Anyone running Dual 2.5" drives in raid in their iMac?

i7QuadCoreMania

macrumors 6502
Original poster
Nov 10, 2009
282
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There are a few dual 2.5" to 3.5" trays w/ raid 0 and 1 in the market recently.

Wondering if anyone has done this in their iMac, seeing that space is limited in the new machines, wondering which products if anyone has a working setup used.
 

zippyzoom

macrumors member
Sep 19, 2009
99
10
There are a few dual 2.5" to 3.5" trays w/ raid 0 and 1 in the market recently.

Wondering if anyone has done this in their iMac, seeing that space is limited in the new machines, wondering which products if anyone has a working setup used.
not i said the fly
 
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i7QuadCoreMania

macrumors 6502
Original poster
Nov 10, 2009
282
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Yes, I mean something like that. some of them say they support OSX

what I am concerned about is the front of the Enclosure seems longer than a normal 3.5" drive which might be too long to fit in the bay?

does anyone have something like that running?
 
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gianly1985

macrumors 6502a
May 30, 2008
798
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I think the imac will only "see" a NORMAL SINGLE hard disk, it will not be aware of the RAID happening inside the enclosure, so you shouldn't have any compatibility issue...it will be like plugging an ultra-fast SINGLE disk to your imac.....
 
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knewsom

macrumors 6502a
Jun 9, 2005
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I think the imac will only "see" a NORMAL SINGLE hard disk, it will not be aware of the RAID happening inside the enclosure, so you shouldn't have any compatibility issue...it will be like plugging an ultra-fast SINGLE disk to your imac.....
What if you have two disks in "regular" mode? Will it see them both? Like say, if one were to have an SSD in one slot and a regular laptop drive in the other slot?
 
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gianly1985

macrumors 6502a
May 30, 2008
798
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What if you have two disks in "regular" mode? Will it see them both? Like say, if one were to have an SSD in one slot and a regular laptop drive in the other slot?
I don't know..in that particular case ("regular mode"), the SATA interface of the iMac should have to support SATA multipliers.....so I think that, just for regular mode, it would be safe to look for other users' experiences before buying....

Instead for JBOD, RAID0 and RAID1 there shouldn't be compatibility issue...'cause the iMac would simply "see" a single drive...
 
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DarwinOSX

macrumors 68000
Nov 3, 2009
1,517
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Once you have had an SSD drive its very hard to go back to a regular hard drive and give up that speed.
 
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knewsom

macrumors 6502a
Jun 9, 2005
949
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Yeah, I'm sure - it's just a shame they're so TINY capacity wise, and MASSIVE, price-wise. A RAID-0 of two HDDs that are reasonably fast is quite quick, and big enough for most users.
 
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gianly1985

macrumors 6502a
May 30, 2008
798
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A RAID-0 of two HDDs that are reasonably fast is quite quick, and big enough for most users.
Are you sure that a RAID0 of 2,5" 7200rpm HDDs is so faster than a single 1-2tb 3,5" drive?
A RAID0 of SSDs makes sense 'cause they've small capacities (so at least you can double it using a single slot) and 'cause they are faster than a 3,5" HDD and get even faster in RAID0...

But a RAID of 2,5" HDDs in place of a single 3,5" HDD....I don't see the point, apart noise maybe....or making a RAID1...
 
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knewsom

macrumors 6502a
Jun 9, 2005
949
0
There's a new Seagate 2.5" drive that's pretty much as fast as a 3.25 - check the link I posted, one of the reviewers posted benchmarks. Uncached random reads of nearly 85 megs a second. In a RAID-0 that'd be as fast as a single SSD, maybe faster, and nice and big to boot.
 
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gianly1985

macrumors 6502a
May 30, 2008
798
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There's a new Seagate 2.5" drive that's pretty much as fast as a 3.25 - check the link I posted, one of the reviewers posted benchmarks. Uncached random reads of nearly 85 megs a second. In a RAID-0 that'd be as fast as a single SSD, maybe faster, and nice and big to boot.
No ;)

Not even 2 Velociraptor 10000rpm in RAID0 would be faster than a SSD in random writes/reads. (the most important parameters for determining the speed of the system)

 
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Sebastianmonty

macrumors newbie
Jul 3, 2008
19
0
There's a new Seagate 2.5" drive that's pretty much as fast as a 3.25 - check the link I posted, one of the reviewers posted benchmarks. Uncached random reads of nearly 85 megs a second. In a RAID-0 that'd be as fast as a single SSD, maybe faster, and nice and big to boot.
Honest mistake. Your link http://www.newegg.com/Product/Produ...Deals-_-na-_-na&AID=10521304&PID=3160356&SID=
shows a SCORE of 85.94. the baseline being 100. The speed is actually 0.61 MB/sec [4K blocks]
So although I would love to know what the speed would be in RAID 0 I am guessing it wouldn't even be 1MB/sec
 
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