Toshiba SPECIFICATIONS -MK2023GAS HDD2187, General, Functionality, Reliability, Electrical

SPECIFICATIONS –MK2023GAS (HDD2187)

General
Model	MK2023GAS (HDD2187)
Interface	ATA-2/3/4/5
Motor	Fluid Dynamic Bearing (FDB)
Functionality
Formatted Capacity	20.003GB*
Rotational Speed	4200rpm
Avg. Rotational Latency	7.14/ms
Spin-up Time	4sec (typical)
Buffer	2MB
Seek Time (Average)	12
Internal Transfer Rate	164.6 ~ 257.1 Mbits/sec (max)
Host Transfer Rate	100Mbytes/sec

*Toshiba defines a megabyte (MB) as 1,000,000 bytes and a gigabyte (GB) as 1,000,000,000 bytes.

Internal Drive Characteristics
Number of Disks	1
Number of Read/Write Heads	2
Track Density (TPI)	72k
User Data Cylinders	34,040
Logical Cylinders	16,383
Logical Heads	16
Logical Sectors/track	63
Bytes per Sector	512
Logical Blocks (LBA)	39,070,080
Reliability
Preventative maintenance	None
Non-recoverable read errors	1 error per 1013 bits read
Electrical
Voltage	5V 5%
Power Consumption
Start	4.7W typ
Seek	2.6W typ
Read/Write	2.3W typ
Sleep	0.1W typ
Energy Consumption Efficiency	0.035W/GB avg
Shock
Operating	1,960m/s2 (200G)(2msec)
Non-Operating	7,840m/s2 (800G)(1msec)

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