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Toshiba MK2023GAS 20GB ATA-2/3/4/5 2.5" 
9.5mm 4200RPM Notebook Hard Drive (HDD2187)


Toshiba America Information Systems, Inc. (TAIS), Storage Device Division introduces the MK2023GAS 2.5-inch 20GB Hard Disk Drive. The MK2023GAS offers the industries highest areal density per platter, at 39.1gigabits per square inch. This new drive offers enough capacity for portable video recording and editing, with lower power consumption compared to the traditional 3.5-inch HDDs. This functionality provides ideal storage for a range of commercial and consumer notebooks, as well as non-PC applications such as PDAs, printers, copiers, GPS systems and MP3 players. The MK2023GAS is ATA-5 compliant, supporting high transfer rates of up to 100 megabytes per second.


  • 20.0GB capacity
  • Fluid Dynamic Bearing (FDB) motor drive
  • 9.5mm High
  • 12ms Average Seek Time
  • ATA-5 Interface
  • 100MB/sec Transfer Rate
  • 2MB Buffer
  • 300,000 MTTF Hours


Data Storage Physical:

Per drive, formatted 20.003GB
Data Heads 2
Number of Disks 1

Logical Configuration:

Heads 16
Cylinders 16,383
User Sectors/Track at zone 0 63
Logical Blocks (LBA) 39,070,080

Data Transfer Rate:

Max transfer rate to host 100MB/sec

Seek Time:

Track-to-track 2ms
Average 12ms
Maximum 22ms

Nominal Power Requirements:

Logic +5V(5%)
Start 4.7watts
Seeking 2.6watts
Reading/Writing 2.3watts
Idle 0.9watts
Standby 0.25watts
Sleep 0.1watts


Rotational Speed 4,200rpm
Average Latency 7.14ms
Interface: ATA-2/3/4/5
Buffer 2MB

Physical & Environmental Specs

  • Height 0.37" (9.5mm)
  • Width 2.75" (69.85mm)
  • Depth 3.94" (100mm)
  • Weight: 3.316 oz (94g)

Ambient Temperature:

Operating 41 - 131F (5 to 55C)
Non-Operating -4 - 140F (-20 to 60C)
Shipping -40 - 158F (-40 to 70C)
Vibration and Shock:
  • Operating Vibration 9.8 m/s2 (1.0G), 5 - 500 Hz
  • Operating Shock 200g
  • Non-Operating Shock 800g

Reliability Characteristics

Error Rates:

Non-recoverable 1 in 1013 bits
Seek 1 in 106 seeks


Preventive Maintenance None
MTTF (Power on hours) 300,000
Product Life 5 years or 20,000 power ON hours

Product Content:

  • Toshiba MK2023GAS 20GB ATA-2/3/4/5 2.5" 9.5mm 4200RPM Notebook Hard Drive

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



  • 30 Day

Availability: Usually ships the same business day

Toshiba MK2023GAS 20GB ATA-2/3/4/5 2.5" 9.5mm 4200RPM Notebook Hard Drive (HDD2187)
MK2023GASP.O & Phone Orders: $119.00ON-LINE SPECIAL: $99.00
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