Disk Speeds / Disk Performance


I'm trying to order afew 1u / 2u servers from Dell but the question i'm in need of help is the hard disk is a very important factor for these servers i need the best performance an speed on read.

writing to these disks isn't a important part just the read is. these servers are going to be hosting gaming servers so when the map changes on a server the quicker the hard disk is the quicker the map changes! Just to give you an idea.

now which would be quicker the setup of the server so far is
Intel Xeon 5400 2.8Ghz Quad Core

the disk options are:
Sata-II 15K RPM 500GB
Raid 0 + 2x Sata-II 7.2RPM
Raid 0 + 2x Sata-II 10K RPM
SCSI setup
SAS setup
Who is Participating?
Lee W, MVPConnect With a Mentor Technology and Business Process AdvisorCommented:
If you need fast reads, have you considered purchasing (separately if necessary) SSDs?  (Solid State Drives)?  They aren't THAT cheap but the 128 GB drives are getting somewhat reasonable in price (depending on how much space you actually need).

Otherwise, I would go with a RAID 10/0+1 for performance using the fastest disks you can find (15K RPM if SSDs are not an option).
TristanIT ManagerCommented:
Which model Poweredge is it?
rindiConnect With a Mentor Commented:
Use SCSI HD's and raid 5 if you only need fast reads and not writes. With raid 0 you have no redundancy, but have fast writes, while raid 5 gives you normal write speeds and fast reading speeds. SCSI HD's are still faster than other disks.
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andyalderConnect With a Mentor Commented:
15k SFF SAS. RAID 10 assuming the controller does load-balanced reads across both halves of a mirror. Short-stroke them by formatting to a capacity less than the total available space if you can.
if you aren't too worried about writes and more concerned with reads go for SAS 15k (SAS is almost as fast as FC) and RAID 5.

RAID 5 is not the best for writing (due to the parity calculation) but is good for reading as you can utilise all disk spindles (while in RAID 10 half aren't in use as they are mirrored).

RAID 5 will give you redundancy for one disk failure (parity bit sits on each HD in array)
You must have a pretty poor controller if it only uses half the disks during read, proper ones balance the reads over both disks in a mirror like I said before.
xP3000Author Commented:
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