Product comparison · 2 internal hard drives

Seagate Constellation ST91000642SS-RF internal hard drive vs Seagate Savvio ST9450404SS-RF internal hard drive

20specifications compared
14differ
6identical
15known for one product only

Key differences

The Seagate Savvio ST9450404SS-RF internal hard drive has 2,800 RPM more HDD speed than the Seagate Constellation ST91000642SS-RF internal hard drive (10000 RPM vs 7200 RPM). The Seagate Constellation ST91000642SS-RF internal hard drive has 48 MB more storage drive buffer size than the Seagate Savvio ST9450404SS-RF internal hard drive (64 MB vs 16 MB). The Seagate Constellation ST91000642SS-RF internal hard drive has 5 more HDD heads than the Seagate Savvio ST9450404SS-RF internal hard drive (8 vs 3). HDD capacity: 1 TB on the Seagate Constellation ST91000642SS-RF internal hard drive, 450 GB on the Seagate Savvio ST9450404SS-RF internal hard drive. Operating temperature (T-T): 5 - 60 °C on the Seagate Constellation ST91000642SS-RF internal hard drive, 5 - 55 °C on the Seagate Savvio ST9450404SS-RF internal hard drive.

HDD capacity
- Constellation ST91000642SS-RF internal hard drive:1 TB
- Savvio ST9450404SS-RF internal hard drive:450 GB
HDD speed
- Constellation ST91000642SS-RF internal hard drive:7200 RPM
- Savvio ST9450404SS-RF internal hard drive:10000 RPM
Storage drive buffer size
- Constellation ST91000642SS-RF internal hard drive:64 MB
- Savvio ST9450404SS-RF internal hard drive:16 MB
HDD number of heads
- Constellation ST91000642SS-RF internal hard drive:8
- Savvio ST9450404SS-RF internal hard drive:3
Read seek time
- Constellation ST91000642SS-RF internal hard drive:7.5 ms
- Savvio ST9450404SS-RF internal hard drive:4.08 ms
Write seek time
- Constellation ST91000642SS-RF internal hard drive:8.5 ms
- Savvio ST9450404SS-RF internal hard drive:4.65 ms
Average latency
- Constellation ST91000642SS-RF internal hard drive:4.16 ms
- Savvio ST9450404SS-RF internal hard drive:3 ms
Operating temperature (T-T)
- Constellation ST91000642SS-RF internal hard drive:5 - 60 °C
- Savvio ST9450404SS-RF internal hard drive:5 - 55 °C

Side by side

Differences highlightedShow differences only

Comparison of ST91000642SS-RF, ST9450404SS-RF
35 specifications	A Seagate Constellation ST91000642SS-RF internal hard drive Model ST91000642SS-RF View product	B Seagate Savvio ST9450404SS-RF internal hard drive Model ST9450404SS-RF View product
Features7 differ
HDD capacityDiffers	1 TB	450 GB
HDD speedDiffers	7200 RPM	10000 RPM
HDD size	2.5"	2.5"
Interface	SAS	SAS
Type	HDD	HDD
Storage drive buffer sizeDiffers	64 MB	16 MB
HDD number of headsDiffers	8	3
Read seek timeDiffers	7.5 ms	4.08 ms
Write seek timeDiffers	8.5 ms	4.65 ms
Average latencyDiffers	4.16 ms	3 ms
Bytes per sectorKnown for one	512	Unknown — not stated by the source
Refurbished	Yes	Yes
Mean time between failures (MTBF)Known for one	1400000 h	Unknown — not stated by the source
Poweridentical
Power consumption (typical)Known for one	6.35 W	Unknown — not stated by the source
Operating voltageKnown for one	5 V	Unknown — not stated by the source
Start-up currentKnown for one	2 A	Unknown — not stated by the source
Operational conditions2 differ
Operating temperature (T-T)Differs	5 - 60 °C	5 - 55 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Operating vibrationKnown for one	0.5 G	Unknown — not stated by the source
Non-operating vibrationKnown for one	3 G	Unknown — not stated by the source
Operating altitudeKnown for one	-60.96 - 3048 m	Unknown — not stated by the source
Non-operating altitudeKnown for one	-60.96 - 12192 m	Unknown — not stated by the source
Operating shockDiffers	70 G	40 G
Non-operating shockKnown for one	400 G	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	69.8 mm	70 mm
DepthDiffers	100 mm	100.2 mm
HeightDiffers	15 mm	14.8 mm
WeightDiffers	200 g	208 g
Other features1 differ
Data transfer rateDiffers	4.69 Gbit/s	6 Gbit/s
Internal	Yes	Yes
Plug and PlayKnown for one	Yes	Unknown — not stated by the source
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	70 x 100.2 x 14.8 mm
Disks included quantityKnown for one	Unknown — not stated by the source	3 pc(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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