives: drive 0 is the master, and drive 1, the slave. When J20 is closed (factory default), the drive assumes the role of master; when open, the drive acts as a slave. In single drive configurations, J20 must be closed. Cable Select ------------ CSEL (cable select) is an optional feature per ATA CAM specification. Drives configured in a multiple drive system are identified by CSEL's value: - If CSEL is grounded, then the drive address is 0. - If CSEL is open, then the drive address us 1. NOTE If the Cable Select jumper (J24) is installed, the Master/Slave jumper (J20) will be ignored. Sector Address Translation -------------------------- All 7000 Series drives feature a Universal Translate Mode. In an AT-class system, the drive may be configured to any specified combination of cylinders, heads, and sectors (within the range of the drive's formatted capacity). The 7273A powers-up in the Translate Mode: Cylinders Heads Sectors 1012 16 33 Interface Connector ------------------- All 7000 Series AT drives have a 40-pin interface connector mounted on the PCBA. The drive may connect directly to the host; or it can also accommodate a cable connection (maximum cable length: 18 inches). (Striped Edge = Pin 1) Buffer Segmentation ------------------- The data buffer is organized into three segments: the read buffer, the write buffer, and an micro controller scratch pad. The read segment occupies half of the buffer and operates as a circular read- ahead buffer. The write segment occupies the other half. During write operations, it contains the host write data. Commands ATA Read Buffer (E4) and ATA Write Buffer (E8) are implemented per CAM specification 4a. Read-Ahead Mode --------------- Normally, this mode is active. Following a read request, disk read- ahead begins on the first sector and continues sequentially until the buffer is full. If a read request is received during the read-ahead operation, the buffer is examined to determine if the request is in the cache. If a cache hit occurs, read-ahead mode continues without interruption and the host transfer begins immediately. ********************************************************************** F E A T U R E S ********************************************************************** MAXTOR 7273A OEM PRODUCT MANUAL PART #1253 REV. P3 1993 Introduction ------------ Maxtor 7000 Series AT disk drives are 1" high, 3.5" random access storage devices which incorporate an on-board AT controller. Maxtor engineers have applied recent advances in hard drive technology to the design and manufacture of these drives. High data transfer rates and fast access times make the 7273A especially well-suited to high- end desktop and entry level workstation applications. Defect Management Zone (DMZ) ---------------------------- The 7273A has six (6) spare sectors per DMZ, located at the end of each DMZ. Upon detection of a bad sector that has been reassigned, the next sequential sector is used. The first spare sector makes up for the loss of sector 3, and so maintains the sequential order of data, with 5 spare sectors still allocated for that DMZ. This push down method assures maximum performance. In the rare occurrence that the number of reassigned bad sectors exceed the number of spare sectors allocated for that DMZ, an alternate track at the inner diameter of the disk is used. The 7273A has four (4) alternate tracks. Error Correction Code --------------------- The 7273A uses a Reed-Solomon code for error detection and correction. The error correction polynomial can correct one error burst with a maximum of 11 bits. Individual bursts ( 11 bits) are corrected without any resulting performance degradation. Zone Density Recording ---------------------- The disk capacity is increased with bit density management - common with Zone Density Recording. Each disk surface is divided into 8 circumferential zones. All tracks within a given zone contain a constant number of data sectors. The number of data sectors per track varies in different zones; the outermost zone contains the largest number of data sectors, and the innermost contains the fewest. Seek Time --------- +----------------------------------+--------+ |Track-to-Track msec. typ. | 1.5 | +----------------------------------+--------+ |Average msec. typ. | 12 | | msec. max. | 28 | +----------------------------------+--------+ |Controller overhead msec. | 0.4 | +----------------------------------+--------+ |Latency msec. avg. | 6.66 | +----------------------------------+--------+ Execute Drive Diagnostics ------------------------- Commands the drive to implements the internal diagnostics tests. (These tests are executed only upon command receipt; they do not run automatically at power up or after a reset.) The drive sets BSY immediately upon receiving this command. This table presents the codes and their descriptions: Note that the value in the Error register should be viewed as a unique 8 bit Code. +-----------+----------------------------------+ |Error Code | Description | +-----------+----------------------------------+ | 01 | no error detected | +-----------+----------------------------------+ | 02 | formatter device error | +-----------+----------------------------------+ | 03 | sector buffer error | +-----------+----------------------------------+ | 04 | ECC circuitry error | +-----------+----------------------------------+ | 05 | controller microprocessor error | +-----------+----------------------------------+ | 8x | slave drive failed (Note) | +-----------+----------------------------------+ Note: If a slave drive fails diagnostics, the master drive OR's 80 hex with its own status, and loads that code into the Error register. If a slave drive passes diagnostics (or a slave is absent), the master drive OR's 00 with its own status and loads that code into the Error register. EISA Type "B" and Type "F" DMA Modes ------------------------------------ Direct Memory Access (DMA) transfers improves system performance by significantly improving troughtput. Physical Configuration Sectors per track ---------------------------------------- Zone 1 = 114 Zone 2 = 112 Zone 3 = 108 Zone 4 = 102 Zone 5 = 96 Zone 6 = 88 Zone 7 = 80 Zone 8 = 72 Data transfer rate (MBytes per second) -------------------------------------- to/from media Zone 1 = 5.57 Zone 5 = 4.52 Zone 2 = 5.45 Zone 6 = 4.27 Zone 3 = 5.25 Zone 7 = 3.84 Zone 4 = 5.00 Zone 8 = 3.47 To/from buffer 17.5 To/from interface 11.1 1:1 Interleave Operation ------------------------ Since all 7000 Series drives operate with a 1:1 interleave, "optimizing" interleave for a host system is unnecessary. Regardless of the host system's speed, the drive's 256K buffer allows all disk transfers to occur at a one-to-one rate. Since these drives always format with interleave 1, they override any interleave specified in the FORMAT command. Logical Block Addressing ------------------------ The logical Block Address (LBA) mode can only be utilized in systems that support this form of translation. The cylinder, head and sector geometry of the drive, as presented to the host, differs from the actual physical geometry. The host AT computer may access a drive of set parameters: number of cylinders, heads, and sectors per track, plus cylinder, head and sector addresses. However, the drive can't use these host parameters directly because of zoned recording techniques. The drive translates the host parameters to a set of logical internal addresses for data access. The host drive geometry parameters are mapped into an LBA based on this formula: LBA = (HSCA - 1) + HHDA x HSPT + HNHD x HSPT x HCYA (1) = (HSCA - 1) + HSPT x (HHDA + HNHD x HCYA) (2) where HSCA = Host Sector Address, HHDA = Host Head Address HCYA = Host Cylinder Address, HNHD = Host Number of Heads HSPT = Host Sectors per Track The LBA is checked for violating the drive capacity. If it does not, the LBA is converted to physical drive cylinder, head and sector values. The physical address is then used to access the data stored on the disk and other drive related operations.