My choice would be RAID 6 for a file server since you can lose two drives and it does not matter which set of two can die. From what I understand with RAID 10 you can lose two drives but if they happen to be on the same RAID 1 array then you are a out of luck? Any suggestions? Basic file server with about 200GB of data and it would act as a single point of backup for other workstations and servers.
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It depends on what you are trying to do. While Raid 10 would give you faster reads and writes of the two, as you said, it is possible to lose everything if you lose the wrong two drives. But on larger disk arrays you could lose exactly half the drives and retain full operations. But with Raid 6, your writes could be a bit slower b/c of the extra checksum. But you could lose any two drives and not lose any data.
I think another important point to remember is that Raid is not data backup. So the main thing RAID should be looked at is server uptime. Not keeping data intact.
I think in the end it is a matter of preference. I would go with Raid 10 personally; For really large arrays you might be able to pull of a RAID 50 or 60. Where disk in the striped set could be protected with raid 5 or raid 6.
Some good reading:
3dinfluence : While RAID is not backup....in this case I think his definition of backup is sound. As the original data lives on workstations and other servers and is being backed up to this server. Which happens to use RAID to help aide in availability.pehrs : Let me add then: Online backup is not backup. If it is a backup it should be stored on tape/disks and put in a safe somewhere far away from the rest of the systems. RAID does not aid in that.From Insanity5902 -
For a workstation or a primarily CPU-intensive server, I'd vote for RAID 10 for the better read/write performance.
For a data storage server, I'd go with RAID 6.
If possible, I'd use the RAID 10 on my workstation and servers and use a RAID 6 on a file server to keep backup files.
From wag2639
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