Product comparison · 2 internal hard drives

Seagate Constellation ST91000641NS-20PK internal hard drive vs Seagate Savvio ST9300553SS-20PK internal hard drive

23specifications compared
12differ
11identical
5known for one product only

Key differences

The Seagate Savvio ST9300553SS-20PK internal hard drive has 7,800 RPM more HDD speed than the Seagate Constellation ST91000641NS-20PK internal hard drive (15000 RPM vs 7200 RPM). The Seagate Constellation ST91000641NS-20PK internal hard drive has 5.9 ms more read seek time than the Seagate Savvio ST9300553SS-20PK internal hard drive (8.5 ms vs 2.6 ms). The Seagate Constellation ST91000641NS-20PK internal hard drive has 6.4 ms more write seek time than the Seagate Savvio ST9300553SS-20PK internal hard drive (9.5 ms vs 3.1 ms). HDD capacity: 1 TB on the Seagate Constellation ST91000641NS-20PK internal hard drive, 300 GB on the Seagate Savvio ST9300553SS-20PK internal hard drive. Interface: Serial ATA III on the Seagate Constellation ST91000641NS-20PK internal hard drive, SAS on the Seagate Savvio ST9300553SS-20PK internal hard drive.

HDD capacity
- Constellation ST91000641NS-20PK internal hard drive:1 TB
- Savvio ST9300553SS-20PK internal hard drive:300 GB
HDD speed
- Constellation ST91000641NS-20PK internal hard drive:7200 RPM
- Savvio ST9300553SS-20PK internal hard drive:15000 RPM
Interface
- Constellation ST91000641NS-20PK internal hard drive:Serial ATA III
- Savvio ST9300553SS-20PK internal hard drive:SAS
Read seek time
- Constellation ST91000641NS-20PK internal hard drive:8.5 ms
- Savvio ST9300553SS-20PK internal hard drive:2.6 ms
Write seek time
- Constellation ST91000641NS-20PK internal hard drive:9.5 ms
- Savvio ST9300553SS-20PK internal hard drive:3.1 ms
Average latency
- Constellation ST91000641NS-20PK internal hard drive:4.16 ms
- Savvio ST9300553SS-20PK internal hard drive:2 ms
Power consumption (typical)
- Constellation ST91000641NS-20PK internal hard drive:5.21 W
- Savvio ST9300553SS-20PK internal hard drive:7.92 W
Power consumption (idle)
- Constellation ST91000641NS-20PK internal hard drive:3.31 W
- Savvio ST9300553SS-20PK internal hard drive:4.23 W

Side by side

Differences highlightedShow differences only

Comparison of ST91000641NS-20PK, ST9300553SS-20PK
28 specifications	A Seagate Constellation ST91000641NS-20PK internal hard drive Model ST91000641NS-20PK View product	B Seagate Savvio ST9300553SS-20PK internal hard drive Model ST9300553SS-20PK View product
Features6 differ
HDD capacityDiffers	1 TB	300 GB
HDD speedDiffers	7200 RPM	15000 RPM
InterfaceDiffers	Serial ATA III	SAS
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	5.21 W	7.92 W
Power consumption (idle)Differs	3.31 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.

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