On 12 Feb, 2011, at 09:06 , Alexander Motin wrote:
> Author: mav
> Date: Sat Feb 12 07:06:40 2011
> New Revision: 218596
> URL: http://svn.freebsd.org/changeset/base/218596
>
> Log:
> Disable NCQ for multiport Marvell 88SX61XX SATA controllers. Simultaneous
> active I/O to several disks (copying large file on ZFS) causes timeout after
> just a few seconds of run. Single port 88SX6111 seems like not affected.
>
> Skip reading transferred bytes count for these controllers. It works for
> 88SX6111, but 88SX6145 always returns zero there. Haven't tested others,
> but better to be safe.
>
> Modified:
> head/sys/dev/ahci/ahci.c
>
I was using Marvell 6121 for quite some time with OCZ Throttle eSATA 8G flash
drive for zfs l2arc,
but the timeouts were not there from the beginning. Maybe NCQ was not enabled
in earlier drivers?
Also there is no other drive/ssd attached to the controller, the OCZ drive
reports that it supports 2 tag openings.
atapci2@pci0:4:0:0: class=0x01018f card=0x612111ab chip=0x612111ab rev=0xb2
hdr=0x00
vendor = 'Marvell Semiconductor (Was: Galileo Technology Ltd)'
device = '6121 SATA2 Controller'
class = mass storage
subclass = ATA
bar [10] = type I/O Port, range 32, base 0xbf00, size 8, enabled
bar [14] = type I/O Port, range 32, base 0xbe00, size 4, enabled
bar [18] = type I/O Port, range 32, base 0xbd00, size 8, enabled
bar [1c] = type I/O Port, range 32, base 0xbc00, size 4, enabled
bar [20] = type I/O Port, range 32, base 0xbb00, size 16, enabled
bar [24] = type Memory, range 32, base 0xfb9ff000, size 1024, enabled
cap 01[48] = powerspec 2 supports D0 D1 D3 current D0
cap 05[50] = MSI supports 1 message
cap 10[e0] = PCI-Express 1 legacy endpoint max data 128(128) link x1(x1)
ecap 0001[100] = AER 1 0 fatal 0 non-fatal 1 corrected
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