On Saturday 11 December 2010 23:50 Jerry Franz wrote > On 12/11/2010 09:24 AM, Rainer Duffner wrote: > > With 100TB, DIY is out of the question ;-) > > I wouldn't say that. It would be...challenging...but not out of the > question. I don't see why it's out of the question. Why should it be? Nowadays it's not that much volume: 50 x 2 TB drives (+ parity drives depending on the type of RAID you're going to use + some spares). A mid size storage array scales 2 - 3 times that much: LSI OEMs (SGI, IBM, SUN/Oracle), Bull's Optima 1500/2000, DDN's S2A 6620, ... And that's a single array with dual controller (active/active) so you've got HA in the array. If you're going to set up an active/pasive pair of NAS heads, you don't even need the FC switches (those storage arrays have 4 - 12 FC ports so you can plug the servers right into the storage array controllers). You'd just need 2 servers that could scale in memory and I/O ... which is very common: mid level servers have 2 sockets (8 - 24 cores) and scale to around 96 GB and have 6 x PCIe slots. If you _DO_ need active/active NAS heads, then you can go with GPFS/GFS/CXFS filesystems and you'd need a couple of FC switches. [...] Rafa -- "We cannot treat computers as Humans. Computers need love." Happily using KDE 4.5.1 :)