Product comparison · 2 internal hard drives

Seagate Savvio ST900MM0036-20PK internal hard drive vs Seagate Constellation ST9500621NS-20PK internal hard drive

22specifications compared
11differ
11identical
6known for one product only

Key differences

The Seagate Savvio ST900MM0036-20PK internal hard drive has 400 GB more HDD capacity than the Seagate Constellation ST9500621NS-20PK internal hard drive (900 GB vs 500 GB). The Seagate Savvio ST900MM0036-20PK internal hard drive has 2,800 RPM more HDD speed than the Seagate Constellation ST9500621NS-20PK internal hard drive (10000 RPM vs 7200 RPM). The Seagate Savvio ST900MM0036-20PK internal hard drive has 1" more HDD size than the Seagate Constellation ST9500621NS-20PK internal hard drive (3.5" vs 2.5"). Interface: SAS on the Seagate Savvio ST900MM0036-20PK internal hard drive, Serial ATA III on the Seagate Constellation ST9500621NS-20PK internal hard drive. Operating voltage: 5 / 12 V on the Seagate Savvio ST900MM0036-20PK internal hard drive, 5 V on the Seagate Constellation ST9500621NS-20PK internal hard drive.

HDD capacity
- Savvio ST900MM0036-20PK internal hard drive:900 GB
- Constellation ST9500621NS-20PK internal hard drive:500 GB
HDD speed
- Savvio ST900MM0036-20PK internal hard drive:10000 RPM
- Constellation ST9500621NS-20PK internal hard drive:7200 RPM
HDD size
- Savvio ST900MM0036-20PK internal hard drive:3.5"
- Constellation ST9500621NS-20PK internal hard drive:2.5"
Interface
- Savvio ST900MM0036-20PK internal hard drive:SAS
- Constellation ST9500621NS-20PK internal hard drive:Serial ATA III
Average latency
- Savvio ST900MM0036-20PK internal hard drive:2.9 ms
- Constellation ST9500621NS-20PK internal hard drive:4.16 ms
Power consumption (typical)
- Savvio ST900MM0036-20PK internal hard drive:0.49 W
- Constellation ST9500621NS-20PK internal hard drive:4.51 W
Power consumption (idle)
- Savvio ST900MM0036-20PK internal hard drive:3.9 W
- Constellation ST9500621NS-20PK internal hard drive:2.67 W
Operating voltage
- Savvio ST900MM0036-20PK internal hard drive:5 / 12 V
- Constellation ST9500621NS-20PK internal hard drive:5 V

Side by side

Differences highlightedShow differences only

Comparison of ST900MM0036-20PK, ST9500621NS-20PK
28 specifications	A Seagate Savvio ST900MM0036-20PK internal hard drive Model ST900MM0036-20PK View product	B Seagate Constellation ST9500621NS-20PK internal hard drive Model ST9500621NS-20PK View product
Features5 differ
HDD capacityDiffers	900 GB	500 GB
HDD speedDiffers	10000 RPM	7200 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	SAS	Serial ATA III
Type	HDD	HDD
Storage drive buffer size	64 MB	64 MB
HDD number of cylindersKnown for one	3	Unknown — not stated by the source
HDD number of headsKnown for one	6	Unknown — not stated by the source
Average latencyDiffers	2.9 ms	4.16 ms
Bytes per sector	512	512
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
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	1400000 h
Power3 differ
Power consumption (typical)Differs	0.49 W	4.51 W
Power consumption (idle)Differs	3.9 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
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Operating vibration	0.5 G	0.5 G
Non-operating vibration	3 G	3 G
Operating shockDiffers	40 G	70 G
Non-operating shock	400 G	400 G
Weight & dimensions1 differ
Width	70.1 mm	70.1 mm
Depth	100.5 mm	100.5 mm
Height	15 mm	15 mm
WeightDiffers	212 g	183 g
Packaging dataidentical
Quantity per pack	20 pc(s)	20 pc(s)
Other featuresidentical
Data transfer rate	6 Gbit/s	6 Gbit/s

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.

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