On 06/16/2014 12:14 PM, Nuno Magalhães wrote: > Thanks for the tips. > Back to a previous question (assuming i have the drives sorted out first): > > If i create a RAID10 with 3 1TB drives, with --layout=f2, would this > give me 2TB of space +1TB redundancy? Is this a 1E? > Using: mdadm --create /dev/md0 --verbose --chunk=128 --level=10 > --layout=f2 --raid-devices=3 /dev/sd[abd]1 No, you'll have 1.5T of available space mirrored by halves. > If so, what would be the difference to a RAID5: > mdadm --create /dev/md0 --verbose --chunk=512 --level=5 > --raid-devices=3 /dev/sd[abd]1 > > Besides one having redundancy and the other having parity; and that > RAID5 must compute parity (is that really so horrendously slow > nowadays?). You can't fit the redundancy for 2T of data into 1T without some form of parity raid. > Other than tiobench, any other benchmarking tools you guys recommend? > (I've decided to just go slow and test every layer out before moving > to the next, i.e. 1st RAID, LVM, FSs, Xen, apps.) I'll leave that one for others. . . Just don't expect dd to be very useful. Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
