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 1991 ST-280A (94204-81 or 94204-71) Wren 2 HH AT (IDE) ÚÄÄ Master on /Slave off ³ ³ Factory Ú12ÄGÄGÄ5Ä¿ Power AT Cable Connector ³ 1 J2 ³ 0 0 0 0 ³ 1::::::::ù:::::::::: :: ::::::::: \Ä1Ä2Ä3Ä4Ä/ ÍÍÍÍÍÍÍÍÍÍÑÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ pin-20 key ³ ³ ³ For "non-C" model, jumper, if present, ³ ³ must remain on. Drive will not operate ÀÄÄ´ properly if jumper is removed (or added ³ if not originally there). ³ ³ For "C" model, jumper on indicates No ³ Slave Present; jumper off means Slave ³ Drive Is Present. ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Note: There are two different revisions of the ST280A 1. If you have a 94204-xxC, then you can connect two different model drives on the same host adapter. (i.e. a 94204-xxC and a 94354-xxx drive) 2. If you do not have a "C" after the model number, then you can only connect two similar Wren 2 94204-xx model drives. ST-280A 94204-71 WREN 2 HH UNFORMATTED CAPACITY (MB) ________________80.6 FORMATTED CAPACITY (27 SECTORS) (MB) _____71.3 ACTUATOR TYPE ____________________________VOICE COIL TRACKS ___________________________________5160 CYLINDERS ________________________________1032 HEADS ____________________________________5 DISCS ____________________________________3 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________RLL TRANSFER RATE (mbytes/sec) _______________0.937 SPINDLE SPEED (RPM) ______________________3,600 BUFFER ___________________________________32 Kbyte Read Look-Ahead, Non-Adaptive, Single-Segmented Buffer INTERFACE ________________________________AT TPI (TRACKS PER INCH) ____________________960 BPI (BITS PER INCH) ______________________14357 AVERAGE ACCESS (ms) ______________________29 SINGLE TRACK SEEK (ms) ___________________5 MTBF (power-on hours) ____________________40,000 POWER REQUIREMENTS: +12V START-UP (amps) _4.5 +12V TYPICAL (amps) __1.5 +5V START-UP (amps) __0.6 +5V TYPICAL (amps) ___0.4 TYPICAL (watts) ______20 MAXIMUM (watts) ______58 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 ________________________45, * * MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE. Possible Translation: 1024 cyl, 8 heads, 17 sectors = 71,303,168 Possible Translation: 516 cyl, 10 heads, 27 sectors = 71,331,840 Possible Translation: 745 cyl, 11 heads, 17 sectors = 71,329,280 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 WARNING - 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. (6/26/90)