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RAID 5: the right choice? (SOLVED)

post #1 of 8
Thread Starter 
Hi,

So I've set up my rig with 1 60GB SSD and 2 x 500GB HDD with the 2 HDD set up in RAID 0 and the SSD as an OS boot drive. I would quite like to back up my RAID array on an internal storage HDD. I am considering getting a 1tb HDD to use in a RAID 5 array with the other 2 x 500GB drives. Would this work? Or would the 1TB drive be read as 500GB (i.e. not providing the adequate capacity to back up the existing 2x 500GB)? Do you guys think this is the right solution to backing up my drives or should I just get an external and back up from the OS. There would be nothing I would like more than for it to all work automagically!
Edited by Tamo - 12/31/10 at 7:38pm
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John RIG
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post #2 of 8
With your current HDDs:

If you want redundency and read/write performance.... go with 4xRAID10. (1TB usable, survive 1 HDD failure.)
If you want redundency and read performance.... go with 4xRAID5. (1.5TB usable, survive 1 HDD failure.)
If you want read/write performance with back ups.... go with 2xRAID0 (1TB usable) and periodical backups to 2xRAID0
Edited by DuckieHo - 12/31/10 at 11:32am
Once again...
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Once again...
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post #3 of 8
The 1TB drive would be used as a 500GB drive.

If you're concerned about having a backup for the RAID0 setup, use a 1TB as a separate drive and occasionally write a backup of the 2x 500GB drives.
The Byte Mogul
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The Byte Mogul
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post #4 of 8
Recommended to use matching drives (manufacturer and model) in any RAID array.

If you toss a 1TB drive in an array with 500GB drives you will only be able to use 500GB of the 1TB drive.
At long last...
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At long last...
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post #5 of 8
If you want to change your RAID 0 with two 500GB to a RAID 5 just add another 500GB drive.

Or you could convert your RAID 0 and this 1TB drive to a dynamic disk and then make a windows mirror of your 1TB RAID 0 array to your 1TB drive.
RAID 5 extreme!
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RAID 5 extreme!
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post #6 of 8
Thread Starter 
Thanks guys. Looks like i'm going to have to set up a back up outside of my current RAID array!
Sorry for such a noobish question... but if i backup the two 500Gb hdd onto a separate 1tb hdd will the data be copied correctly (would it all be a bit weird due to the striped nature of the RAID array) or can i only backup onto another RAID 0 array? Can I partition a 1tb drive and use it as RAID 0 or would i have to buy two more 500GB hdd's? What is the best method for periodical backups?
John RIG
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John RIG
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post #7 of 8
The data from your RAID0 will copy correctly to a backup drive, and you can use a single 1TB drive.

The frequency of your backups depend on how critical the data is. Would a week's worth of changes to the data be detrimental to your work? How about bi-weekly, or even a month?

To make the backup process a little faster, rather than just make a direct copy from one drive to the other, only copy files that have been modified since the last backup.
The Byte Mogul
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The Byte Mogul
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post #8 of 8
Thread Starter 
OK, thanks very much, very useful information! I think bi-weekly would probably suffice! Looks like i'm going to have to keep my files uber organised! Thanks again, for all the responses. This forum is ace!
John RIG
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John RIG
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