Well, the only somewhat good news is the sata3 ports appear to atleast work faster in Ubuntu 64-bit:
I deleted the crappy Marvell(Gsata) Raid0 configurator in BIOS, but kept the Marvell 9128 "onchip" controller enabled.
-then just set both drives connected on the SATA3 ports to AHCI mode, in bios.
finally in Ubuntu, just use "mdadm" software Raid manager to create a "Raid0" xfs.
-the colums may be a little mashed below but atleast now I'm hitting ~265MB/sec steady write transfers. But this is still along way off from the "5 Gb/sec" (500Mb/sec) capacity of Sata3, as mentioned by gigabyte.
-And of course, to really find out ?, I would need 8 more of these SATA3 drives and ports-which of course this board doesn't have.
Or, a couple of Intel SSD's. -which of course, I cannot afford.
Bottom-line is Linux "mdadm" raid manager is BETTER than Marvell fake-hardware-raid in BIOS !!!
MARVELL, was, and will probably always be a junk-semiconductor maker.
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Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 0.00 0.00 2.67 0.00 16.00 12.00 0.01 5.00 1.25 0.33
sdb 0.00 1817.33 0.00 246.67 0.00 126161.33 1022.93 130.48 505.04 4.05 100.00
sdc 0.00 1815.00 0.00 249.33 0.00 127658.67 1024.00 73.92 286.40 4.01 100.00
md0 0.00 0.00 0.00 4150.67 0.00
265313.33 127.84 0.00 0.00 0.00 0.00
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I'm happy with "10" Sata2 ports.
I may have expected too much with this sata3/usb3 marketing ploy by Gigabyte, but for the money the X58A-UDR3 is still well wrth it.
Again, to me, this MB is very stable and feels quality-built all around.
It OC's like a champ and Ubuntu 64-bit screams on this board.