Product comparison · 2 internal hard drives

Seagate Savvio ST1200MM0027-20PK internal hard drive vs Seagate Constellation ST9500621NS-20PK internal hard drive

Key differences

HDD capacity
- Savvio ST1200MM0027-20PK internal hard drive:1.2 TB
- Constellation ST9500621NS-20PK internal hard drive:500 GB
HDD speed
- Savvio ST1200MM0027-20PK internal hard drive:10000 RPM
- Constellation ST9500621NS-20PK internal hard drive:7200 RPM
HDD size
- Savvio ST1200MM0027-20PK internal hard drive:3.5"
- Constellation ST9500621NS-20PK internal hard drive:2.5"
Interface
- Savvio ST1200MM0027-20PK internal hard drive:SAS
- Constellation ST9500621NS-20PK internal hard drive:Serial ATA III
Average latency
- Savvio ST1200MM0027-20PK internal hard drive:2.9 ms
- Constellation ST9500621NS-20PK internal hard drive:4.16 ms
Power consumption (typical)
- Savvio ST1200MM0027-20PK internal hard drive:0.51 W
- Constellation ST9500621NS-20PK internal hard drive:4.51 W
Power consumption (idle)
- Savvio ST1200MM0027-20PK internal hard drive:4.6 W
- Constellation ST9500621NS-20PK internal hard drive:2.67 W
Operating voltage
- Savvio ST1200MM0027-20PK internal hard drive:5 / 12 V
- Constellation ST9500621NS-20PK internal hard drive:5 V

Differences highlightedShow differences only

Comparison of ST1200MM0027-20PK, ST9500621NS-20PK
28 specifications	A Seagate Savvio ST1200MM0027-20PK internal hard drive Model ST1200MM0027-20PK View product	B Seagate Constellation ST9500621NS-20PK internal hard drive Model ST9500621NS-20PK View product
Features5 differ
HDD capacityDiffers	1.2 TB	500 GB
HDD speedDiffers	10000 RPM	7200 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	SAS	Serial ATA III
Read seek timeKnown for one	Unknown — not stated by the source	8.5 ms
Write seek timeKnown for one	Unknown — not stated by the source	9.5 ms
Average latencyDiffers	2.9 ms	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	1400000 h
HDD number of cylindersKnown for one	4	Unknown — not stated by the source
HDD number of headsKnown for one	8	Unknown — not stated by the source
Power3 differ
Power consumption (typical)Differs	0.51 W	4.51 W
Power consumption (idle)Differs	4.6 W	2.67 W
Operating voltageDiffers	5 / 12 V	5 V
Operational conditions2 differ
Operating temperature (T-T)Differs	5 - 55 °C	5 - 60 °C
Operating shockDiffers	40 G	70 G
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Weight & dimensions1 differ
WeightDiffers	204 g	183 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.