RAID 5 to RAID 10 via RAID 0?

[Luke_85]

Hi everyone,

I have a RAID5 (5x 2TB HDDs) and I am looking to go away from this set up to a RAID10 using 6x 4Tb HDDs. My questions is this;

Q- is it possible to use my current 3x spare SATA connections to create my striped RAID and then add the mirror after... WITHOUT have to move my data except to remove it from the RAID5 and onto the RAID0?? as i only have an 8 way RAID card and moving 7TB onto all my spare 250s/500s and back onto the new RAID10 will take a looooooong time.
RAID card is LSI MegaRAID SAS MR9240-8i.

My current knowledge tells me i will need to rebuild the array between the RAID0 and RAID10 steps and therefor lose anything i have on them.

 

[FireWire2]

What wrong with your raid 5? LSI MegaRAID SAS MR9240-8i is a very decent raid card

 

[popatim]

That would work but since you should have a backup before you begin it would be much faster to just reinstall the backup to the new raid10.

Oh btw, I think you will need 1 more 4tb drive. Raid migration needs a spare drive to use as temp space. You can make it the hot spare drive after all is said and done.

 

[SoNic67]

Using 6 of 4TB in RAID 10 is a receipt for disaster. If one fails you will loose everything. You will have increased the failure rate three times compared to a single drive.
I would definitely go to RAID 50 with six drives (or eight) - your card supports it. And I think that you can migrate from RAID 5 directly (at least theoretically, not very familiar with that LSI SAS).
http://www.techrepublic.com/blog/the-enterprise-cloud/raid-50-offers-a-balance-of-performance-storage-capacity-and-data-integrity/