10000 RPM vs 7200 RPM Drives

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bher20

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Jan 12, 2010
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Hello All,
I am going to be purchasing a set of hard drives and a raid card to move my virtual machines to and I am having a difficult time deciding on what speed drives to get.
I am running Hyper-V on Windows Server 2008 R2 and have about 6 or 7 vm's.
My question is would there be a noticeable boost in performance if I bought 4 Western Digital VelociRaptor WD1500HLFS 150GB 10000 RPM SATA 3.0Gb/s vs say 4 hitachi 7200 RPM drives in a Raid 5 on a HighPoint RocketRAID 4320 raid card?
I guess the biggest I/O hogs I am running on my vm box are an Exchange 2010 server and a small MySQL database for a website. My main concern is that the hitachi drives would be half the price of the 4 VelociRaptor drives, but the VelciRaptor's have a much better average seek time @ 4.2ms then the Hitachi's @ 8.5ms. Thanks for you help guys.

PS. This is a home lab type setup not an enterprise.

-Brad
 
At work we're running 4 15000RPM SAS drives to support our Hyper-V cluster. What is that speed and those quick access times doing for us? Absolutely nothing. In fact we're upgrading due to low disk space and going with 7200RPM SATA drives. Between my experience at work and my own lab I would say 7200 RPM drives will be just fine. Take the extra cash and get more memory or a couple extra hard drives.
 
Waypo said:
At work we're running 4 15000RPM SAS drives to support our Hyper-V cluster. What is that speed and those quick access times doing for us? Absolutely nothing. In fact we're upgrading due to low disk space and going with 7200RPM SATA drives. Between my experience at work and my own lab I would say 7200 RPM drives will be just fine. Take the extra cash and get more memory or a couple extra hard drives.
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Thanks for the quick reply, good to know!
Oh, forgot to add that they are currently on 4 Samsung 5400 RPM drives using the build in Windows Server software raid 5.
 
i wouldnt buy a HighPoint RocketRAID 4320, they have always been subar on performance, try an adaptec 3805 or other card from that series.
 
MrGuvernment said:
i wouldnt buy a HighPoint RocketRAID 4320, they have always been subar on performance, try an adaptec 3805 or other card from that series.
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I'm actually now thinking I will go with the areca ARC-1880i, since I will be using the HP SAS Expander and the thread in this forum says that it supports that card and it will do dual linking. Thanks.
 
@bher20: how many ports do you need? you might also consider the Intel RES2SV240 expander which is a bit newer than the HP and will negotiate SATA-III drives at 6G, unlike the HP which only negotiates SAS-2 drives at 6G.
 
odditory said:
@bher20: how many ports do you need? you might also consider the Intel RES2SV240 expander which is a bit newer than the HP and will negotiate SATA-III drives at 6G, unlike the HP which only negotiates SAS-2 drives at 6G.
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I didn't know about that card, thanks for the info. That's definatly worth concedering over the HP. That card should have enough ports for the time being; by the way the case I have the server in is the Norco RPC-4020.
 
Waypo said:
At work we're running 4 15000RPM SAS drives to support our Hyper-V cluster. What is that speed and those quick access times doing for us? Absolutely nothing. In fact we're upgrading due to low disk space and going with 7200RPM SATA drives. Between my experience at work and my own lab I would say 7200 RPM drives will be just fine. Take the extra cash and get more memory or a couple extra hard drives.
Click to expand...

How is your IOPS load at work?
 
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