Re: [PATCH v4] ata: libata: disable LPM for WDC WD20EFAX-68FB5N0 hard drives

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On 5/6/25 04:38, Ioannis Barkas wrote:
> Hello Mikko, thanks for sharing all those details, we have some
> additional information on this.

You did not do a reply-all...

> 
> I am suspicious with hw and not with you. A quirk will affect lots of
> devices and we need to be sure that we have examined the error you get
> so that there is no need to revert things. FYI, I have a disk with a
> quirk for no obvious reason on all hosts because nForce had NCQ
> trouble with it. If a quirk gets applied usually it stays for a long
> time if not forever.
> 
> Back to your case, on first look I can see that disks are in mint
> condition and are running the default fw, 82.00A82. Damien is there a
> newer version available?

I need to disk serial numbers for checking that but Mikko redacted it.

Mikko,

Please send me the serial numbers of your disks. You can send that privately to
me. Thanks.

> Please run a short test to each one to ensure that everything is OK
> after working for 10K+ hours and share their health log again. It is
> clear that both go south at the same time so RAID array dies as
> expected following that initial event. You just leave the PC on and
> then you get that event on both?
> 
> Supposing you get no error at disks after all that but still disks go
> offline, I would suggest to update your board fw to version 3621 and
> retest. The controller-disk combo should work fine. Just to clarify
> things, upon turning off LPM, you get no error at all?
> 
> Except the short form of lspci, let's get the fulll dump for SATA
> controller to see its active PCI settings with:
> sudo lspci -nnnnvvvvxxxxks 01:00.1
> 
> You can get it before touching anything and then with 3621 fw if you
> update your board. This will pinpoint if anything has been modified
> between different fw releases.
> 
> If the problem remains no matter what, a quirk is inevitable. Do we
> wish to block LPM on Intel hosts while no one has reported errors? How
> about a new quirk called ATA_QUIRK_NO_LPM_ON_AMD500 for 500 series ICs
> or ATA_QUIRK_NO_LPM_ON_AMD similar to ATA_QUIRK_NO_LPM_ON_ATI blocking
> LPM for ATI chips?
> 
> Best regards,
> Ioannis
> 


-- 
Damien Le Moal
Western Digital Research




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