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SEAGATE PIPELINE HD 500GB
Pipeline HD Pro 1TB on the left, Pipeline HD 500GB on the right. The
500GB Pipeline has a shorter circuit board and the casing has less girth,
looking "hollowed out."
| Seagate Pipeline HD ST3500321CS: Key Features &
(from Seagate's product
| FEATURE & BRIEF
|| Our Comment
|Eco-friendly and best-in-class power savings
enabling the most energy-efficient system designs
||How eco-friendly the drive is is beyond
our scope. We'll take them to task on power consumption though.
|Industry-leading reliability in an always-on
environment supports longevity of consumer electronics and low-power applications.
||We'll have to take their word for it.
|Designed for cool, quiet, worry-free, 24x7
||"Designed for hot, loud, worrisome,
occasional operation" probably wouldn't be the best thing to say.
|Performance enhanced for multimedia streaming
|Seagate SoftSonic motor technology
enables years of ultraquiet, worry-free operation with acoustics performance
as low as 1.9 bels.
||The 1TB Pipeline was surprisingly quiet.
The 500GB model with its lower rotational speed should improve on that further.
|Up to 1-TB capacity enabling up to 200 hours
of HD storage or 1000 hours of SD television recording.
||1TB is nothing to brag about any more.
|Sweet-spot capacities enable premium television
services such as video on demand, high-definition storage and multi-room
streaming for DVRs and media centers.
||Only the 1TB model is really in a sweet-spot
based on price per gigabyte.
|Seagate Think Green sustainability
goes beyond green with improved reliability, low power consumption, leading
recycling programs, RoHS compliance, PVC free, halogen free and brominated
flame retardant free
||OK, we get it: Green is definitely the message.
Specifications: Caviar Green 2TB & Pipeline HD 500GB
| Disks / Heads
||4 / 8
||2 / 4
| Spindle Rotation Speed
|Sustained Data Rate OD
| Average Latency
| Power Requirements: Idle / Seek
||3.7W / 6.0W
||4.3W / 5.0W
||24 / 25 / 29 dBA (idle / quiet seek / performance
||2.1 / 2.4 bels (idle / operating)
Both manufacturers are
reluctant to state rotational speeds for their respective "green"
hard drives, not wanting consumers to get the (correct) impression that they
do not perform as well as typical 7200 RPM models. Western Digital uses the marketingspeak of "IntelliPower" which suggests that each individual
drive is set to an optimal speed between 5400 and 7200 RPM before leaving the
factory. An amazing coincidence that our 2TB turned out to be a 5400 RPM drive
just like our 1TB and 750GB samples. Seagate's current data sheet does not list
rotational speed at all, though an earlier version showed the smaller Pipelines (160GB,
320GB and 500GB models) all spin at 5900 RPM.
Other than the slight rotational speed advantage of the Pipelines, most of the published specifications favor
the 2TB Green drive as it has double the areal density (500GB vs. 250GB),
more cache and a higher sustained data rate. Both drives claim to be low power. The acoustics claims are difficult to compare, as WD cites dBA (we presume at 1m distance) sound pressure level, while Seagate cites bels sound power. Never mind, we measured them side by side in our own anechoic chamber.
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