Product comparison · 2 internal hard drives

Seagate Constellation ST91000642SS-20PK internal hard drive vs Seagate Savvio ST9300553SS-20PK internal hard drive

Key differences

HDD capacity
- Constellation ST91000642SS-20PK internal hard drive:1 TB
- Savvio ST9300553SS-20PK internal hard drive:300 GB
HDD speed
- Constellation ST91000642SS-20PK internal hard drive:7200 RPM
- Savvio ST9300553SS-20PK internal hard drive:15000 RPM
Read seek time
- Constellation ST91000642SS-20PK internal hard drive:8.5 ms
- Savvio ST9300553SS-20PK internal hard drive:2.6 ms
Write seek time
- Constellation ST91000642SS-20PK internal hard drive:9.5 ms
- Savvio ST9300553SS-20PK internal hard drive:3.1 ms
Average latency
- Constellation ST91000642SS-20PK internal hard drive:4.16 ms
- Savvio ST9300553SS-20PK internal hard drive:2 ms
Power consumption (typical)
- Constellation ST91000642SS-20PK internal hard drive:6.4 W
- Savvio ST9300553SS-20PK internal hard drive:7.92 W
Power consumption (idle)
- Constellation ST91000642SS-20PK internal hard drive:3.85 W
- Savvio ST9300553SS-20PK internal hard drive:4.23 W
Operating temperature (T-T)
- Constellation ST91000642SS-20PK internal hard drive:5 - 60 °C
- Savvio ST9300553SS-20PK internal hard drive:5 - 55 °C

Differences highlightedShow differences only

Comparison of ST91000642SS-20PK, ST9300553SS-20PK
28 specifications	A Seagate Constellation ST91000642SS-20PK internal hard drive Model ST91000642SS-20PK View product	B Seagate Savvio ST9300553SS-20PK internal hard drive Model ST9300553SS-20PK View product
Features5 differ
HDD capacityDiffers	1 TB	300 GB
HDD speedDiffers	7200 RPM	15000 RPM
HDD number of cylindersKnown for one	Unknown — not stated by the source	2
HDD number of headsKnown for one	Unknown — not stated by the source	4
Read seek timeDiffers	8.5 ms	2.6 ms
Write seek timeDiffers	9.5 ms	3.1 ms
Average latencyDiffers	4.16 ms	2 ms
Bytes per sectorKnown for one	512	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	1400000 h	Unknown — not stated by the source
Power2 differ
Power consumption (typical)Differs	6.4 W	7.92 W
Power consumption (idle)Differs	3.85 W	4.23 W
Operational conditions4 differ
Operating temperature (T-T)Differs	5 - 60 °C	5 - 55 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	-40 - 70 °C
Non-operating vibrationDiffers	3 G	2.4 G
Operating shockDiffers	70 G	60 G
Non-operating shockDiffers	400 G	300 G

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.