SEAGATE TECHNOLOGY, INC. Customer Technical Support FAX Network +1 408 438-8137 Customer Technical Support Bulletin Boards (300-9600, 8-N-1) 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 � United States +1 408 438-8771 � United Kingdom +44 628 478011 � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 � Germany +49 89 140-9331 � Singapore +65 227-2217 � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸 (C)opyright 1991 ST-351A/X AT/XT Interface 쿕2 12-pin version (located � on side, near rear) 읕컴컴쩡컴컴컴컴컴컴컴� � 1 3 5 7 9 11 (front) � � � � � � (back) � � � � � � 袴袴賈�2袴4袴6袴8袴10�12賈袴� � 4-pin DC � � 3-pin DC AT/XT Interface Power � Power connector 旼1�2�3�4커 � 郞1�2�3拷 郞袴袴袴袴袴袴袴袴袴拷 � 0 0 0 0 � 컴컴좔컴컴컴컴컴컴컴컴커 � 0 0 0 � �:::::::::::::::::::1� \12횳횳�5�/ J2 Jumper Configurations� 賈�5�12G賈賈�P�W�A袴袴袴袴袴袴袴鳩袴袴袴袴袴袴 (12 pin version) � note: some jumpers are VERTICAL, others are HORIZONTAL 郞袴袴袴袴袴袴袴錮袴袴袴袴錮袴袴袴袴袴錮袴袴袴袴袴袴佶袴袴袴袴袴錮袴袴拷 � Jumper � Pin � AT Single � AT Master � AT Slave � XT � 팠袴袴袴袴袴袴袴曲袴袴袴袴曲袴袴袴袴袴曲袴袴袴袴袴袴妄袴袴袴袴袴曲袴袴孤 � Master/Slave � 1-2 � X � X � 0 � (3) � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Slave Present � 3-4 � 0 � X � 0 � (3) � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Active LED � 5-6 � X � X � 0 (2) � X � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Slave � 5-7 � 0 � 0 � X (2) � 0 � � � � � � � � 勁袴袴袴袴袴袴袴誥袴袴袴袴誥袴袴袴袴袴賈袴袴袴袴袴袴鳩袴袴袴袴袴曲袴袴攷 � XT Mode � 7-8 � � X � 픔컴컴컴컴컴컴컴켑袴袴袴袴攷 쳐컴컴� � XT Only: 40 � 1-2 � � X � � Mbyte Cap. � ST351 � � � 픔컴컴컴컴컴컴컴켑袴袴袴袴攷 12 pin version 쳐컴컴� � XT Only: 30 � 3-4 � � X � � Mbyte Cap. � ST351 � � � 픔컴컴컴컴컴컴컴켑袴袴袴袴攷 쳐컴컴� � XT Only: 20 � 1-2 & � � X � � Mbyte Cap. � 3-4 � � � 勁袴袴袴袴袴袴袴誥袴袴袴袴誥袴袴袴袴袴袴袴袴袴袴袴袴袴袴袴袴袴袴賈袴袴攷 � Factory Test � 7-9 � FACTORY USE ONLY � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컫컴컴컴컴컴컴쩡컴컴컴컴컴컫컴컴캑 � Bus Reset (1) � 10-12 � 0 � 0 � 0 � 0/X � � High � � � � � � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Bus Reset (1) � 11-12 � X � X � X � X/0 � � Low 旼컴컴컴컨컴컴컴컴컨컴컴컴컴컴컨컴컴컴컴컴컴좔컴컴컴컴컴컨컴컴켸 읕컴컴컴� X = Jumpered; 0 = No Jumper ============================================================================= ============================================================================= 쿕2 18-pin version (located � on side, near rear) 읕컴컴쩡컴컴컴컴컴컴컴� � 1 3 5 7 9 11 13 15 17 (front) � � � � � � � � � � � � � � � � � � 袴袴賈�2袴4袴6袴8袴10�12�14�16�18賈袴� � 4-pin DC � � AT/XT Interface Power � connector 旼1�2�3�4커 � 郞袴袴袴袴袴袴袴袴袴拷 � 0 0 0 0 � 컴컴좔컴컴컴컴컴컴컴컴커 �:::::::::::::::::::1� \12횳횳�5�/ J2 Jumper Configurations� 袴袴袴袴袴賈�P�W�A袴袴袴袴袴袴袴鳩袴袴袴袴袴袴 (18 pin version) � 郞袴袴袴袴袴袴袴錮袴袴袴袴錮袴袴袴袴袴錮袴袴袴袴袴袴佶袴袴袴袴袴錮袴袴拷 � Jumper � Pin � AT Single � AT Master � AT Slave � XT � 팠袴袴袴袴袴袴袴曲袴袴袴袴曲袴袴袴袴袴賈袴袴袴袴袴袴鳩袴袴袴袴袴賈袴袴孤 � Factory Test � 1-2 � FACTORY USE ONLY � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컫컴컴컴컴컴컴쩡컴컴컴컴컴컫컴컴캑 � Master/Slave � 3-4 � X � X � 0 � (3) � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Slave Present � 5-6 � 0 � X � 0 � (3) � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Slave � 7-8 � 0 � 0 � X (2) � 0 � � � � � � � � 勁袴袴袴袴袴袴袴誥袴袴袴袴誥袴袴袴袴袴賈袴袴袴袴袴袴鳩袴袴袴袴袴曲袴袴攷 � XT Mode � 9-10 � � X � 픔컴컴컴컴컴컴컴켑袴袴袴袴攷 쳐컴컴� � XT Only: 40 � 3-4 � � X � � Mbyte Cap. � ST351 � � � 픔컴컴컴컴컴컴컴켑袴袴袴袴攷 18 pin version 쳐컴컴� � XT Only: 30 � 5-6 � � X � � Mbyte Cap. � ST351 � � � 픔컴컴컴컴컴컴컴켑袴袴袴袴攷 쳐컴컴� � XT Only: 20 � 3-4 & � � X � � Mbyte Cap. � 5-6 � � � 勁袴袴袴袴袴袴袴誥袴袴袴袴誥袴袴袴袴袴錮袴袴袴袴袴袴佶袴袴袴袴袴曲袴袴攷 � HSC1 � 11-12 � X � X � X � X � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Active LED � 13-14 � X � X � 0 (2) � 0 � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Bus Reset (1) � 15-16 � 0 � 0 � 0 � 0/X � � High � � � � � � 쳐컴컴컴컴컴컴컴컵컴컴컴컴컵컴컴컴컴컴컵컴컴컴컴컴컴탠컴컴컴컴컴컵컴컴캑 � Bus Reset (1) � 17-18 � X � X � X � X/0 � � Low 旼컴컴컴컨컴컴컴컴컨컴컴컴컴컴컨컴컴컴컴컴컴좔컴컴컴컴컴컨컴컴켸 읕컴컴컴� 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 = 42,823,680 980 cyl, 5 heads, 17 sectors = 42,649,600 977 cyl, 5 heads, 17 sectors = 42,519,040 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)