Re: failed command: WRITE FPDMA QUEUED with Samsung 860 EVO

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On 1/4/19 8:33 AM, Sitsofe Wheeler wrote:
Blimey Laurence - you're really pushing the boat out on this one!

[ .. ]
I've yet to attach the disk directly to the mobo. It's a bit fiddly as
the most accessible port is meant for the DVD drive and I think it's
speed is slower than the others.

The speed of the ATA ports is lower than you might expect (this
machine is fairly old):

[ .. ]
[    3.242623] ata2.00: FORCE: horkage modified (noncq)
[    3.242683] ata2.00: supports DRM functions and may not be fully accessible
[    3.242686] ata2.00: ATA-11: Samsung SSD 860 EVO 500GB, RVT01B6Q,
max UDMA/133
[    3.242689] ata2.00: 976773168 sectors, multi 1: LBA48 NCQ (not used)
[    3.245518] ata2.00: supports DRM functions and may not be fully accessible
[    3.247611] ata2.00: configured for UDMA/133

'slower' is an understatement.
That adapter can't do NCQ, hence 'WRITE FPDMA QUEUED' (which _is_ an NCQ command) will never be issued.
So I'd be _very_ surprised if you still see this problem there ...

Do you?

Cheers,

Hannes
--
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@xxxxxxx			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)



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