Dear all,
i need few tips about Ceph best solution for driver controller.
I'm getting confused about IT mode, RAID and JBoD.
I read many posts about don't go for RAID but use instead a JBoD
configuration.
I have 2 storage alternatives right now in my mind:
*SuperStorage Server 2027R-E1CR24L*
which use SAS3 via LSI 3008 AOC; IT Mode/Pass-through
http://www.supermicro.nl/products/system/2U/2027/SSG-2027R-E1CR24L.cfm
and
*SuperStorage Server 2027R-E1CR24N*
which use SAS3 via LSI 3108 SAS3 AOC (in RAID mode?)
http://www.supermicro.nl/products/system/2U/2027/SSG-2027R-E1CR24N.cfm
Ok both of them solution should support JBoD.
However I read that only a LSI with HBA or/and flashed in IT MODE allow to:
* "plug&play" a new driver and see it already on a linux distribution
(without recheck disks)
* see S.M.A.R.T. data (because there is no volume layer between
motherboard and disks)
* reduce the disk latency
Then i should probably avoid LSI 3108 (which have a RAID config by
default) and go for the LSI 3008 (already flashed in IT mode).
Is it so or I'm completly wasting my time on useless specs?
Did I getting the point? What would you reccomend?
I'm getting dumb reading by myself tons of specs without any second
human opinion.
Thanks you for any hint you'll give!
--
*Massimiliano Cuttini*
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