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-138A /컴컴컴�\ 6-pin jumper version 쿚 O O O� �5횳횳�12 袴袴袴錮袴袴袴袴袴袴袴袴袴袴錮袴袴袴袴袴� o o o �::::::::::::::::::::1� o o o 突袴袴袴袴袴袴袴袴袴袴� � � � � 0 1 Single Drive 0=open � 1 1 Dual-Drive Master 1=closed � 1 0 Dual-Drive Slave � 읕컴컴 Optional External LED /컴컴컴�\ 10-pin jumper version 쿚 O O O� �5횳횳�12 袴袴袴袴袴錮袴袴袴袴袴袴袴袴袴袴錮袴袴袴袴袴� o o o o o �::::::::::::::::::::1� o o o o o 突袴袴袴袴袴袴袴袴袴袴� � � � � � � � � � � LT (Life Test, factory use only) � � 0 1 Single Drive 0=open � � 1 1 Dual-Drive Master 1=closed � � 0 0 Dual-Drive Slave � 읕컴컴 EWS (factory use only) 읕컴컴컴 Active Busy (Optional External LED) ST - 138A UNFORMATTED CAPACITY (MB) ________________38 FORMATTED CAPACITY (26 SECTORS) (MB) _____32.1 ACTUATOR TYPE ____________________________STEPPER TRACKS ___________________________________2,416 CYLINDERS ________________________________604 HEADS ____________________________________4 DISCS ____________________________________2 MEDIA TYPE _______________________________THIN FILM RECORDING METHOD _________________________RLL TRANSFER RATE (mbits/sec) ________________7.5 SPINDLE SPEED (RPM) ______________________3,600 INTERFACE ________________________________AT BUS TPI (TRACKS PER INCH) ____________________824 BPI (BITS PER INCH) ______________________22,430 AVERAGE ACCESS (ms) ______________________40/28* SINGLE TRACK SEEK (ms) ___________________8 MTBF (power-on hours) ____________________150,000 POWER REQUIREMENTS: +12V START-UP (amps) _2.0 +12V TYPICAL (amps) __0.35 +5V TYPICAL (amps) ___0.9 TYPICAL (watts) ______9 MAXIMUM (watts) ______29 BUFFERED STEP PULSE RATE (micro sec) _____3-200 WRITE PRECOMP (cyl) ______________________N/A REDUCED WRITE CURRENT (cyl) ______________N/A LANDING ZONE (cyl)________________________AUTO PARK IBM AT DRIVE TYPE ________________________3 *ST138A-0/ST138A-1 Possible translation: 615 cyl, 6 heads, 17 sectors = 32,117,760 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)