On Fri, 27 Jun 2014 20:30:32 Zack Coffey wrote: > Can I get more protection by using more than 2 drives? > > I had an onboard RAID a few years back that would let me use RAID1 > across up to 4 drives.
Currently the only RAID level that fully works in BTRFS is RAID-1 with data on 2 disks. If you have 4 disks in the array then each block will be on 2 of the disks. RAID-5/6 code mostly works but the last report I read indicated that some situations for recovery and disk replacement didn't work - presumably anyone who's afraid of multiple disks failing isn't going to want to trust BTRFS RAID-6 code at the moment. If you want to have 4 disks in a fully redundant configuration (IE you could lose 3 disks without losing any data) then the thing to do is to have 2 RAID-1 arrays with Linux software RAID and then run BTRFS RAID-1 on top of that. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
