16 Chapter 1
Hard Disk Drive Interface
Hard Disk Drive Interface (continued)
Item Specifications
Vendor & Model Name
Hitachi
HDT721016SLxxx
HCT721016SLxxx
HDT721025SLxxx
HCT721025SLxxx
HDT721032SLxxx
HCT721032SLxxx
Hitachi
HDT721050SLxxx
HCT721050SLxxx
HDE721050SLxxx
Hitachi
HDT721064SLxxx
HCT721064SLxxx
HDE721064SLxxx
HDT721075SLxxx
HCT721075SLxxx
HDE721075SLxxx
Hitachi
HDT721010SLxxx
HCT721010SLxxx
HDE721010SLxxx
Capacity (GB) 160, 160, 250,
250, 320, 320 500 640, 640, 640,
750, 750, 750, 1000
Bytes per sector 512
Data heads 1, 1, 2, 2, 2, 2 3 6 6
Drive Format
Disks 1223
Spindle speed (RPM) 7200
Performance Specifications
Buffer size 8MB 8MB 16 32
Interface SATA
Internal transfer rate (MB/
sec, max)
300MB/s maximum
I/O data transfer rate
(Mbytes/sec max)
1406 Mbits/s maximum
DC Power Requirements
Voltage +5.0V ± 5%.
Item Specifications
Vendor & Model Name
Seagate ST31000528AS,
ST3750528AS,
ST3500418AS,
ST3500410AS,
ST3320418AS
(Pharaoh)
Seagate ST3250318AS,
ST3160318AS
(Pharaoh)
Seagate ST9100822A,
ST9808210A, ST960821A,
ST950212A, ST9402113A,
ST930219A
(Momentus)
Capacity (GB) 1000, 750 250, 160 100, 80, 60, 50, 40, 30
Bytes per sector 512 512 512
Data heads 4 1 4, 3, 3, 2, 2, 2
Drive Format
Disks 2, 2, 1, 1, 1 1 2, 2, 2, 1, 1, 1,
Spindle speed (RPM) 7200 5400
Performance Specifications
Buffer size 32MB, 32MB, 16MB,
16MB, 16MB 8MB 8MB, 8MB, 8MB, 2MB,
2MB, 2MB
Interface SATA
Internal transfer rate
(MB/sec, max)
300MB/s maximum
I/O data transfer rate
(Mbytes/sec max)
300
DC Power Requirements
Voltage 5V +10% / -7.5% -.12V +10% / -7.5%