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Description:
| Barracuda 18XL drives combine magnetoresistive (GMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a SCSI-3 (Fast-20, Fast 40, and Fast-80) interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.
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Features:
- Integrated SCSI controller
- SCSI multimode single-ended or low voltage differential drivers and receivers
- 8 bit or 16 bit I/O data bus models available
- Asynchronous and synchronous data transfer protocol
- Firmware downloadable via SCSI interface
- Selectable sector sizes from 512 to 4,096 bytes/sector in multiples of 2 bytes/sector
- Programmable drive capacity
- 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 correction capability up to 240 bits
- Sealed head and disc assembly
- No preventative maintenance or adjustment required
- Dedicated laser textured head landing zone
- Embedded servo data rather than a separate servo data surface
- 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
- 2 MByte data buffer standard (1 Mbyte on some drives, see Table 1) or 4 Mbyte optional
- Hot plug compatibility
- Low audible noise for office environment
- Low power consumption
Specifications:
| FORMATTED CAPACITY (GB) |
9.186 |
| AVERAGE SECTORS PER TRACK |
415 rounded down |
| ACTUATOR TYPE |
ROTARY VOICE COIL |
| TRACKS |
43,152 |
| CYLINDERS |
14,384 user |
| HEADS (PHYSICAL) |
3 |
| DISCS (3.5 in) |
2 |
| MEDIA TYPE |
THIN FILM/GMR |
| RECORDING METHOD |
PRML 16/17 EPR4 |
| INTERNAL TRANSFER RATE (mbits/sec) |
195 to 315 |
| INTERNAL FORMATTED TRANSFER RATE (MB/sec) |
24.7 to 39.4 |
EXTERNAL TRANSFER RATE (mbyte/sec)
Low Voltage Differential(LVD) |
40 Sync
80/160 Sync |
| SPINDLE SPEED (RPM) |
7,200 |
| AVERAGE LATENCY (mSEC) |
4.17 |
BUFFER (/option LWV and LCV)
Read Look-Ahead, Adaptive,Multi-Segmented Cache |
2MB/4MB |
INTERFACE
Low Voltage Differential
ASA II, SCAM level 2 (1 default) |
Ultra SCSI Wide
Ultra3-SCSI Wide |
| BYTES PER TRACK |
213Kbytes avg |
| SECTORS PER DRIVE |
17,942,584 |
| TPI (TRACKS PER INCH) |
18,145 |
| BPI (PEAK KBITS PER INCH) |
328.2 |
AVERAGE ACCESS (ms read/write)
Drive level without controller overhead |
6.0/6.5 |
| SINGLE TRACK SEEK (ms read/write) |
0.7/0.7 |
| MAX FULL SEEK (ms read/write) |
10.5/11.0 |
| MTBF (power-on hours) |
1,200,000 |
| POWER REQUIREMENTS: |
+12V START-UP (amps) = 2.4
+12V TYPICAL (amps) = 0.30 idle
+5V START-UP (amps) = 1.0
+5V TYPICAL (amps) = 0.80 idle |
| Physical: |
Height (inches/mm): 1.0/25.4
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.75/146
Weight (lbs/kg): 1.5/0.68 |
Product Content:
- Seagate ST39236LC - Barracuda 18LX 9.19GB Ultra SCSI Wide 80-Pin 7200RPM Hard Drive
- - SOFTWARE NOT INCLUDED -
Before you purchase this item, please ensure that you have verified compatibility with system by visiting the manufacturer's web site.
We assume no responsibility and will not accept full refunds for items purchased that are not compatible with your system configuration.
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Conditions:
Warranty:
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