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From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk>
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To: DanGer <danger@wilbury.sk>
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cc: current@freebsd.org
Subject: Re: ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=207594611
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DanGer wrote:

> I'm getting this errors too on 5.2.1, so I don't know what's going on.
> The HDD is about 3 a 2 months old and not under big load.
> And my box uses to freeze because of these errors...

> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D161995=
103
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D360911=
9
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D361030=
3
> ad0: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=3D21064=
831
> ad0: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=3D21064=
831
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D394191=
9
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D394204=
7
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D394275=
1
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D394275=
1
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D394326=
3
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D394326=
3
> ad0: FAILURE - READ_DMA status=3D51<READY,DSC,ERROR> error=3D84<ICRC,AB=
ORTED> LBA=3D3943263
> ad0: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=3D21064=
383
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D376723=
9
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D376706=
3
> ad0: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=3D376706=
3
> ad0: FAILURE - READ_DMA status=3D51<READY,DSC,ERROR> error=3D84<ICRC,AB=
ORTED> LBA=3D3767063

You are having massive ICRC problems which are different and most likely =

due to bad cables/connectors or cables that are turned around (blue=20
connector at controller, black/grey at devices), or it can be a=20
weak/overloaded PSU.

-S=F8ren