User's Manual

Device Overview
(6) Write cache
When the disk drive receives a write command, the disk drive posts the command
completion at completion of transferring data to the data buffer completion of
writing to the disk media. This feature reduces the access time at writing.
1.2 Device Specifications
1.2.1 Specifications summary
Table 1.1 shows the specifications of the disk drives.
Table 1.1 Specifications (1/2)
MHW2120BK MHW2080BK MHW2060BK
Format Capacity (*1, *2) 120 GB 80 GB 60 GB
Number of Sectors (User) 234,441,648 156,301,488 117,210,240
Bytes per Sector 512 bytes
Rotational Speed
7,200 rpm ± 1%
Average Latency 4.17 ms
Positioning time (read and seek)
• Minimum (Track-Track)
• Average
• Maximum (Full)
1.5 ms (typ.)
Read: 10.5 ms (typ.)
20.5 ms (typ.)
Start time 4.0 sec (typ.)
Interface Compliant with ATA-8 ACS AST, Serial ATA Revision 2.5
Gen1i and Gen2i
Data Transfer Rate (*3)
• To/From Media
• To/From Host
96.6 MB/s Max.
1.5 Gbps (150 MB/s) (Gen1i)
3.0 Gbps (300 MB/s) (Gen2i)
Data Buffer Size (*4) 8 MB (8,388,608 bytes)
Physical Dimensions
(Height × Width × Depth)
9.5 mm × 100.0 mm × 70.0 mm (*5)
Weight 116 g (Max.)
*1: Capacity under the LBA mode.
*2: One gigabyte (GB) = one billion bytes and One megabyte (MB) = one million bytes; accessible
capacity will be less and actual capacity depends on the operating environment and formatting.
*3: 1 GB is equal to 1,000,000,000 bytes and 1 MB is equal to 1,000,000 bytes.
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