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Description:
Barracuda 9LP 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.
Features:
- Integrated SCSI controller
- Single-ended or high voltage differential SCSI drivers and receivers, or low voltage differential drivers and receivers (“LC” and “LW” models only)
- 8 bit or 16 bit I/O data bus models available
- Asynchronous and synchronous data transfer protocol
- Firmware downloadable via SCSI interface
- Selectable even byte sector sizes from 512 to 4,096 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 185 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
- Active IC terminators enabled by jumpers (“N” and “W” models only)
- 512 Kbyte data buffer or 2 Mbyte optional; “LW” and “LC” model drives have 1 Mbyte, or optional 4 Mbyte data buffer
- Hot plug compatibility (section 9.6.4.3 lists proper host connector needed) for “WC” and “LC” model drives
- SCAM (SCSI Configured AutoMagically) plug-n-play level 2 compliant, factory set to level 1 (not user selectable)
- Low audible noise for office environment
- Low power consumption
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Specifications:
| FORMATTED CAPACITY (GB) |
9.105 |
| AVERAGE SECTORS PER TRACK |
237 rounded down |
| ACTUATOR TYPE |
ROTARY VOICE COIL |
| TRACKS |
75,010 |
| CYLINDERS |
7,501 user |
| HEADS (PHYSICAL) |
10 |
| DISCS (3.5 in) |
5 |
| MEDIA TYPE |
THIN FILM/MR |
| RECORDING METHOD |
EPR4 16/17 |
| INTERNAL TRANSFER RATE (mbits/sec) |
120 to 190 |
| EXTERNAL TRANSFER RATE (mbyte/sec) |
40 Sync |
| Low Voltage Differential(LVD) |
80 Sync |
| SPINDLE SPEED (RPM) |
7,200 |
| AVERAGE LATENCY (mSEC) |
4.17 |
| INTERFACE |
Ultra SCSI |
| BYTES PER TRACK |
155,000 average |
| SECTORS PER DRIVE |
17,783,240 |
| TPI (TRACKS PER INCH) |
8,250 |
| BPI (PEAK KBITS PER INCH) |
180 |
| AVERAGE ACCESS (ms read/write) |
7.4/8.2 |
| SINGLE TRACK SEEK (ms read/write) |
1.1/1.4 |
| MAX FULL SEEK (ms read/write) |
16/18 |
| MTBF (power-on hours) |
1,000,000 |
| POWER REQUIREMENTS: |
+12V START-UP (amps) - 1.7
+12V TYPICAL (amps) - 0.5 idle
+5V START-UP (amps) - 1.2
+5V TYPICAL (amps) - 0.75 idle
IDLE (watts) - 10 |
| Physical: |
Height (inches/mm): 1.0/25.4
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.47/146
Weight (lbs/kg): 1.3/0.589 |
Product Content:
- Seagate ST39173WC Barracuda 9LP 9.1GB Ultra SCSI 7200RPM Hard Drive
(9J4008-010 / 9J4008010)
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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