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Any problems with 2.5" drives vs 3.5" drives?

post #1 of 10
Thread Starter 
I'm using a Lian Li EX-553B in my Lian Li PC-A05N currently with a 3.5" drive for date storage. Thinking about it, I'm wondering about replacing it with two 2.5" drives (in raid 0) instead (it has the mounting options) for my OS.

The small drive will allow more room (read air flow) between the slim OD & the HD's (the OD basically rests right on top of the 3.5").

So, the long and short of it, will I see much drop from a desktop WD black to a laptop WD black (looking at the WD3200BEKT 320GB 7200 RPM 16MB Cache).

Thoughts?
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post #2 of 10
Laptop drives are quite a bit slower than 3.5" drives. Raid 0 will definitively make up for the difference and probably give you about 20-30% faster vs 3.5" drive.

However, you are increasing the risk of data lost by a factor of 2.

Personally I wouldn't go for it. You'd be spending a lot of money for a 20% performance increase and twice the possibility of data loss.
    
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post #3 of 10
Thread Starter 
Quote:
Originally Posted by Turnoz;11942650 
Laptop drives are quite a bit slower than 3.5" drives. Raid 0 will definitively make up for the difference and probably give you about 20-30% faster vs 3.5" drive.

However, you are increasing the risk of data lost by a factor of 2.

Personally I wouldn't go for it. You'd be spending a lot of money for a 20% performance increase and twice the possibility of data loss.

I'm already running two 640GB blacks in RAID 0 - which I'd likely turn into photo storage. But Thanks for the warning.

Just out of curiosity, I know there's less cache on the drive, but the spin is just as fast. Not sure about SATA read/write performance I guess.

And in case anyone needs it, here's the drive bay I was talking about:
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=27610
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post #4 of 10
Thread Starter 
Any more thoughts?
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post #5 of 10
cache on the drive is irrelevant. Ignore it.

The problem is that the laptop drives have smaller platters, so they need to seek more often (less data per track) and the sequential read speeds are slower (lower track diameter gives lower linear velocity, and hence lower max speeds).

Now it's worth pointing out that performance drives such as Velociraptors also use 2.5" platters - but the higher rotational speeds make up for the problems above.

It just isn't worth it for the performance increase - as RAID0 doesn't speed up all operations (seek times mainly), and the seek times are what suffers, you will almost certainly end up with worse performance for most tasks.
post #6 of 10
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post #7 of 10
Check some benchmarks for the Scorpio Black here on StorageReview. They are pretty good and run at 7200RPM. I assume they are dual platter rather than single platter, but they seem to do ok. Two in RAID 0 should be nice. smile.gif
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post #8 of 10
There might be a significant cost difference. Other than that, you're fine to use 2.5 instead of 3.5
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post #9 of 10
Don't put your photos on a RAID 0 array, unless you are trying to get rid of them.
post #10 of 10
Quote:
Originally Posted by SpeedNuggeT;11963609 
Don't put your photos on a RAID 0 array, unless you are trying to get rid of them.

this

this is why i have my sisters photography business stuff stored on a sans digital raid box in raid 1.

2x 2tb WD green drives work great for storage.
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