The Chassisfor the chassis i decided use norco 4220 4u chasis 20x 3.5 hdd bays.
http://www.norcotek.com/item_detail.php?categoryid=1&modelno=RPC-4220#mware.com about 320+shipping, newegg is about 350 with shipping.
* 4U rackmount design
* 20x hot-swappable SATA (I or II) / SAS drive bays, two 2.5" OS drive brackets
* Five internal SFF-8087 Mini SAS connectors support up to twenty 3.5" or 2.5" SATA (I or II) or SAS hard drives;
* Hot-swappable HDD tray with special designed power-off and lock mechanism.
* 1 x slim CD-ROM bay, 20 x 3.5 " hot-swappable drive bays, 2 x 2.5" OS drive brackets.
* Six ball-bearing cooling fans for better ventilation
* Support EEB (12"x13"), CEB(12"x10.5"), ATX (12"x9.6"), Micro ATX (9.6" x 9.6") motherboard
* RoHS Compliant
* Redundant 4pin molex PSU connectors support redundant power supply
* Screwless top cover
* Smooth border prevent lacerating your skin
The HDDThe HDD i decided to use 2.5inch WD blue 5000BEVT about 74 usd per,
74x20 totally is 1480
the reason i chooise 2.5 hdd is because the low power consumption,
for example:
Seagate Momentus 2.5" HDD:
* Average read/write power 1.6 Watts
* Idle power 0.7 Watts
* Idle noise 2.3 bels
* Seek noise 2.6 bels
Seagate 7200.1 Desktop 3.5" HDD:
* Average read/write power 13 Watts
* Idle power 9.3 Watts
* Idle noise 2.8 bels
* Seek noise 3.7 bels
one 3.5 hdd running cost is about 10x 2.5 hdd in energy.
The CardThe card i choose Adaptec AAR-2610SA 6 Port 64MB SATA RAID Controller
they are cheap, you can get like 60 bucks from ebay for a used one.PCI 133,
64mb ram pravent data loss.
This is a 6 channel Serial ATA RAID controller card that supports a variety of configurations including 0, 1, 5, 10, and JBOD. Functionally and operationally, it is identical to the Adaptec 2410SA, except it gives you 2 EXTRA ports (or a 2810SA with 2 less ports). It is running the latest firmware, and is supported by both Adaptec 2x10SA drivers, and Dell drivers. All recent versions of Linux natively support this as an "afa" device. Works in Dell & non-Dell systems equally well.
* Intel Intelligent I/O processor
* 64MB Cache
* RAID 0, 1, 10, 5 and JBOD
* Online Capacity Expansion
* RAID Level Migration
* 48-bit LBA supports large drives & Multi Terabyte Arrays
The MotherboardItx..comming soon.
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