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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)
MHW2120BS MHW2100BS MHW2080BS MHW2060BS MHW2040BS
Format Capacity (*1, *2) 120 GB 100 GB 80 GB 60 GB 40 GB
Number of Sectors (User) 234,441,648 195,371,568 156,301,488 117,210,240 78,140,160
Bytes per Sector 512 bytes
Rotational Speed 5,400 rpm ± 1%
Average Latency 5.56 ms
Positioning time (read and seek)
• Minimum (Track-Track)
• Average
• Maximum (Full)
1.5 ms (typ.)
Read: 12 ms (typ.)
22 ms (typ.)
Start time 4.0 sec (typ.)
Interface Compliant with ATA/ATAPI-8, SATA I High Speed Serialized AT
Attachment 1.0a, SATA II Ext to SATA1.0a,
SATA II Electrical Spec.1.0
Data Transfer Rate (*2)
• To/From Media
• To/From Host
61.3MB/s Max.
1.5 Gbps (150 MB/s)
Data Buffer Size (*3) 8 MB (8,388,608 bytes)
Physical Dimensions
(Height × Width × Depth)
9.5 mm × 100.0 mm × 70.0 mm (*4)
Weight 101 g (Max.)
*1: Capacity under the LBA mode.
*2: 1 GB is equal to 1,000,000,000 bytes and 1 MB is equal to 1,000,000 bytes.
*3: 1 MB is equal to 1,048,576 bytes.
*4: The value of Depth (=100.0 mm) does not include PCBA (Printed Circuit Board Assembly).
For details, see Section 3.1.
Table 1.1 lists the formatted capacity, number of logical cylinders, number of
heads, and number of sectors of every model for which the CHS mode has been
selected using the BIOS setup utility on the host.
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