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apport-collect 1894230
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This change has been made by an automated script, maintained by the
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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1894230
Title:
Device queue depth should be 31 not 32
Status in linux package in Ubuntu:
Incomplete
Bug description:
Setting drive device/queue_depth to 31 from 32 resolved an issue
whereby I had numerous zpool and ATA errors but only under high load
(zpool scrub) or when trimming the drives. Was able to reduce
incidence by setting to libata.force=noncqtrim, and resolve with
libata.force=noncq, but with an obvious performance impact.
Upstream kernel seems to be aware of this issue, so I'm assuming this
is a downstream or udev configuration issue, see:
https://ata.wiki.kernel.org/index.php/Libata_FAQ#Enabling.2C_disabling_and_checking_NCQ
Scrub repaired all errors, but, because repairs were made, it seems
like it's not just a communications issue, and that there is the
potential for DATA LOSS on non-redundant and/or non-ZFS
configurations.
Sample syslog error:
[ 33.688898] ata1.00: exception Emask 0x50 SAct 0x1003000 SErr 0x4c0900
action 0x6 frozen
[ 33.688908] ata1.00: irq_stat 0x08000000, interface fatal error
[ 33.688913] ata1: SError: { UnrecovData HostInt CommWake 10B8B Handshk }
[ 33.688917] ata1.00: failed command: WRITE FPDMA QUEUED
[ 33.688923] ata1.00: cmd 61/00:60:df:28:3d/01:00:2a:00:00/40 tag 12 ncq
dma 131072 out
[ 33.688929] ata1.00: status: { DRDY }
[ 33.688931] ata1.00: failed command: WRITE FPDMA QUEUED
[ 33.688937] ata1.00: cmd 61/08:68:18:a9:d2/00:00:04:00:00/40 tag 13 ncq
dma 4096 out
[ 33.688942] ata1.00: status: { DRDY }
[ 33.688945] ata1.00: failed command: WRITE FPDMA QUEUED
[ 33.688951] ata1.00: cmd 61/00:c0:df:27:3d/01:00:2a:00:00/40 tag 24 ncq
dma 131072 out
[ 33.688956] ata1.00: status: { DRDY }
[ 33.688963] ata1: hard resetting link
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