I'm having a lot of troubles after adding a third AOC-SAS2LP-MV8 card. Worked
quite nicely with two, but with the third card I get a lot of 

[20190.510780] ata22.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[20190.511766] ata22.00: failed command: WRITE DMA EXT
[20190.512660] ata22.00: cmd 35/00:80:68:fe:d0/00:00:10:01:00/e0 tag 17 dma 
65536 out
[20190.512660]          res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 
(timeout)
[20190.514557] ata22.00: status: { DRDY }
[48052.265328] ata21.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[48052.266364] ata21.00: failed command: WRITE DMA EXT
[48052.267344] ata21.00: cmd 35/00:00:a0:7a:dd/00:01:fc:00:00/e0 tag 29 dma 
131072 out
[48052.267344]          res 40/00:ff:00:00:00/00:00:00:00:00/40 Emask 0x4 
(timeout)
[48052.269360] ata21.00: status: { DRDY }
[91595.340801] ata21.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[91595.341809] ata21.00: failed command: WRITE DMA EXT
[91595.342768] ata21.00: cmd 35/00:00:30:cb:4b/00:01:42:01:00/e0 tag 29 dma 
131072 out
[91595.342768]          res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 
(timeout)
[91595.344676] ata21.00: status: { DRDY }

These two disks is (and it's always different disks), strangely enough (?), on 
the
oldest card (which never shown any problems before - if it had been the newest, 
one
could have considered hardware problems).

And shortly after this, the kernel hard locks, forcing the hardware watchdog to 
reset
the machine.

This is, currently, kernel version 3.18-rc3 (I've tried so many versions the 
last couple
of months), but I notice that the mvsas driver haven't had any real changes 
since 3.9 or
there a bouts (one of the first that actually worked,w which I tried about a 
year or so
ago).
--
Geologists recently discovered that "earthquakes" are
nothing more than Bruce Schneier and Chuck Norris
communicating via a roundhouse kick-based cryptosystem.

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