| ST318436LW |
| |
| Technical Specifications |
 |
|
| Description |
|
| Model number |
ST318436LW |
| Model Name |
Barracuda 18XL |
| Form Factor(width) |
3.5" |
| Form Factor(height) |
low-profile |
|
| Physical Specifications |
|
| Height |
25.4 mm |
| Width |
101.6 mm |
| Length |
146.05 mm |
| Weight |
0.6 kg |
|
| Capacity/Interface |
|
| Formatted Capacity |
18.4 Gbytes, formatted |
| Interface Type |
68-pin |
|
| Performance |
|
| Transfer Rates |
|
|
| Internal Transfer Rate (min) |
195 Mbits/sec |
| Internal Transfer Rate (max) |
315 Mbits/sec |
| Formatted Int Transfer Rate (min) |
18.500000 Mbits/sec |
| Formatted Int Transfer Rate (max) |
29.400000 Mbits/sec |
| External (I/O) Transfer Rate (max) |
160 MBytes/sec |
| Avg Formatted Transfer Rate |
23.9 MBytes/sec |
| Seek Times |
|
|
| Average Seek Time, Read |
5.8 msec typical |
| Average Seek Time, Write |
6.3 msec typical |
| Track-to-Track Seek, Read |
0.5 msec typical |
| Track-to-Track Seek, Write |
0.5 msec typical |
| Full Disc Seek, Read |
10.3 msec typical |
| Full Disc Seek, Write |
10.8 msec typical |
| Average Latency |
4.17 msec |
| Other |
|
|
| Default Buffer (cache) Size |
2,048 Kbytes |
| Spindle Speed |
7200 RPM |
| Spinup Time |
25 sec |
| Power-on to Ready Time |
15 sec |
|
| Configuration |
|
| Number of Discs (physical) |
3 |
| Number of Heads (physical) |
6 |
| Total Cylinders |
14,384 |
| Total Tracks |
86,304 |
| Bytes Per Sector |
512 |
| Areal Density (Mbits/sq in) |
5,956 Mbits/square inch |
| Track Density (TPI) |
18,145 tracks/inch |
| Recording Density (BPI, max) |
328,272 bits/inch |
| Sectors/Track (avg) |
426 |
| Bytes/Track (avg) |
218,112 |
| Recording Components |
|
|
| Recording Method |
EPRML |
|
| Electrical Requirements |
|
| Current |
|
|
| Typical Current (12VDC +/- 5%) |
0.6 amps |
| Startup Current (12VDC +/- 5%) |
0.7 amps |
| Typical Current (5VDC +/- 5%) |
0.9 amps |
| Startup Current (5VDC +/- 5%) |
1.1 amps |
| Power |
|
|
| Idle Power (typ) |
6.9 watts |
|
| Environmental Specifications |
|
| Shock and Vibration |
|
|
| Max Operating Shock (11-msec) |
15 Gs |
| Max Nonoperating Shock (11-msec) |
150 Gs |
| Operating Vibration (max) |
1.1 Gs |
| Nonoperating Vibration (max) |
2.5 Gs |
| Temperature and Humidity |
|
|
| Operating Temperature (max) |
55 deg C |
| Operating Temperature (min) |
5 deg C |
| Nonoperating Temperature (max) |
70 deg C |
| Nonoperating Temperature (min) |
-40 deg C |
| Operating Temperature Change (max) |
20 deg C/hr |
| Nonoperating Temperature Change (max) |
25 deg C/hr |
| Operating Humidity (max) |
95 percent |
| Nonoperating Humidity (max) |
95 percent |
| Operating Humidity Change (max) |
10 percent per hour |
| Operating Wet Bulb Temp (max) |
28 deg C |
| Altitude |
|
|
| Operating Altitude (max) |
3,000 m |
| Operating Altitude (min) |
-300 m |
| Nonoperating Altitude (max) |
12,200 m |
| Nonoperating Altitude (min) |
-300 m |
| Acoustics |
|
|
| Acoustics, Idle (sound power, typ) |
3.5 Bels |
|
| Reliability |
|
| MTBF (Hours) |
1,200,000 hours |
| Recoverable Read Errors |
10 per 1011 bits read |
| Nonrecoverable Read Errors |
1 per 1016 bits read |
| Seek Errors |
1 per 108 bits read |
| Supports S.M.A.R.T. |
Yes |
