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- SEAGATE TECHNOLOGY, INC.
- Customer Technical Support FAX Network +1 408 438-8137
- Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
- ┌──────────────────────────────────┬─────────────────────────────────┐
- │ United States +1 408 438-8771 │ United Kingdom +44 628 478011 │
- ├──────────────────────────────────┼─────────────────────────────────┤
- │ Germany +49 89 140-9331 │ Singapore +65 227-2217 │
- └──────────────────────────────────┴─────────────────────────────────┘
- (C)opyright 1991
-
-
-
- ST-351A/X AT/XT Interface
-
- │J2 12-pin version (located
- │ on side, near rear)
- └─────┬────────────────
- │
- 1 3 5 7 9 11
- (front) ▀ ° ° ° ° ° (back)
- ° ° ° ° ° °
- ═════╧═2══4══6══8══10═12═╧═══
- │ 4-pin DC
- │
- │ 3-pin DC AT/XT Interface Power
- │ Power connector ┌─1─2─3─4─┐
- │ ╒═1═2═3═╕ ╒════════════════════╕ │ 0 0 0 0 │
- ────┴──────────────────┐ │ 0 0 0 │ │:::::::::::::::::::1│ \12─G─G─5─/
- J2 Jumper Configurations│ ═╧═5═12G═╧═╧═P═W═A══════════════╧═════════════
- (12 pin version) │
- note: some jumpers are VERTICAL, others are HORIZONTAL
- ╒════════════════╤═════════╤═══════════╤════════════╤════════════╤═════╕
- │ Jumper │ Pin │ AT Single │ AT Master │ AT Slave │ XT │
- ╞════════════════╪═════════╪═══════════╪════════════╪════════════╪═════╡
- │ Master/Slave │ 1-2 │ X │ X │ 0 │ (3) │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Slave Present │ 3-4 │ 0 │ X │ 0 │ (3) │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Active LED │ 5-6 │ X │ X │ 0 (2) │ X │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Host Slave │ 5-7 │ 0 │ 0 │ X (2) │ 0 │
- │ Present │ │ │ │ │ │
- ╠════════════════╬═════════╬═══════════╧════════════╧════════════╪═════╣
- ║ XT Mode ║ 7-8 ║ │ X ║
- ╟────────────────╬═════════╣ ├─────╢
- ║ XT Only: 40 ║ 1-2 ║ │ X ║
- ║ Mbyte Cap. ║ ST351 ║ │ ║
- ╟────────────────╬═════════╣ 12 pin version ├─────╢
- ║ XT Only: 30 ║ 3-4 ║ │ X ║
- ║ Mbyte Cap. ║ ST351 ║ │ ║
- ╟────────────────╬═════════╣ ├─────╢
- ║ XT Only: 20 ║ 1-2 & ║ │ X ║
- ║ Mbyte Cap. ║ 3-4 ║ │ ║
- ╠════════════════╬═════════╬═════════════════════════════════════╧═════╣
- │ Factory Test │ 7-9 │ FACTORY USE ONLY │
- ├────────────────┼─────────┼───────────┬────────────┬────────────┬─────┤
- │ Bus Reset (1) │ 10-12 │ 0 │ 0 │ 0 │ 0/X │
- │ High │ │ │ │ │ │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Bus Reset (1) │ 11-12 │ X │ X │ X │ X/0 │
- │ Low ┌────────┴─────────┴───────────┴────────────┴────────────┴─────┘
- └───────┘ X = Jumpered; 0 = No Jumper
-
- =============================================================================
- =============================================================================
-
- │J2 18-pin version (located
- │ on side, near rear)
- └─────┬────────────────
- │
- 1 3 5 7 9 11 13 15 17
- (front) ▀ ° ° ° ° ° ° ° °
- ° ° ° ° ° ° ° ° °
- ═════╧═2══4══6══8══10═12═14═16═18═╧═══
- │ 4-pin DC
- │
- │ AT/XT Interface Power
- │ connector ┌─1─2─3─4─┐
- │ ╒════════════════════╕ │ 0 0 0 0 │
- ────┴──────────────────┐ │:::::::::::::::::::1│ \12─G─G─5─/
- J2 Jumper Configurations│ ═══════════╧═P═W═A══════════════╧═════════════
- (18 pin version) │
- ╒════════════════╤═════════╤═══════════╤════════════╤════════════╤═════╕
- │ Jumper │ Pin │ AT Single │ AT Master │ AT Slave │ XT │
- ╞════════════════╪═════════╪═══════════╧════════════╧════════════╧═════╡
- │ Factory Test │ 1-2 │ FACTORY USE ONLY │
- ├────────────────┼─────────┼───────────┬────────────┬────────────┬─────┤
- │ Master/Slave │ 3-4 │ X │ X │ 0 │ (3) │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Slave Present │ 5-6 │ 0 │ X │ 0 │ (3) │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Host Slave │ 7-8 │ 0 │ 0 │ X (2) │ 0 │
- │ Present │ │ │ │ │ │
- ╠════════════════╬═════════╬═══════════╧════════════╧════════════╪═════╣
- ║ XT Mode ║ 9-10 ║ │ X ║
- ╟────────────────╬═════════╣ ├─────╢
- ║ XT Only: 40 ║ 3-4 ║ │ X ║
- ║ Mbyte Cap. ║ ST351 ║ │ ║
- ╟────────────────╬═════════╣ 18 pin version ├─────╢
- ║ XT Only: 30 ║ 5-6 ║ │ X ║
- ║ Mbyte Cap. ║ ST351 ║ │ ║
- ╟────────────────╬═════════╣ ├─────╢
- ║ XT Only: 20 ║ 3-4 & ║ │ X ║
- ║ Mbyte Cap. ║ 5-6 ║ │ ║
- ╠════════════════╬═════════╬═══════════╤════════════╤════════════╪═════╣
- │ HSC1 │ 11-12 │ X │ X │ X │ X │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Active LED │ 13-14 │ X │ X │ 0 (2) │ 0 │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Bus Reset (1) │ 15-16 │ 0 │ 0 │ 0 │ 0/X │
- │ High │ │ │ │ │ │
- ├────────────────┼─────────┼───────────┼────────────┼────────────┼─────┤
- │ Bus Reset (1) │ 17-18 │ X │ X │ X │ X/0 │
- │ Low ┌────────┴─────────┴───────────┴────────────┴────────────┴─────┘
- └───────┘ X = Jumpered; 0 = No Jumper
-
- (1) Bus reset active level. System dependent. A jumper must be
- installed on either Bus Reset Hi or Bus Reset Low; the
- drive will not function if neither set of pins is
- jumpered.
-
- (2) HSP/Assert "/DASP" signal: pin 39 on 40-pin AT/AT
- Interface connector. The Host Slave Present jumper and the
- Active LED jumper are mutually exclusive.
-
- (3) XT only. These jumpers are used to set the drive type
- information to be returned by the drive via the Drive
- Configuration register (I/O port 2) or the XT Interface.
-
-
- ST - 351A/X
-
- UNFORMATTED CAPACITY (MB) ________________51
- FORMATTED CAPACITY (17 SECTORS) (MB) _____42.82
- AVERAGE SECTORS PER TRACK ________________
- ACTUATOR TYPE ____________________________STEPPER
- TRACKS ___________________________________
- CYLINDERS _(Physical/Logical)_____________xx/820
- HEADS ____________________________________2/6
- DISCS ____________________________________1
- MEDIA TYPE _______________________________THIN FILM
- RECORDING METHOD _________________________RLL 2,7 (ZBR)
- INTERNAL TRANSFER RATE (mbits/sec) _______10/12/14
- SPINDLE SPEED (RPM) ______________________3,048
- AVERAGE LATENCY (mSEC) ___________________9.84
- INTERFACE ________________________________AT/XT
- SECTORS PER DRIVE ________________________83,640
- TPI (TRACKS PER INCH) ____________________1290
- BPI (BITS PER INCH) ______________________27152/28155/28922
- AVERAGE ACCESS (ms) ______________________28
- SINGLE TRACK SEEK (ms) ___________________7
- MAX FULL SEEK (ms) _______________________65
- MTBF (power-on hours) ____________________150,000
- POWER REQUIREMENTS: +12V START-UP (amps) _0.8
- +12V TYPICAL (amps) __0.10
- +5V TYPICAL (amps) ___0.11
- TYPICAL (watts) ______2.0
- MAXIMUM (watts) ______
- BUFFERED STEP PULSE RATE (micro sec) _____
- WRITE PRECOMP (cyl) ______________________N/A
- REDUCED WRITE CURRENT (cyl) ______________N/A
- LANDING ZONE (cyl)________________________AUTO PARK
- IBM AT DRIVE TYPE ________________________40, 44*
-
- Possible translation: 820 cyl, 6 heads, 17 sectors = 42,823,680
-
- Note: A "custom" or "user-definded" CMOS drivetype may ask for a
- numerical value for the Write Precompensation cylinder and for the
- Landing Zone cylinder. A basic rule-of-thumb for drive models that do
- not require the old Write Precomp technique or a Landing Zone because
- they are Auto-Parking is to add 1 to the cylinder value being used. As
- an example: If cylinders equaled 820, then both Write Precomp and
- Landing Zone would be entered as 821. Some BIOS will convert this to
- 65535 or -1, which are functionally equivalent to "none (not used)".
-
- * CHECK TO SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE"
- DRIVE TYPE AVAILABLE. (see below)
-
- PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION
-
- ZBR = Zone Bit Recording = Variable sectors per track
-
- Already low-level formatted at the factory for AT installations.
-
- Since a User-definable or Custom translation geometry may be used, it
- is imperative that the values be written down and kept with your
- permanent records for retrieval in the event of CMOS battery failure.
-
- Seagate reserves the right to change, without notice, product
- offerings or specifications. (5/6/91)