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 1994 ST-3780A (Medalist 720) ÉÍÍÍÍÍÍÍÍÍÍÍ» º REAR VIEW º ÈÍÍÍÍÍÍÍÍÍÍͼ 40 pin I/O Cable Connection J1 2o o ³ 1o o ÕÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍÍ͸ /ÄÄÄÄÄÄÄÄÄ\ TOP (HDA) ÍØÍØÍ͵::::::::::ú::::::::1Æͳ 0 0 0 0 ³ÍÍ ³ ³ ÔÍÍÍÍÍÍÍÍÍͳÍÍÍÍÍÍÍÍ; ÀÄ5ÄGÄGÄ12Ù BOTTOM ³ ³ ³ ³ ³ ÀÄÄÄ pin-20 removed ³ ³ OFF OFF -- One drive only ON OFF -- Drive is slave OFF ON -- Drive is Master with slave present ON ON -- Cable Select (must also jumper pins 6 and 8 on J8) SPARE -- stored on pins 1-3 ST-3780A ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» º Front View º ÈÍÍÍÍÍÍÍÍÍÍÍÍÍͼ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄ Spare - as shipped ³ ÚÄÄÄÄÄÄÄÄ Cable Select pins 6-8 (TOP) ³ ³ ÚÄÄÄÄ Reserved ³ ³ ³ ÚÄ Remote LED 13-, 14+ ³ ³ ÚÁ¿ ³ J8 o o oÁo o o o14 Option Block ÍÍÍÍÍÍÍÍ1o o o o o o ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPWAÍÍÍÍÍÍÍÍÍÍ ³ (BOTTOM) ÀÄÄ pin 3 missing Cable Select also requires Slave and Slave Present jumpers ON. ST-3780A ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ» º RIGHT SIDE VIEW º ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ ÚÄÄÄ J6 Dual Drive emulation pins 1-2 AND pins 3-4 ³ (spare jumper stored on pins 1-3, as shipped) 2o o BACK Õ͸ 1o o TOP (HDA) FRONT OF ÆÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ OF DRIVE Ô; BOTTOM DRIVE Note: If the Dual Drive Emulation jumper is used, then TWO CMOS drive types will be required and only ONE drive per cable is allowed. ST-3780A Medalist 720 UNFORMATTED CAPACITY _____________________ FORMATTED CAPACITY (xx SECTORS) __________722 ACTUATOR TYPE ____________________________VOICE COIL CYLINDERS __PHYSICAL______________________3,876 HEADS ______PHYSICAL______________________4 DISCS (3.5 in) ___________________________2 MEDIA TYPE _______________________________THIN FILM HEAD TYPE ________________________________THIN FILM RECORDING METHOD _________________________ZBR RLL (1,7) INTERNAL TRANSFER RATE (Mbits/sec) _______27.9 to 47.24 EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6 PIO MODE _________________________________4 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 ________________________1,410,864 TPI (TRACKS PER INCH) ____________________4,250 BPI (BITS PER INCH) ______________________70,101 AVERAGE ACCESS (ms) (read/write) _________12/14 SINGLE TRACK SEEK (ms) ___________________3.5 MAX FULL SEEK (ms) _______________________25 MTBF (power-on hours) Office _____________300,000 SHOCK (G's): operating (Read/Write) __________2 nonoperating ____________________75 ACOUSTICS (typ/max dBA) __________________30/36 POWER DISSIPATION (watts) ________________ POWER REQUIREMENTS: +12V START-UP (amps) _1.9 POWER MANAGEMENT (Watts): ACTIVE _______________6.6 IDLE _________________2.75 STANDBY ______________1 WRITE PRECOMP (cyl) ______________________N/A REDUCED WRITE CURRENT (cyl) ______________N/A LANDING ZONE (cyl) _______________________AUTO IBM AT DRIVE TYPE ________________________* Physical: Height (inches/mm): 1/25.4 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 translations: This translation is generally acceptable, as is, for non-DOS operating systems: 1399 cyl, 16 heads, 63 sectors = 722,018,304 DOS operating systems may require a system bios that accepts or translates larger values for the CMOS head parameter which lowers cylinders below 1024: 699 cyl, 32 heads, 63 sectors = 721,502,208 Other FULL-CAPACITY solutions for DOS operating systems include third-party drive preparation software, system BIOS which supports LBA mode or bios driven host adapters. Otherwise, capacity may be limited to: 699 cyl, 16 heads, 63 sectors = 360,751,104 (Master) 699 cyl, 16 heads, 63 sectors = 360,751,104 (Slave see Dual Drive emulation jumper) 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. (08/17/94)