Seagate Constellation.2 ST91000640NS 1TB 2.5" 7200 RPM 64MB Cache SATA 6GB/s Enterprise Class Internal HDD Hard Disk Drive 9RZ168-136.

Seagate Model Number: ST91000640NS
Seagate Part Number: 9RZ168-136
Dell Part Number: WF12F 0WF12F TH-0WF12F



 



Specifications:
 
Disk Family Constellation.2
Form Factor 2.5"
Capacity 1 TB (1 x 1 000 000 000 bytes)
Number Of Disks 4
Number Of Heads 8
Rotational Speed 7200 RPM
Rotation Time 8.33 ms
Average Rotational Latency 4.17 ms
Disk Interface Serial-ATA/600
Buffer-Host Max. Rate 600 MB/seconds
Buffer Size 65536 KB
Drive Ready Time (typical) 20 seconds
Average Seek Time 7.5 ms