eMachines D720 - Manual (Page 28)

18 Chapter 1
Hard Disk Drive Interface
Item Specification
Vendor Seagate Momentus 5400.4 SATA
Model Name ST9250827AS ST9160827AS ST9120817AS
Capacity (MB) 250 160 120
Bytes per sector 512
Data heads 4 3 2
Drive Format
Disks 2 2 1
Spindle speed (RPM) 5,400
Performance Specifications
Buffer size 8MB
Interface SATA
Internal transfer rate (Mbits/
sec max)
778
Sustained transfer rate
(Mbytes/sec max)
58
I/O data transfer rate
(Mbytes/sec max)
300
DC Power Requirements
Voltage tolerance 5V(DC) +/- 5%
Item Specification
Vendor Seagate Momentus 5400.5 SATA
Model Name ST9320320AS ST9250320AS ST9160310AS ST9120310AS
Capacity (MB) 320 250 160 120
Bytes per sector 512
Data heads 4 4 or 3 2 2
Drive Format
Disks 2 or 1 2 1 1
Spindle speed (RPM) 5,400
Performance Specifications
Buffer size 8 MB
Interface SATA
Internal transfer rate
(Mbits/sec max) 352
I/O data transfer rate
(Mbytes/sec max) 150
DC Power Requirements
Voltage tolerance 5V(DC) +/- 5%