Teac HD 15OT & HD-15 PUK A
1. Introduction
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Storage is becoming more and more important in our everyday computer use. The demand for larger capacity is growing as well as the need for portable storage solutions, primarily for backup use. After the initial release of 2.5" hard disk drives, many manufacturers have started providing either cases to house these drives or complete portable storage solutions. TEAC is one such manufacturer who has been releasing such devices for quite a while now.
We received two external hard disk drive enclosures, complete with Hard Disk Drives installed, from TEAC for evaluation in our labs.
- HD 15OT
The HD 15OT is an external hard disk drive enclosure with a USB 2.0 interface for storage of data, photos, music, in fact any type of file. The "One Touch Button" program, available only for Windows, allows for backup, restore and synchronisation of files with the push of a single button found on the front of the HD 150T. The device is available with one of 40, 60, 80 or 100 GB capacity hard disk installed.
| Specifications for HD 15OT | |
| Data transfer rate | max. 480 MB/s (USB 2.0 limit) |
| Seek time (average) | 15 ms |
| Interface | USB 2.0/1.1 |
| Cache | 8 MB |
| Dimensions (W x H x T) | 82 x 128 x 17 mm |
| Weight approx. | 130g |
| MTBF | 100.000 POH |
| Contents | External TEAC 2.5 inch HDD, Software, CD-ROM with Drivers, USB 2.0 cable, Multi-lingual installation manual |
| System requirements | Windows systems: IBM PC compatible Pentium III 600MHz or higher; 64MB RAM or higher; USB 2.0/1.1; Windows 98SE, ME, XP, or Windows 2000; CD-ROM drive |
| Mac systems | 32 MB RAM or higher; true G3 processor or higher; USB 2.0/1.1; Mac OS 8.6 classic, OS X or higher, CD-ROM drive |
The included Hard Disk Drive with the HD 15OT is the Fujitsu MHT2080AT. The full specifications, according to Fujitsu, can be found in the following table:
| Formatted storage capacity | 80 GB |
| Form Factor | 2.5-inch x 9.5mm |
| Bytes per sector | 512 bytes |
| Seek time (track to track) | 1.5 typ. milliseconds |
| Seek time (average) | 12 typ. milliseconds (read/write) |
| Seek time (full track) | 22 typ. milliseconds (read/write) |
| Average latency time | 7.14 milliseconds |
| Rotational speed | 4,200 RPM |
| Data transfer rate (DMA mode 2) | 16.6 MB per second |
| Data transfer rate (PIO mode 4) | 16.6 MB per second |
| Data transfer rate (UDMA mode 2) | 33.3 MB per second |
| Data transfer rate (UDMA mode 4) | 66.6 MB per second |
| Data transfer rate (UltraATA) | 100 MB per second |
| Recording code | 32/34 MEEPRML |
| Interface | ATA - 6 |
| Head positioning method | Rotary VCM Embedded Servo |
| Spindle start time | 3.5 seconds typical |
| Spindle stop time | 5 seconds typical |
| Data buffer size | 8192 KB |
| Power requirement Voltage | 5V ± 0.5% |
| Ripple | 100 mV P-P |
| Power requirement Spin up | 0.90A maximum |
| Power requirement Read/write | 2.1 W (typical) |
| Power requirement Idle (ready) | 0.65 W (typical) |
| Power requirement Sleep | 0.1 W (typical) |
| Height | 9.5 millimetres |
| Width | 70 millimetres |
| Depth | 100 millimetres |
| Weight | 0.099 kg |
| Ambient temperature (operating) | 5 to 55 degrees C |
| Ambient temperature (non-operating) | -40 to 65 degrees C |
| Gradient | 20 degrees C per hour |
| Relative humidity (operating) | 8 to 90 % RH (non-condensing) |
| Relative humidity (non-operating) | 5 to 95 % RH (non-condensing) |
| Maximum wet bulb | 29 (Op.)/ 40 (Non Op.) degrees C (non-condensing) |
| Vibration (operating) | 9.8m/s^2 (1.0G) (5 to 500Hz) |
| Vibration (non-operating) | 49m/s^2 (5.0G) (5 to 500Hz) |
| Shock (operating) | 2,205m/s^2 (225G) 2ms |
| Shock (non-operating) | 8,820m/s^2 (900G) 1ms / 1,176m/s^2 (120G) 11ms |
| Altitude (operating) | -300 to 3,000 metres |
| Altitude (non-operating) | -300 to 12,000 metres |
| Acoustic noise (at 1 metre idle) | 24 dBA typical |
| Acoustic noise (at 1 metre idle) | 2.3 bels |
| MTBF (Mean Time Between Failures) | More than 300,000 power on hours |
| MTTR (Mean Time To Repair) | 30 minutes or less |
| Component life (years) Design life used to calculate MTBF. NOT Warranty |
3 years |
| Component life (hours) | 20,000 power on hours |
| Unrecoverable errors | 1 per 10^13 bits read |
| Seek errors | 1 per 10^6 seeks |
| Start/stop cycles | 300,000 cycles |
- HD-15 PUK A
The HD-15 PUK A is similar to the HD 15OT but there is no "One Touch Button" function and off course no button on the device. Once again, the device is available with one of 40, 60, 80 or 100 GB capacity hard disk.
| Specifications for HD-15 PUK A | |
| Data Transfer Rate | up to 480 MB/sec. |
| Spindle Speed | 4200 rpm |
| Dimensions | 75 x 15 x 125 mm |
| Weight | 180g |
| Power | Bus powered |
| MTBF | 100.000 POH |
| Interface | USB 2.0 (Adapter Card not included) |
| Accessories | Software driver CD-ROM, USB 2.0 Interface cable, Installation Guide |
The included Hard Disk Drive with the HD-15 PUK A is the Fujitsu MHT2060AT.
| Formatted storage capacity | 80 GB |
| Form Factor | 2.5-inch x 9.5mm |
| Bytes per sector | 512 bytes |
| Seek time (track to track) | 1.5 typ. milliseconds |
| Seek time (average) | 12 typ. milliseconds (read/write) |
| Seek time (full track) | 22 typ. milliseconds (read/write) |
| Average latency time | 7.14 milliseconds |
| Rotational speed | 4,200 RPM |
| Data transfer rate (DMA mode 2) | 16.6 MB per second |
| Data transfer rate (PIO mode 4) | 16.6 MB per second |
| Data transfer rate (UDMA mode 2) | 33.3 MB per second |
| Data transfer rate (UDMA mode 4) | 66.6 MB per second |
| Data transfer rate (UltraATA) | 100 MB per second |
| Recording code | 32/34 MEEPRML |
| Interface | ATA - 6 |
| Head positioning method | Rotary VCM Embedded Servo |
| Spindle start time | 3.5 seconds typical |
| Spindle stop time | 5 seconds typical |
| Data buffer size | 2048 KB |
| Power requirement Voltage | 5V ± 0.5% |
| Ripple | 100 mV P-P |
| Power requirement Spin up | 0.90A maximum |
| Power requirement Read/write | 2.1 W (typical) |
| Power requirement Idle (ready) | 0.65 W (typical) |
| Power requirement Sleep | 0.1 W (typical) |
| Height | 9.5 millimetres |
| Width | 70 millimetres |
| Depth | 100 millimetres |
| Weight | 0.099 kg |
| Ambient temperature (operating) | 5 to 55 degrees C |
| Ambient temperature (non-operating) | -40 to 65 degrees C |
| Gradient | 20 degrees C per hour |
| Relative humidity (operating) | 8 to 90 % RH (non-condensing) |
| Relative humidity (non-operating) | 5 to 95 % RH (non-condensing) |
| Maximum wet bulb | 29 (Op.)/ 40 (Non Op.) degrees C (non-condensing) |
| Vibration (operating) | 9.8m/s^2 (1.0G) (5 to 500Hz) |
| Vibration (non-operating) | 49m/s^2 (5.0G) (5 to 500Hz) |
| Shock (operating) | 2,205m/s^2 (225G) 2ms |
| Shock (non-operating) | 8,820m/s^2 (900G) 1ms / 1,176m/s^2 (120G) 11ms |
| Altitude (operating) | -300 to 3,000 metres |
| Altitude (non-operating) | -300 to 12,000 metres |
| Acoustic noise (at 1 metre idle) | 24 dBA typical |
| Acoustic noise (at 1 metre idle) | 2.3 bels |
| MTBF (Mean Time Between Failures) | More than 300,000 power on hours |
| MTTR (Mean Time To Repair) | 30 minutes or less |
| Component life (years) Design life used to calculate MTBF. NOT Warranty |
3 years |
| Component life (hours) | 20,000 power on hours |
| Unrecoverable errors | 1 per 10^13 bits read |
| Seek errors | 1 per 10^6 seeks |
| Start/stop cycles | 300,000 cycles |
On the following pages we will compare the performance of both devices using several benchmark utilities.
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