Hi @Joseph,
Good news and bad news.
Good news: the Crucical 1TB M550s were recognized and queued trim support was
disabled:
[ 3.661992] ata4.00: disabling queued TRIM support
[ 3.661993] ata4.00: ATA-9: Crucial_CT1024M550SSD1, MU01, max UDMA/133
[ 3.661994] ata4.00: 2000409264 sectors, multi 16: LBA48 NCQ (depth
31/32), AA
[ 3.662337] ata3.00: disabling queued TRIM support
[ 3.662337] ata3.00: ATA-9: Crucial_CT1024M550SSD1, MU01, max UDMA/133
[ 3.662338] ata3.00: 2000409264 sectors, multi 16: LBA48 NCQ (depth
31/32), AA
The bad news: it did not stop "failed command: WRITE FPDMA QUEUED" errors, e.g.
[ 12.098247] ata4.00: exception Emask 0x10 SAct 0x60000001 SErr 0x400100
action 0x6 frozen
[ 12.098266] ata4.00: irq_stat 0x08000000, interface fatal error
[ 12.098280] ata4: SError: { UnrecovData Handshk }
[ 12.098291] ata4.00: failed command: WRITE FPDMA QUEUED
[ 12.098304] ata4.00: cmd 61/00:00:48:23:01/04:00:03:00:00/40 tag 0 ncq
524288 out
[ 12.098304] res 40/00:f4:48:1f:01/00:00:03:00:00/40 Emask 0x10
(ATA bus error)
[ 12.098346] ata4.00: status: { DRDY }
[ 12.098355] ata4.00: failed command: WRITE FPDMA QUEUED
[ 12.098368] ata4.00: cmd 61/00:e8:48:1b:01/04:00:03:00:00/40 tag 29 ncq
524288 out
[ 12.098368] res 40/00:f4:48:1f:01/00:00:03:00:00/40 Emask 0x10
(ATA bus error)
[ 12.098409] ata4.00: status: { DRDY }
[ 12.098417] ata4.00: failed command: WRITE FPDMA QUEUED
[ 12.098429] ata4.00: cmd 61/00:f0:48:1f:01/04:00:03:00:00/40 tag 30 ncq
524288 out
[ 12.098429] res 40/00:f4:48:1f:01/00:00:03:00:00/40 Emask 0x10
(ATA bus error)
[ 12.098466] ata4.00: status: { DRDY }
[ 12.098476] ata4: hard resetting link
A RAID1 scrub indicated there was a repair on ATA4, so these resets
caused some data issue(es).
So far, only "libata.force=X.YY:noncq" seems to fix the problem. After reading
quite a few articles, I'm beginning to think there are some pretty serious
issues w/ the kernel regarding SSDs and controller interactions. There are
many, many folks having trouble, and the consistent response is to disable NCQ,
although there may also be some interactions w/ MSI and SSDs, as least as
indicated by
- http://article.gmane.org/gmane.linux.ide/58740
- https://bugzilla.kernel.org/show_bug.cgi?id=60731
What surprises me is that so many vendors are providing SSD backed VMs
based on Linux, and yet it's mostly individuals seeing these problems
with common distros, e.g. Ubuntu, Fedora, CentOS. Is there some major
disconnect here?
** Bug watch added: Linux Kernel Bug Tracker #60731
http://bugzilla.kernel.org/show_bug.cgi?id=60731
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https://bugs.launchpad.net/bugs/1363462
Title:
Crucial M550 1TB SSD missing from NCQ TRIM blacklist
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