TS20GSJ18
1.8” StoreJet Portable HDD 20GB (TOSHIBA)
Description
System Requirements
TS20GSJ18 is a USB 2.0 20GB Portable Hard Disk.
This device is a 20GB TOSHIBA 1.8” hard disk drive
(HDD) installed in a Portable Hard Disk Enclosure. It is
designed to expedite exchanging huge amounts of data
between this device and any desktop or notebook
computers.
• Desktop or notebook computers with USB port
• One of following operating systems:
Win® 98, Win® Me, Win® 2000, Win® XP, Mac™ OS
Features
• 100% Compatible with USB Interface in Windows or Mac
• USB connection for true Plug and Play
• Single Power Supply: 5V ± 10%
Outline
B
• Connector Durability: 5000 times
• Recommended operating temperature : 5℃– 60 ℃
• Supports Resume Suspend and Low power modes
• Compliant with USB specification version 1.1 & 2.0
• Support 1.8” hard disk drive. (TOSHIBA)
• LEDs indicate Power On and Data Traffic
A
Dimensions
Side
A
Millimeters
95.00 ± 1.00
71.50 ± 1.00
15.00 ± 1.00
Inches
37.40 ± 0.04
28.15 ± 0.04
5.90 ± 0.04
B
C
C
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Transcend Information Inc.
TS20GSJ18
1.8” StoreJet Portable HDD 20GB (TOSHIBA)
Specification
Size
L x W x H
95mm x 71.5mm x 15mm
118 g
Weight
Temperature
Shock resistant
Operating
5℃ – 60 ℃
250G
Operating
Non-Operating
1000G
Capacity
Sustained transfer rate
20 GBytes
16.6 MB/sec
16.4 MB/sec
480 Mb/sec
CE, FCC, BSMI
Read
Write
USB 2.0 Full Speed
Bus transfer rate
Certificate
Electrical DC Characteristics (Ta=0°C to 70°C, Vcc=3.3V±10%)
AC Characteristics
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Transcend Information Inc.
TS20GSJ18
1.8” StoreJet Portable HDD 20GB (TOSHIBA)
Hard Drive Basic Specifications:
Principal Specification
MODEL
MK2004GAL
Formatted Capacity (gigabytes)
Servo design method
Recording method
Recording density
20.000
Sector Servo
32/34 TC-EEPR4+PP
Track / mm (TPI)
3465 (88.0k)
Bit / mm (BPI)
27.4k (695k) max.
Flux change / mm (FRPI)
Number of disks
Number of data heads
Number of user data cylinders
Bytes per sector
29.1k (738k) max
1
2
38,160
512
Performance
<*1> Under the condition of normal voltage, 25oC normal temperature and bottom side down.
<*2> Average time to seek all possible adjacent track without head switching.
<*3> Weighted average time to travel between all possible combination of track calculated as below.
Weighted average access time = [ Sum of P(n)*t(n) ] / [ Sum of P(n) ], n = 1 to N.
Where, N; Total number of tracks.
P(n); Total number of seek for stroke n [ = 2*(N - n) ].
t(n); Average seek time for stroke n.
Average seek time to seek to stroke n is the average time to 1,000 seeks for stroke n, with random head
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Transcend Information Inc.
TS20GSJ18
1.8” StoreJet Portable HDD 20GB (TOSHIBA)
<*4> Average time for 1,000 full stroke seeks with random head switches.
<*5> Typical values are for the condition of normal voltage, 25oC normal temperature and placing bottom side down.
Maximum values are for all conditions specified in this document.
Supply Voltage
Power Consumption
Average (note1)
MK2004GAL
Start
Seek (note2)
1.2 W Maximum
1.4 W Typical
1.4 W Typical
0.6 W Typical
0.4 W Typical
0.2 W Typical
0.08 W Typical
Read / Write (note3)
Active idle (node4)
Low power idle (note5)
Stand-by (note6)
Sleep
(note 1) Under normal condition (25oC, 101.3 kPa (1,013 mb)) and 3.3V ± 0%.
(note 2) The seek average current is specified based on three operations per 100 ms.
(note 3) The read/write current is specified based on three operations of 63 sector read/write per 100 ms.
(note 4) Motor is rotating at normal speed but none of Read, Write or Seek is executed.
(note 5) Motor is rotating at normal speed but heads are unloaded on the ramp.
(note 6) Motor is not rotating and heads are unloaded on the ramp.
Temperature and Humidity
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Transcend Information Inc.
TS20GSJ18
1.8” StoreJet Portable HDD 20GB (TOSHIBA)
Shock
Acoustics (Sound Power)
MK2004GAL
22dB
For idle mode (Spindle in rotating).
Randomly select a track to be sought in such a way
that every track has equal probability of being selected.
Seek rate(ns) is defined by the following formura:
ns = 0.4 / ( tT = tL )
26dB
tT is published time to seek from one random track to
another without including rotational latency;
tL is the time for the drive to ratate by half a revolution.
Mean Time to Failure (MTTF)
Above technical information is based on industry standard data and tested to be reliable. However, Transcend makes
no warranty, either expressed or implied, as to its accuracy and assumes no liability in connection with the use of this
product. Transcend reserves the right to make changes in specifications at any time without prior notice.
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Transcend Information Inc.
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