Seagate Cheetah 18XL 18GB 10K U160 68pin SCSI Hard Drive ST318404LW

Capacity: 18GB
Spindle Speed: 10,000RPM
Interface Type: SCSI 68pin / HD68 Female
Disk Size: 3.5"x1.0" (LFF Hard Drive)
Sustained Throughput (MBps): 52 to 68
Average Seek Time (read/write ms): 5.2 / 6.2
Electrical Interface Speed: SCSI LVD U160 - 160MBps 16-bit
On-Board Cache: 4MB

Standard features

The Cheetah 18XL family has the following standard features:

• Integrated Ultra160 SCSI controller
• Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD)
• 16 bit I/O data bus
• Asynchronous and synchronous data transfer protocol
• Firmware downloadable via SCSI interface
• Selectable even byte sector sizes from 512 to 4,096 bytes/sector
• Programmable sector reallocation scheme
• Flawed sector reallocation at format time
• Programmable auto write and read reallocation
• Reallocation of defects on command (post format)
• Enhanced ECC maximum burst correction length of 240 bits with a guaranteed burst correction length of 233 bits.
• Sealed head and disc assembly
• No preventative maintenance or adjustment required
• Dedicated head landing zone
• Embedded servo design
• Self diagnostics performed when power is applied to the drive
• 1:1 Interleave
• Zoned bit recording (ZBR)
• Vertical, horizontal, or top down mounting
• Dynamic spindle brake
• 4,096 kbyte data buffer
• Hot plug compatibility (Section 9.6.4.2 lists proper host connector needed) for “LC” model drives
• Drive Self Test (DST)

Compatibility

ST-318404LW               UNFORMATTED CAPACITY (GB)
________________         FORMATTED CAPACITY (GB)
__________________18.351         AVERAGE SECTORS PER TRACK
________________415 rounded down         ACTUATOR TYPE
____________________________ROTARY VOICE COIL         TRACKS
___________________________________86,304         CYLINDERS
________________________________14,384 user         HEADS
______PHYSICAL______________________6         DISCS (3.5 in)
___________________________3         MEDIA TYPE
_______________________________THIN FILM/GMR         RECORDING
METHOD _________________________PRML 16/17 EPR4         INTERNAL
TRANSFER RATE (mbits/sec)________285 to 424         INTERNAL
FORMATTED TRANSFER RATE (MB/sec)_26 to 40         EXTERNAL TRANSFER
RATE (mbyte/sec) _______40 Sync              Low Voltage
Differential(LVD) _______80/160 Sync         SPINDLE SPEED (RPM)
______________________10,033         AVERAGE LATENCY (mSEC)
___________________2.99         BUFFER (/optional)
_______________________4MB/16MB           Read Look-Ahead,
Adaptive,           Multi-Segmented Cache         INTERFACE
________________________________Ultra SCSI Wide                Low
Voltage Differential __________Ultra3-SCSI Wide                ASA
II, SCAM level 2 (1 default)         BYTES PER TRACK
__________________________203,008 avg         SECTORS PER DRIVE
________________________35,843,669         TPI (TRACKS PER INCH)
____________________18,145         BPI (PEAK KBITS PER INCH)
________________339         AVERAGE ACCESS (ms
read/write)____________5.2/5.8           Drive level without
controller overhead         SINGLE TRACK SEEK (ms read/write)
________0.6/0.9         MAX FULL SEEK (ms read/write)
____________10.0/11.0         MTBF (power-on hours)
____________________1,200,000         SHOCK (G's, 11/2/.5 ms):     
            operating (Read/Write) __________15                 
abnormal ________________________15                  nonoperating
____________________150/250/         ACOUSTICS (Bels typical)
________Idle ____3.8                                           Max
____         POWER DISSIPATION (watts/BTUs) Active ____/           
                            Idle ______8.5/29.0         POWER
REQUIREMENTS: +12V START-UP (amps) _1.7                            
+12V TYPICAL (amps) __0.40 idle                             +5V
START-UP (amps) __0.7                             +5V TYPICAL
(amps) ___0.70 idle                             IDLE (watts)
_________9         IBM AT DRIVE TYPE ________________________0 or
NONE           Physical:                          Height
(inches/mm):     1.02/26.13                          Width 
(inches/mm):     4.01/101.98                          Depth 
(inches/mm):     5.77/146.68                          Weight   
(lbs/kg):      1.5/0.680