George Georgalis wrote:
you can get a very nice 2 channel 4Gb FC 16 bay
sata-II enclosure that supports raid-6 et al from
caeneng.com (by infotrend) for a lot less than 10K,

Or you can do what I do and use AoE. Put together a box using hardware something like this (just some notes I happened to have nearby, I would not use generic "super talent" memory in such a critical system, for example), install Linux and one of the AoE target software options available (vblade or qaoed):

SUPERMICRO X7DVL-E-O Dual 771 Intel 5000V ATX Server Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E16813182097&Tpk=X7DVL-E 335.99

Intel Xeon 5110 Woodcrest 1.6GHz 4M shared L2 Cache Socket 771 Active or 1U Processor - Retail http://www.newegg.com/Product/Product.aspx?Item=N82E16819117081 206.99

SUPER TALENT 1GB 240-Pin DDR2 FB-DIMM ECC Fully Buffered DDR2 667 (PC2 5300) Server Memory - Retail http://www.newegg.com/Product/Product.aspx?Item=N82E16820609177 69.99

SUPERMICRO CSE-932T-R760B Black 3U Server Case 760W Triple-Redundant - Retail http://www.newegg.com/Product/Product.asp?Item=N82E16811152069 759.99

Western Digital Raptor WD1500ADFD 150GB 10,000 RPM 16MB Cache Serial ATA150 Hard Drive - OEM http://www.newegg.com/Product/Product.aspx?Item=N82E16822136012&Tpk=WD1500ADFD 179.99 * 15 = 2699.85

LSI LOGIC LSI00100 PCI-X SATA / SAS SAS3442X-R KIT 3Gb/s 8-port IR RAID 0/1/1E/10E - Retail http://www.newegg.com/Product/Product.aspx?Item=N82E16816118030 289.99 * 2 = 579.98

FULLY OUTFITTED DISK NODE TOTAL 4652.79 for 2.25T of storage on 15 spindles. I specifically chose the best price/storage disks and not the biggest disks because odds are you don't need huge volumes of storage but need good performance instead. The biggest part of performance these days is all in the number of spindles. I would recommend buying two of these setups and mirroring across them for redundancy or mirroring across pairs of drives in one of these systems which would give you 1T of storage and a hot spare. Definitely DO NOT just go and RAID5 this whole thing into one big volume. Performance will suck and you are far more likely to lose your data on such a large RAID set.

Using commodity ethernet switches (something GOOD like Cisco or HP and definitely not Dell, Linksys, Netgear etc) you've got a great SAN without having to get into the expense of buying fibrechannel HBA's, fibrechannel switches, dealing with the drivers, and dealing with the fibrechannel learning curve. You already know how to set up ethernet and have ethernet infrastructure. Might as well capitalize on that investment. Since it is a Linux box dedicated to providing disk storage you can manage/monitor it the same way you do with all of your other Linux boxes.

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