Seagate ST39175LW SCSI Hard Drive

Capacity: 9GB
Spindle Speed: 7,200RPM
Interface Type: SCSI 68pin / HD68 Female
Disk Size: 3.5″x1.0″ (LFF Hard Drive)
Sustained Throughput (MBps): 25.3
Average Seek Time (read/write ms): 6.9 / 7.7
Electrical Interface Speed: SCSI Ultra2 Wide – 80MBps 16-bit
On-Board Cache: 1MB

Barracuda 18LP drives combine magnetoresistive (MR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a SCSI-3 (Fast-20 and Fast-40) interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.

Fast-20 and Fast-40 (also known as Ultra-1 SCSI and Ultra-2 SCSI, respectively) are negotiated transfer rates. These transfer rates will occur only if your host adapter also supports these data transfer rates. This drive also operates at SCSI-1 and SCSI-2 data transfer rates for backward compatibility with non-Fast-20/Fast-40 capable SCSI host adapters.

UNFORMATTED CAPACITY (GB) ________________
       FORMATTED CAPACITY (GB) __________________9.10
       AVERAGE SECTORS PER TRACK ________________303 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________58,605
       CYLINDERS ________________________________11,721 user
       HEADS ______PHYSICAL______________________5
       DISCS (3.5 in) ___________________________3
       MEDIA TYPE _______________________________THIN FILM/MR
       RECORDING METHOD _________________________PRML 16/17 EPR4
       INTERNAL TRANSFER RATE (mbits/sec)________137 to 240
       EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync
            Low Voltage Differential(LVD) _______80 Sync
       SPINDLE SPEED (RPM) ______________________7,200
       AVERAGE LATENCY (mSEC) ___________________4.17
       BUFFER (/optional)________________________1024/4096 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________Ultra2 SCSI
              ASA II, SCAM level 2 (1 default)
       BYTES PER TRACK __________________________186 KByte avg
       SECTORS PER DRIVE ________________________17,783,240
       TPI (TRACKS PER INCH) ____________________12,580
       BPI (PEAK KBITS PER INCH) ________________223
       AVERAGE ACCESS (ms read/write)____________6.9/7.7
         Drive level without controller overhead
       SINGLE TRACK SEEK (ms read/write) ________0.9/1.2
       MAX FULL SEEK (ms read/write) ____________15/16
       MTBF (power-on hours) ____________________1,000,000
       SHOCK (G's, 11/2 ms):
                operating (Read/Write) __________5
                abnormal ________________________10
                nonoperating ____________________75/150
       ACOUSTICS (Bels typical, sound power) ____4.1
       POWER DISSIPATION (watts/BTUs) Active ____16.8/57.3
                                      Idle ______9.75/33.3
       POWER REQUIREMENTS: +12V START-UP (amps) _1.6
                           +12V TYPICAL (amps) __0.5 idle
                           +5V START-UP (amps) __1.05
                           +5V TYPICAL (amps) ___0.75 idle
                           IDLE (watts) _________
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):      1.0/25.4
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.75/146
                        Weight    (lbs/kg):      1.3/0.589

Already low-level formatted at the factory with x spare sectors at
the end of each x cylinder region.  

ZBR = Zone Bit Recording = Variable sectors per track