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Roxor McOwnage

You can't get around just buying a fast drive to begin with, can y

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For big, cheap and reliable software RAID 5 seems to be the way to go, and it's what I use for a home fileserver. No real need for speed.

But at work my desktop typically runs a few VMWare images with Windows/Linux/Solaris x86 inside. I had a setup with 2 74GB Raptors, but for space and failure-recovery reasons swapped them out for 4x160GB RAID 10. After all, 4 drives must be better than 2, right?

Although I got the extra space and a warm-n-fuzzy feeling from the mirrored disks.... the striping and higher STR didn't help at all. In fact, things are noticably more sluggish now. I can only guess that since VMWare is really ramming an entire filesystem inside a large file on the underlying OS there must be some crazy seeking going on inside those big files? Or before where I put a couple VM's on each disk now they're all competing for the same array?

Anyways, I learned my lesson. The money would have been better spent on more (or larger) Raptors. And I thought I was being so clever and frugal... :)

Bah!

Live and learn...

Rox

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Here comes my two cents...

160GB drives today are very cheap, for the price of two raptors you could get 6 drives so I don't think that comparing 2 raptors with 4 160GB drives is that fair.

Provided that you have the ports available just add two or four drives and your problem will be solved.

I think that even though you went for the cheap option, 4x160GB shouldn't be that far off the raptors, in a system with several concurrent reads I would even expect it to beat the raptors. Since you feel that the system is considerably slower now, perhaps some test would be in place, maybe something is simply wrong.

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Hi Adde,

You're right: maybe the idea was good but I just didn't go far enough with it. 4 drives was convenient because of port and internal space issues: but 2 more drives may do the trick if I get a bigger case.

So far I'm just complaining about the "feel" of the system: if I do get a couple more drives I'll be sure to post some real benchmarks of my findings.

Regards,

Rox

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