Re: AHCI + ST3160023AS + NCQ problems

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Matheus Izvekov wrote:
> Seagate drive ST3160023AS is correctly detected as supporting NCQ, but
> when its used with moderate loads, libata keeps throwing error
> messages until it finally decides to disable NCQ on it.
[]
> ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> ata1.00: ATA-6: ST3120026AS, 3.18, max UDMA/133

By the way, did you forget to remove a jumper on the drive
(the only jumper installed by default) that limits drive
usage to SATAI?

[]
> ata4.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x2 frozen
> ata4.00: cmd 61/1f:00:f4:14:52/00:00:09:00:00/40 tag 0 cdb 0x0 data 15872 out
>          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
> ata4: soft resetting port
> ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300)

..etc.   Try again without the jumper?  Note that NCQ is NOT supported
in SATAI mode, or there were some pre-standard implementations of it.
In SATAII, NCQ is standard (well... more or less anyway ;)

/mjt
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