The Wikipedia article about drobo explains a bit about their disk layout. Also what about using raid 6 instead of 5? I think I read claims that it's not only more resilient nut could also be faster. On Feb 23, 2012 12:44 AM, "Ira Abramov" <[email protected]> wrote:
> Hey people, > > A friend of mine want to build a file server machine at home to get the > benefits of a Drobo, but for 1500 NIS rather than $1500. > > The idea is to mix in 1T, 2T and 3T disks he already has, and on > occasion grow the ׁ•torage by another disk or replace and rebalance it. > He wants it to be more reliable than RAID0 but more efficient than > RAID10, so RAID 5/6 are more like it. > > I looked around at the idea of ZFS or a distributed FS on a single node, > but they are not options. I'm thinking how to do it with a block > redundancy scheme, and so far I came up with this: create a RAID5 from > the lower 1TB of all the disks you have, then a smaller RAID5 array from > the second TB, and finally a RAID1 or RAID5 from whatever you have left. > > so if we say I have 2*3T and 2*2T and 1*1T, I have (5-1)*1T+(4-1)*1T+1T > (the last is RAID1). now I have 8TB in three block devices, and I make a > single LV (LVM2) from three extents. > > Is there a better solution? do note that it's not optimal for spindle > activity, but this is a home machine serving two other computers and a TV > streamer at the worst case. > > Any feedback is welcome... > > -- > Perishable item > Ira Abramov > http://ira.abramov.org/email/ > > _______________________________________________ > Linux-il mailing list > [email protected] > http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >
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