Server hard drive speeds - Is faster better?

SSD for the "data", aka the SQL DB. Spinning 10k for the OS in RAID 1 is fine.

Paksher_Help_Desk wrote:We can find less expensive drives on Amazon for the RAID 10, but they are 15K, not 10K. Is there any reason why I wouldn't want to buy the faster speed drives? Do we need the slower speed drives for the RAID 10 drives? What's the logic between the two different speeds when combining RAIDs? What about solid state drives? Is anyone using these in servers at this time?
Make sure you are looking at Enterprise drives - that's one of the big reasons for price differences. Consumer grade drives are cheaper for a reason.
No, you don't need slower or faster for RAID10 - it's your choice. The logic they were using - RAID 10 combines 4 drives for your total IOPS while RAID 1 only has two. The combined 4 will be faster, even though the individual drives are slower, so they were trying to save you some money.
SSD is absolutely...

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