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1. Re: SAS drives on RAID5
Harm Millaard Mar 22, 2011 5:35 AM (in response to nathapushpa)What is the specific reason to use three disks in a raid5 and a separate disk? Why not a four disk raid5?
Assuming a single disk has a sustained transfer rate of 120 MB/s, your raid5 will deliver - depending on your raid controller - around 200 MB/s. However if you were to use a four disk raid5, that would increase to around 300 MB/s.
Currently your fastest disk is the raid5, so from a performance POV that would be the ideal disk to store your page file, previews and media cache files on, but from a storage efficiency POV, the single disk would be more attractive.
My initial reaction, without knowing your arguments for the 3 + 1 configuration, would be to use a four disk raid5 array and store everything, page file, previews and media cache next to your project and media on the same array. Easy to configure and maintain.
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2. Re: SAS drives on RAID5
JaysonM-Y Mar 22, 2011 5:59 AM (in response to Harm Millaard)It sounds like OP is using the 3 disk raid5 as his OS as well.
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3. Re: SAS drives on RAID5
Bill Gehrke Mar 23, 2011 1:30 PM (in response to JaysonM-Y)Well he should then be using the one drive for his C: drive and the three drive RAID 5 as the project disk rather than bass ackward.




