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-274A (94204-74 or 94204-65) Wren 2 HH AT (IDE) /--Master on /Slave off | /---------\ |/ Leave as is| O O O O | Power 1 J3 || 1 J2 \---------/ :::AT:(IDE):Cable::::::::::::::: :: ::::::::: 12 G G 5 =========================================================== ST-274A 94204-74 WREN 2 HH UNFORMATTED CAPACITY (MB) ________________74 FORMATTED CAPACITY (26 SECTORS) (MB) _____65.5 ACTUATOR TYPE ____________________________VOICE COIL TRACKS ___________________________________4740 CYLINDERS ________________________________948 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) ______________________13489 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 ________________________4, * Possible translation: 940 cyl, 8 heads, 17 sectors = 65,454,080 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)". * MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE. ALSO, CHECK TO SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE AVAILABLE. 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)