S T 3 2 5 A SEAGATE NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 3.5"/SLIMLINE Cylinders | 615| | Capacity form/unform 21/ MB Heads 2| 4| | Seek time / track 31.5/10.0 ms Sector/track 17| 17| | Controller IDE / AT Precompensation Cache/Buffer KB Landing Zone Data transfer rate 1.500 MB/S int Bytes/Sector 512 MB/S ext Recording method RLL 2/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 5 55 | -40 60 Power: sleep 2.0 W Humidity % 8 80 | 5 90 standby 1.3 W Altitude km -0.305 3.048| -0.305 9.144 idle W Shock g 10 | 75 seek 6.5 W Rotation RPM 3048 read/write 5.5 W Acoustic dBA 35 spin-up W ECC Bit MTBF h 150000 Warranty Month Lift/Lock/Park YES Certificates CSA,FCC,IEC435,TUV,UL478,VDE ********************************************************************** L A Y O U T ********************************************************************** SEAGATE ST325/351-A/X DRIVE PRODUCT MANUAL 36145-005, REV. E With 3-pin power connector +---------------------------------------------------------+ | User 12-------2 |XX 3-pin | Configuration+--------+ |xx Power | Jumper block |XX | |XX AT/XT | |XX Inter- | |XX face | |XX | |.X | |XX | |XX | |XX | |XX | |X1 | | | |XX 4-pin | |XX Power +---------------------------------------------------------+ Without 3-pin power connector +---------------------------------------------------------+ | User 18--------2 | | Configuration+---------+ |XX | Jumper block |XX | |XX AT/XT | |XX Inter- | |XX face | |.X | |XX | |XX | |XX | |XX | |XX | |X1 | | | |XX 4-pin | |XX Power +---------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** SEAGATE ST325/351-A/X DRIVE PRODUCT MANUAL 36145-005, REV. E Jumper setting ============== There are two configurations of ST351A/X family drives. Both configurations can support either interface. - The first configuration has a 12-pin User Configuration jumper block and two DC power connectors: a 4-pin connector and a 3-pin connector. - The second configuration has an 18-pin User Configuration jumper block and a 4-pin power connector only. AT jumpers (with 3-pin power connector) ==================================================================== User Configuration jumper block (12-pin) ---------------------------------------- +12-10-8--6--4--2+ |O O O O O O| |O O O O O O| +11-9--7--5--3--1+ +----------------+ +----------------+ Drive is |O O O O O X| |O O O O X X| Slave drive master |O O O O O X| |O O O O X X| present +----------------+ +----------------+ +----------------+ +----------------+ Drive is |O O O O O O| |xxxx O O O O| Bus Reset HIGH slave |O O xxxx O O| |O O O O O O| +----------------+ +----------------+ +----------------+ Bus Reset |X O O O O O| LOW |X O O O O O| +----------------+ The bus reset active level is systemdependent. You must install a jumper in one of these positions for the drive to operate. +----------------+ +----------------+ Drive |O O O X O O| |O O O O O O| Factory test activity LED|O O O X O O| |O xxxx O O O| only (Do Not (Optional, +----------------+ +----------------+ Use) master only) Drive activity LED ------------------ To cause the drive to use the DASP signal to indicate bus activity through a remote LED, install a jumper on pins 5 and 6. This jumper can only be installed on the master drive. (On the slave drive, the DASP- signal indicates that a slave is present. Factory Test ------------ Not recommended for field use. When a jumper is installed on pins 7 and 9, the actuator continuously seeks between track 0 and the maximum data track and ignores any signals sent through the inter- face. Master/Slave ------------ You can install up to two drives on a single AT bus if you use a daisy-chain cable. Table below describes how to install the jumpers. +----------------+---------+---------+---------+ |System | Pins | | | |Configuration | 1 and 2 | 3 and 4 | 5 and 7 | +----------------+---------+---------+---------+ |Only drive in | CLOSED | OPEN | OPEN | +----------------+---------+---------+---------+ |Master in a two-| | | | |drive system | CLOSED | CLOSED | OPEN | +----------------+---------+---------+---------+ |Slave in a two- | | | | |drive system | OPEN | OPEN | CLOSED | |system | | | | +----------------+---------+---------+---------+ AT jumpers (without 3-pin power connector) ==================================================================== User Configuration jumper block (18-pin) ---------------------------------------- +18-16-14-12-10-8--6--4--2+ |O O O O O O O O O| |O O O O O O O O O| +17-15-13-11-9--7--5--3--1+ Drive is master Slave drive present +-------------------------+ +-------------------------+ |O O O O O O O X O| |O O O O O O X X O| |O O O O O O O X O| |O O O O O O X X O| +-------------------------+ +-------------------------+ Drive is slave Bus Reset HIGH +-------------------------+ +-------------------------+ |O O O O O X O O O| |O X O O O O O O O| |O O O O O X O O O| |O X O O O O O O O| +-------------------------+ +-------------------------+ Bus Reset LOW Drive activity LED (optional) +-------------------------+ +-------------------------+ |X O O O O O O O O| |O O X O O O O O O| |X O O O O O O O O| |O O X O O O O O O| +-------------------------+ +-------------------------+ The bus reset active level is system-dependent. You must install a jumper in one of these positions for the drive to operate. Factory test (Do Not Use) Factory reserved (Do Not Remove) +-------------------------+ +-------------------------+ |O O O O O O O O X| |O O O X O O O O O| |O O O O O O O O X| |O O O X O O O O O| +-------------------------+ +-------------------------+ Drive activity LED ------------------ To cause the drive to use the DASP signal to indicate bus sctivity through a remote LED, install a jumper on pins 13 and 14. This jumper can only be installed on the master drive. (On the slave drive, the DASP- signal is used to indicate that a slave is present. Factory Test ------------ Not recommended for field use. When a jumper is installed on pins 1 and 2, the actuator continuously seeks between track 0 and the maximum data track and ignores any signals sent through the inter- face. Factory reserved ---------------- Do not remove. At the factory, a jumper was installed on pins 11 and 12 of the User Configuration jumper block. The drive cannot function properly without it. Master/Slave ------------ You can install up to two drives on a single AT bus if you use a daisy-chain cable. Table below describes how to install the jumpers. +----------------+---------+---------+----------+ |System | Pins | | | |Configuration | 3 and 4 | 5 and 6 | 7 and 8 | +----------------+---------+---------+----------+ |Only drive in | CLOSED | OPEN | OPEN | +----------------+---------+---------+----------+ |Master in a two-| | | | |drive system | CLOSED | CLOSED | OPEN | +----------------+---------+---------+----------+ |Slave in a two- | | | | |drive system | OPEN | OPEN | CLOSED | |system | | | | +----------------+---------+---------+----------+ XT jumpers (with 3-pin power connector) ==================================================================== User Configuration jumper block (12-pin) ---------------------------------------- +12-10-8--6--4--2+ |O O O O O O| |O O O O O O| +11-9--7--5--3--1+ XT mode (Always ST325A/X only installed) Full capacity (20 MBytes) +----------------+ +----------------+ |O O X O O O| |O O O O O O| |O O X O O O| |O O O O O O| +----------------+ +----------------+ ST351A/X only ST351A/X only Full capacity (40 MB) 30-MB capacity +----------------+ +----------------+ |O O O O O X| |O O O O X O| |O O O O O X| |O O O O X O| +----------------+ +----------------+ ST351A/X only 20-MB capacity Bus Reset HIGH +----------------+ +----------------+ |O O O O X X| |xxxx O O O O| |O O O O X X| |O O O O O O| +----------------+ +----------------+ Bus Reset LOW +----------------+ |X O O O O O| |X O O O O O| +----------------+ The bus reset active level is system-dependent. You must install a jumper in one of these positions for the drive to operate. Drive activity LED (Optional, Factory test only master only) (Do Not Use) +----------------+ +----------------+ |O O O X O O| |O O O O O O| |O O O X O O| |O xxxx O O O| +----------------+ +----------------+ Drive capacity options ---------------------- To specify different capacities for the ST351A/X drive install the jumpers. You cannot change the capacity of the ST325A/X. Do not install jumpers on pins 1 and 2 or pins 3 and 4. Bus Reset (HIGH and LOW) ------------------------ The setting of this jumper depends on the system. A jumper must be installed in either the HIGH or LOW position for the drive function. Drive activity LED ------------------ When a jumper is installed on pins 5 and 6, the drive uses the DASP- signal to indicate bus activity through a remote LED. Factory Test ------------ Not recommended for field use. When a jumper is installed on pins 7 and 9, the actuator continuously seeks between track 0 and the maximum data track and ignores any signals sent through the inter- face. XT jumpers (without 3-pin power connector) ==================================================================== User Configuration jumper block (18-pin) ---------------------------------------- +18-16-14-12-10-8--6--4--2+ |O O O O O O O O O| |O O O O O O O O O| +17-15-13-11-9--7--5--3--1+ XT mode (Always ST325A/X only installed) Full capacity (20 MBytes) +-------------------------+ +-------------------------+ |O O O O X O O O O| |O O O O O O O X O| |O O O O X O O O O| |O O O O O O O X O| +-------------------------+ +-------------------------+ ST351A/X only ST351A/X only Full capacity (40 MB) 30-MB capacity +-------------------------+ +-------------------------+ |O O O O O O O X O| |O O O O O O X O O| |O O O O O O O X O| |O O O O O O X O O| +-------------------------+ +-------------------------+ ST351A/X only 20-MB capacity +-------------------------+ |O O O O O O X X O| |O O O O O O X X O| +-------------------------+ Bus Reset HIGH Bus Reset LOW +-------------------------+ +-------------------------+ |O X O O O O O O O| |X O O O O O O O O| |O X O O O O O O O| |X O O O O O O O O| +-------------------------+ +-------------------------+ The bus reset active level is system-dependent. A must jumper must be installed in one of these positions for the drive to operate. Drive activity LED Factory test (Optional, master only) (Do not use) +-------------------------+ +-------------------------+ |O O X O O O O O O| |O O O O O O O O X| |O O X O O O O O O| |O O O O O O O O X| +-------------------------+ +-------------------------+ Factory reserved (Do Not Remove) +-------------------------+ |O O O X O O O O O| |O O O X O O O O O| +-------------------------+ Bus Reset (HIGH and LOW) ------------------------ The setting of this jumper depends on the system. A jumper must be installed in either the HIGH or LOW position for the drive function. Drive activity LED ------------------ When a jumper is installed on pins 13 and 14, the drive uses the DASP- signal to indicate bus activity through a remote LED. Factory Test ------------ Not recommended for field use. When a jumper is installed on pins 1 and 2, the actuator continuously seeks between track 0 and the maximum data track and ignores any signals sent through the inter- face. Drive capacity options ---------------------- To specify different capacities for the ST351A/X drive install the jumpers. The ST325A/X drive does not offer the option of changing capacity. Install a jumper on pins 3 and 4 only. Leave pins 5 and 6 open. -------------------------------------------------------------------- 3-pin DC power -------------- ---+---------+--- | 3 2 1 | <--- key +-+--+--+-+ | | +------- + 5 VDC | +---------- +12 VDC +------------- Ground 4-pin DC power -------------- ----+------------+---- | 4 3 2 1 | +-+--+--+--+-+ | | | +------- +12 VDC | | +---------- +12 VDC return | +------------- + 5 VDC return +---------------- + 5 VDC ********************************************************************** I N S T A L L ********************************************************************** SEAGATE ST325/351-A/X DRIVE PRODUCT MANUAL 36145-005, REV. E Notes on installation ===================== Drive mounting -------------- horizontally vertically +-----------------+ +--+ +--+ +------------------+ | | | +-----+ +-----+ | | | x | | | | | | | | x+----------------+x +-+-----------------+-+ | | | | | | ||x x|| +---------------------+ | | | | | | || x x || | | | | | | || x x || x x | | | | | | || x x || +------x------x-------+ | +-----+ +-----+ | || xx || +-+------x--x-------+-+ +--+ +--+ || x x || | xx | || x x || | x x | || x x || +---x--------x----+ |x x| x x x++----------------++x PROHIBITED! PROHIBITED! You must mount the drive within 5* of a vertical or horizontal axis. Mounting the drive ------------------ For optimum performance, format the drive in the same orientation as you intend to mount it in the host system. Allow a minimum clearance of 0.050-inch around the entire drive envelope for cooling airflow and movement during shock or vibration. Shock mounts placed between the drive and the host frame should be designed so that the system has a vertical resonant frequency of 25 Hz or less. Bottom mounting --------------- Insert four mounting screws not more than 0.200 inches (6 full turns) into the drive frame. If you use a screw that is too long, you could damage the drive. Standard side mounting ---------------------- Insert four mounting screws not more than 0.125 inches (4 full turns) into the drive frame. If you use a screw that is too long, you could damage the drive. Three-hole side mounting ------------------------ If your system does not allow you to use all four mounting points, you can mount the drive satisfactorily using only three screws. Use 6-32 UNC-2A screws on drives with standard-size mounting holes. These drives have an "S" stamped on the frame runner. Use M4 screws on drives with metric mounting holes. These drives have an "M" stamped on the frame runner. Caution: Be careful not to over-tighten the screws - you could damage the drive. (Max torque: 6 inch-Ibs). Acoustics --------- At a distance of 1 meter, the drive creates a sound pressure of 35 dBA at idle. Auto-park --------- Upon power-down, the read/write heads automatically move to the shipping zone. The heads park inside the maximum data cylinder. When power is applied, the heads recalibrate to track 0. AT/XT interface connector ------------------------- The interface cable connector is a 40-pin connector with two rows of 20 pins on 100 mil centers. The maximum cable length is 18 inches (0.457 meters). Strain relief is recommended. Recommended cables are shown below. AMP P/N 1-499496-0 DuPont P/N 66900-040 A dual-drive AT system requires an AT interface daisy-chani cable. A dual-drive XT system requires two separate XT interface cables. The ST351A/X family drives do not use terminating resistors. ********************************************************************** F E A T U R E S ********************************************************************** SEAGATE ST325/351-A/X DRIVE PRODUCT MANUAL 36145-005, REV. E AT and XT power-on diagnostics ------------------------------ If an error condition is detected during the power-on diagnostics, the LED flashes to indicate the cause of the failure. LED flash codes +--------------------------------------------------------------+ |Number of | |LED flashes Description of problem | +--------------------------------------------------------------+ | 1 Microprocessor memory failure | +--------------------------------------------------------------+ | 2 Program ROM memory checksum error | +--------------------------------------------------------------+ | 5 Program RAM access error | +--------------------------------------------------------------+ | 6 Buffer memory access error | +--------------------------------------------------------------+ | 7 Drive not ready | +--------------------------------------------------------------+ | 8 Error uploading RAM | +--------------------------------------------------------------+ | 9 Program RAM not compatible with ROM | +--------------------------------------------------------------+ | 10 Read/Write sequencer chip diagnostics error | +--------------------------------------------------------------+ | 11 Program RAM checksum error | +--------------------------------------------------------------+ | 12 Error uploading defect data | +--------------------------------------------------------------+ | 13 Defect data checksum error | +--------------------------------------------------------------+ | 17 Spindle failure | +--------------------------------------------------------------+ | 18 or 19 Invalid defect tables | +--------------------------------------------------------------+ Default logical configuration ----------------------------- ST325A/X ST351A/X Cylinders 615 980 R/W Heads 4 5 Sec./track 17 17 Recommended logical configuration --------------------------------- A wide variety of configurations are available. The configurations shown below are recommendations. They provide the maximum possible formatted capacity. ST325A/X ST351A/X Cylinders 615 820 R/W Heads 4 6 Sec./track 17 17 Maximum logical parameters -------------------------- All cylinder, head, and sector geometries are limited to: - The maximum specified below, and - The constraints of the following two relations: (heads) x (sectors per track) 255 (cylinders) x (heads) x (sectors per track) guaranteed sectors Cylinders 1,024 Logical heads 16 Sectors per track 128 Reliability ----------- MTBF power on-hours 150,000 MTTR (minutes) 30 Service life (years) 5 The specification for MTBF, above, assumes nominal power at sea level and an ambient temperature of 25*C. Seek Time --------- | Read | Write | ----------------------------------+--------+--------+ Track-to-Track msec. typ. | 7 | 13 | msec. max. | 12 | 16 | Average msec. typ. | 28 | 35 | Average msec. max. | 36 | 40 | Full-stroke msec. typ. | 65 | 75 | msec. max. | 80 | 85 | Latency msec. avg. | 9.84 | 9.84 | ----------------------------------+--------+--------+ Average seek time is atrue statistical average seek time, less over- head. It is measured by executing at least 5,000 logical read/write commands between random sector addresses. Track-to-track seek time is an average of all possible single-track seeks in both directories. Full stroke seek time is one-half the time needed to seek from the first data block to the maximum data block and back to the first block. All typical measurements assume a block size of 512 bytes, nominal power at sea level, and an ambient temperature of 25*C. Maximum seek times are measured over the full range of environmental conditions and voltage conditions. Environment ----------- The ST351A/X family drives are listed in accordance with UL 478 and CSA (0-M1982) and meet all applicable sections of VDE 0806/08.81 and IEC 380, as tested by TUV-Rheinland, North America. Input noise ----------- The input noise was measured at the host system power supply across an equivalent 20-ohm resistance on the +12 VDC line and an equivalent 8-ohm resistance on the +5 VDC line. Permitted input noise ripple (max) 100mV (peak-to-peak) Permitted input noise frequency (max) 20 MHz