money11465

First, if this is more appropriate in off-topic, then please move it there. I thought it would be good in this section.
I was thinking of a new technology (maybe it exists IDK) where an HDD has four platters and the data is striped onto these platters, so it would be like RAID0, except in a single drive. Istead of arrangung the data sequentially so that only one platter is being read from, all platters are being read from (or written to) at the same time. That would be fast! Comments, please? (Does anyone else understand what I mean?)

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LiNERROR

what people know of hard drives is rather oversimplified... manufacturers have been trying to squeeze every drop of performance out of HDDs since their creation... but to do this would both drive up production costs, and failure rate...

more platters + more heads = greater chance of failure...

and the fastest drive on the market right now only has 1 platter...

it would be nice to have a drive n times the performance of a normal desktop drive... but they already exist... and are for sale today...

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LiNERROR
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money11465

I know there is a greater chance of failure, that comes with RAID0. So this is a drive for people who would want RAID0 anyway, but might not have a motherboard capable of doing so.

Really? I'd like to see this single-plattered drive.

Really? Can you show me "a drive n times the performance of a normal desktop drive..."?

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DuckieHo

Not economically possible. HDs require a very powerful and precise motors. To drive platters at different speeds would require an individual motor to each one. Or build some type of mechanical gear system to adjust the speed of each platter. Then there's the problem of connect the spindle to each platter separately. All that added complexity would drive up costs and increase MTBF. In addition, you lose the entire drive if either platter/motor/gear system failed. In a two HD RAID, you can at least salvage one of the stripe drives... usually.

Besides, RAID was originally implement for server or high critical enviroments. It continues to be as 99% of RAID implementation are on servers. Servers require high reliability and low down time.

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AARDVARCUS

I understand what your talking about money, but when you striped the files, say the stripe was 64kb, it would have to use 64kb on EACH platter, regardless. But if someone wanted extreme performance without needing lots of storage, it would be a good idea.

DuckieHo

That's not true... you maybe thinking of mirroring. If I have a 64KB file on a 64KB stripe 2xHD RAID0, the data would be written to only the first disk. If I have 140KB file, the controller would write 64K on first drive, 64K on second drive, and then 12KB on the first drive again. However, the 12KB block would still take up an entire 64KB block only on the first drive.

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money11465

The platters would spin at the same rate, but there would be one independently-controlled read head for each platter. This would certainly increase latencies over a regular RAID0 array, but it would still be nice compared to a single drive. It would kind of be like a 7950GX2, two cards in SLI mode in one package.

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