On Wed, 2019-01-02 at 11:10 -0500, Laurence Oberman wrote:
> On Wed, 2019-01-02 at 15:29 +0000, Sitsofe Wheeler wrote:
> > (Also trying linux-ide list)
> >
> > On Wed, 2 Jan 2019 at 15:25, Sitsofe Wheeler <sitsofe@xxxxxxxxx>
> > wrote:
> > >
> > > Hi,
> > >
> > > I recently purchased a SATA Samsung 860 EVO SSD and put it in an
> > > old
> > > HP microserver (which has an AMD N36L). By default, when the disk
> > > load
> > > becomes a little heavy e.g. by running a job like
> > >
> > > fio --name=test --readonly --rw=randread --filename /dev/sdb --
> > > bs=32k \
> > > --ioengine=libaio --iodepth=32 --direct=1 --runtime=10m --
> > > time_based=1
> > >
> > > the kernel starts repeatedly producing error messages like:
> > >
> > > [ 1177.729912] ata2.00: exception Emask 0x10 SAct 0x3c000 SErr
> > > 0x0
> > > action 0x6 frozen
> > > [ 1177.729931] ata2.00: irq_stat 0x08000000, interface fatal
> > > error
> > > [ 1177.729943] ata2.00: failed command: WRITE FPDMA QUEUED
> > > [ 1177.729962] ata2.00: cmd 61/80:70:80:50:e6/06:00:00:00:00/40
> > > tag
> > > 14
> > > ncq dma 851968 out
> > > [ 1177.729962] res 40/00:80:00:5a:e6/00:00:00:00:00/40
> > > Emask
> > > 0x10 (ATA bus error)
> > > [ 1177.729978] ata2.00: status: { DRDY }
> > > [ 1177.729986] ata2.00: failed command: WRITE FPDMA QUEUED
> > > [ 1177.730002] ata2.00: cmd 61/00:78:00:57:e6/03:00:00:00:00/40
> > > tag
> > > 15
> > > ncq dma 393216 out
> > > [ 1177.730002] res 40/00:80:00:5a:e6/00:00:00:00:00/40
> > > Emask
> > > 0x10 (ATA bus error)
> > > [ 1177.730017] ata2.00: status: { DRDY }
> > > [ 1177.730024] ata2.00: failed command: WRITE FPDMA QUEUED
> > > [ 1177.730039] ata2.00: cmd 61/00:80:00:5a:e6/05:00:00:00:00/40
> > > tag
> > > 16
> > > ncq dma 655360 out
> > > [ 1177.730039] res 40/00:80:00:5a:e6/00:00:00:00:00/40
> > > Emask
> > > 0x10 (ATA bus error)
> > > [ 1177.730053] ata2.00: status: { DRDY }
> > > [ 1177.730060] ata2.00: failed command: WRITE FPDMA QUEUED
> > > [ 1177.730078] ata2.00: cmd 61/00:88:00:5f:e6/01:00:00:00:00/40
> > > tag
> > > 17
> > > ncq dma 131072 out
> > > [ 1177.730078] res 40/00:80:00:5a:e6/00:00:00:00:00/40
> > > Emask
> > > 0x10 (ATA bus error)
> > > [ 1177.730096] ata2.00: status: { DRDY }
> > > [ 1177.730108] ata2: hard resetting link
> > > [ 1178.205831] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl
> > > 300)
> > > [ 1178.206165] ata2.00: supports DRM functions and may not be
> > > fully
> > > accessible
> > > [ 1178.209743] ata2.00: supports DRM functions and may not be
> > > fully
> > > accessible
> > > [ 1178.212786] ata2.00: configured for UDMA/133
> > > [ 1178.212826] ata2: EH complete
> > > [ 1178.212988] ata2.00: Enabling discard_zeroes_data
> > >
> > > I tried moving the SSD to another caddy and bay but the issue
> > > persists. None of the regular hard disks (a Western Digital and a
> > > Seagate) nor the other SSD (a Crucial MX500) already in the
> > > system
> > > trigger the issue the Samsung 860 EVO does. Adding
> > >
> > > libata.force=2.00:noncq
> > >
> > > seems to make the issue go away but seemingly at some speed cost
> > > (at
> > > least compared to what the MX500 achieves). The OS in use is
> > > Ubuntu
> > > 18.04 with a 4.15.0-43-generic kernel but even a 4.18.0-13-
> > > generic
> > > had
> > > the same issue.
> > >
> > > Is there anything software-wise that might need investigating
> > > that
> > > would allow NCQ to work and a better speed to be reached?
> >
> >
>
> Hello
>
> I have seen issues reported due to low power delivery to the drive.
> However investigating this, its starts with an exception Emask and
> then
> the link error code runs.
> Reviewing online some folks are reporting cable issues can cause this
> or firmware.
> I don't have one to test myself, and you are using an enclosure. Are
> you able to connect direct to the motherboard via another cable and
> test again.
>
> Regards
> Laurence
I managed to find a 860 so going to test it and see if I see the same
behavior and report back
Thanks
Laurence
