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ST1480N.TXT
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1993-05-13
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SEAGATE TECHNOLOGY, INC.
Customer Technical Support FAX Network +1 408 438-8137
Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
⁄ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¬ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒø
≥ United States +1 408 438-8771 ≥ United Kingdom +44 628 478011 ≥
√ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ≈ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¥
≥ Germany +49 89 140-9331 ≥ Singapore +65 227-2217 ≥
¿ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¡ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒŸ
(C)opyright 1991
ST-1480N SCSI-2
…ÕÕÕÕÕÕÕÕÕÕÕª
∫ REAR VIEW ∫
»ÕÕÕÕÕÕÕÕÕÕÕº
50 pin I/O Cable Connection
’ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ1∏
J4≥:::::::::::::::::::::::::≥ /ƒƒƒƒƒƒƒƒƒ\
ÕœÕÕPÕWÕAÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ≥ 0 0 0 0 ≥ÕÕ
⁄ƒƒƒƒƒƒ1 ⁄ƒƒƒƒƒƒ1 ⁄ƒƒƒƒƒƒ1 ¿ƒ5ƒGƒGƒ12Ÿ
¿ƒƒƒƒƒƒŸ ¿ƒƒƒ¬ƒƒŸ ¿ƒƒƒƒƒƒŸ
¿Terminating ResistorsŸ
…ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕª
∫ LEFT SIDE VIEW ∫
»ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕº
12345678
’ÕÕÕÕÕÕÕÕ∏
FRONT J6≥::::::::≥ BACK
OF ÕÕÕÕÕÕÕÕÕÕœ1ÕÕÕÕÕÕÕœÕÕÕÕÕÕPÕWÕAÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ OF
DRIVE ≥≥≥≥≥≥≥≥ DRIVE
Factory Use Ÿ≥≥≥≥≥≥¿ Terminator Power (see below)≥
Motor Start ƒŸ≥≥≥≥¿ƒ Terminator Power (see below)√ƒƒø
Start Delay ƒƒŸ≥≥¿ƒƒ Reserved ≥
Write Protect ƒƒƒŸ¿ƒƒƒ Parity ⁄ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¡ƒƒƒƒƒƒƒƒƒƒø
≥ Termination Power-source Table ≥
√ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ¡ƒƒƒƒƒƒƒƒø
≥ 7 8 7 8 7 8 ≥
≥ ÷ƒ∑ ÷ƒ∑ ÷ƒƒƒ∑ A Drive Supplies Own ≥
≥ ¯∫¯∫ ∫¯∫¯ ”¯ƒ¯Ω B Drive Supplies Bus ≥
≥ ¯”¯Ω ”¯Ω¯ ¯ ¯ C Bus Supplies Drive ≥
≥ A B C ≥
‘ÕÕÕÕÕÕÕÕÕÕÕÕPÕWÕAÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕæ
…ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕª
∫ RIGHT SIDE VIEW ∫
»ÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕº
’ÕÕ1∏
BACK J5≥:::≥ FRONT
OF ÕÕÕÕÕœÕÕÕœÕÕÕPÕWÕAÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ OF
DRIVE ≥≥≥ DRIVE
ID 4 ƒŸ≥¿ƒ ID 1 If these ID jumpers are used,
ID 2 then ID jumpers shown in front
view ARE NOT USED.
…ÕÕÕÕÕÕÕÕÕÕÕÕª
∫ FRONT VIEW ∫
»ÕÕÕÕÕÕÕÕÕÕÕÕº
If these ID jumper are used,
’ÕÕÕÕÕ∏ then ID jumpers shown in right side
J7≥:::::≥ view ARE NOT USED.
ÕÕœ1ÕÕÕÕœÕÕÕÕÕÕÕPÕWÕAÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕÕ
≥≥≥≥≥
ID 1 Ÿ≥≥≥¿ Remote LED
ID 2 ƒŸ≥¿ƒ Spindle Synchronization
ID 4
ST - 1480N
UNFORMATTED CAPACITY (MB) ________________492
FORMATTED CAPACITY (xx SECTORS) (MB) _____426*
AVERAGE SECTORS PER TRACK ________________62
ACTUATOR TYPE ____________________________VOICE COIL
TRACKS ___________________________________13,302
CYLINDERS ________________________________1476 (user)
HEADS ____________________________________9
DISCS ____________________________________5
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR
INTERNAL TRANSFER RATE (mbits/sec) _______17 to 25
SPINDLE SPEED (RPM) ______________________4,412
AVERAGE LATENCY (mSEC) ___________________6.8
BUFFER ___________________________________64 Kbyte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2
BYTES PER TRACK __________________________37,037 avg
SECTORS PER DRIVE ________________________823,608
TPI (TRACKS PER INCH) ____________________1760
BPI (BITS PER INCH) ______________________
AVERAGE ACCESS (ms) ______________________14
SINGLE TRACK SEEK (ms) ___________________2.5
MAX FULL SEEK (ms) _______________________26
MTBF (power-on hours) ____________________150,000
POWER REQUIREMENTS: +12V START-UP (amps) _2.5
+12V TYPICAL (amps) __0.54
+5V TYPICAL (amps) ___0.53
TYPICAL (watts) ______9.1
MAXIMUM (watts) ______15
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 ________________________0 or NONE
* 512 bytes per sector, one spare sector per track,
two spare cylinders per unit.
Already low-level formatted at the factory.
ZBR = Zone Bit Recording = Variable sectors per track
Seagate reserves the right to change, without notice, product
offerings or specifications. (4/12/91)