SEAGATE TECHNOLOGY, INC. Customer Technical Support FAX Network +1 408 438-8137 Customer Technical Support Bulletin Boards (300-9600, 8-N-1) ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ United States +1 408 438-8771 ³ United Kingdom +44 628 478011 ³ ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´ ³ Germany +49 89 140-9331 ³ Singapore +65 227-2217 ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ (C)opyright 1993 ST-3550A (Medalist 455) Rear View Mini Power ÚÄ 40 pin AT Interface I/O connector Connector ³ 2 ÚÄÁÄ¿ ³ (TOP) DC power ³o o³ 5 G ÕÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍ͸ /Ä5ÄGÄGÄ12\ ͵o oƵ0 0 0Æ͵::::::::::ú::::::::1Æ͵ 0 0 0 0 ÆÍ ...Ä¿ 1 ³ 12 ÔÍÍÍÍÍÍÍÍÍͳÍÍÍÍÍÍÍÍ; ÀÄÄÄÄÄÄÄÄÄÙ ³ ³ ³ (BOTTOM) À(pin 20 missing for (Factory test jumper ³ ³ keying purposes) block located at side) ³ ³ OFF OFF Drive is Master (single) OFF ON Drive is Master with Slave present (dual) ON OFF Drive is Slave (dual) ON ON Cable Select (requires jumper also on pins 6 and 8 of J8) Spare jumper may be stored on pins 1 and 3. ST-3550A Front View ÚÄÄÄÄÄÄÄÄÄÄ Cable Select (pins 6 and 8) ³ ÚÄÄÄÄÄÄÄÄ Spindle Clock to I/O pin-28 (pins 8 and 10) ³ ³ ÚÄÄÄÄÄÄ Ext. Spindle Clock Synch J8 6-8 ³ (see note below) (TOP) o o o o-o o o+ ÍÍÍÍ o Í o o o o o-ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ (BOTTOM) 1ÀÄÄÄÂÄÙ ³ ³ ³ ³ ³ ³ ÀÄÄ Remote LED ³ ³ ÀÄÄÄÄ Reserved ³ ÀÄÄÄÄÄÄ Clock Ground for Ext. SPSYNC ³ Ú Reserved ÀÄÄÄÄÄÄÄÄÄ´ Reserved ³ Reserved pin-3 removed for key À Reserved Spindle Sync note: Enable pin-28 (SPSYNC-) of the AT interface connector by installing a jumper on pins 8 and 10 of the options jumper block. Connect a twisted pair to pins 9 and 10 of the options jumper block to transmit and receive SPSYNC-. ST-3550A Medalist 455 UNFORMATTED CAPACITY _____________________ FORMATTED CAPACITY (xx SECTORS) __________452.41 ACTUATOR TYPE ____________________________VOICE COIL CYLINDERS __PHYSICAL/LOGICAL______________ HEADS ______PHYSICAL/LOGICAL______________5 DISCS (3.5 in) ___________________________3 MEDIA TYPE _______________________________THIN FILM HEAD TYPE ________________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) INTERNAL TRANSFER RATE (mbits/sec) _______21.6 to 36.3 DMA SUPPORT ______________________________EISA Type B SPINDLE SPEED (RPM) ______________________4,500 AVERAGE LATENCY (mSEC) ___________________6.67 BUFFER ___________________________________256 Kbyte SeaCache Read/Write Multiple, Read Look-Ahead, Multi-Segmented INTERFACE ________________________________AT SECTORS PER DRIVE ________________________883,624 BYTES PER CYLINDER _______________________ TPI (TRACKS PER INCH) ____________________2,400 BPI (BITS PER INCH) ______________________52,602 AVERAGE ACCESS (ms) ______________________12 SINGLE TRACK SEEK (ms) ___________________<4 MAX FULL SEEK (ms) _______________________32 MTBF (power-on hours) Office _____________250,000 POWER DISSIPATION (watts) ________________ POWER REQUIREMENTS: +12V START-UP (amps) _1.9 POWER MANAGEMENT (Watts): ACTIVE _______________5.4 IDLE _________________3.15 STANDBY ______________0.9 WRITE PRECOMP (cyl) ______________________N/A REDUCED WRITE CURRENT (cyl) ______________N/A LANDING ZONE (cyl) _______________________AUTO IBM AT DRIVE TYPE ________________________* Physical: Height (inches/mm): 1.00/25.4 Width (inches/mm): 4.02/102.1 Depth (inches/mm): 5.77/146.6 Weight (lbs/kg): 1.5/0.68 * MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE. (see below) Possible translation: 1018 cyl, 14 heads, 62 sectors = 452,415,488 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)". PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION ZBR = Zone Bit Recording = Variable sectors per track Already low-level formatted at the factory. 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. (08/09/94)