linux-kernel - Re: mdraid causing mvsas to lockup?

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Message-Id: <200909211016.45679.tfjellstrom@shaw.ca>
Date:	Mon, 21 Sep 2009 10:16:45 -0600
From:	Thomas Fjellstrom <tfjellstrom@...w.ca>
To:	linux-raid@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	"linux-scsi" <linux-scsi@...r.kernel.org>
Subject: Re: mdraid causing mvsas to lockup?

On Fri September 18 2009, Thomas Fjellstrom wrote:
> On Fri September 18 2009, Thomas Fjellstrom wrote:
> > On Thu September 17 2009, Thomas Fjellstrom wrote:
> > > On Thu September 17 2009, Kristleifur Daðason wrote:
> > > > On Thu, Sep 17, 2009 at 11:02 PM, Thomas Fjellstrom
> > > > <tfjellstrom@...w.ca>
> > >
> > > wrote:
> > > > > On Thu September 17 2009, John Bridges wrote:
> > > > >> I'm a fan of the SuperMicro AOC-SAT2-MV8, great card.
> > > > >> http://www.supermicro.com/products/accessories/addon/AOC-SAT2-MV8.
> > > > >>cf m
> > > > >>
> > > > >> It's an 8 port PCI-X card, works in both PCI and PCI-X slots.
> > > > >>
> > > > >> SATA2
> > > > >>
> > > > >> Drivers for Linux are stable, built in.
> > > > >
> > > > > Have you had any experience with the AOC-SASLP-MV8? I've got one
> > > > > and have been having no end of issues with it under linux.
> > > > >
> > > > > --
> > > > > Thomas Fjellstrom
> > > > > tfjellstrom@...w.ca
> > > > > --
> > > >
> > > > I have,
> > > >
> > > > or rather, I've tried to get an AOC-SASLP-MV8 card going. I think I
> > > > can safely say that at least Linux kernel 2.6.31 is a requirement.
> > > > The card was basically useless with everything up to 2.6.30, then I
> > > > tried 2.6.31-rc5 on a whim and it kicked in. Built-in driver support,
> > > > that is. However it wasn't stable, it dropped disks when syncing a
> > > > large array. I've been meaning to test on 2.6.31 final, and am pretty
> > > > optimistic.
> > >
> > > Yeah, the driver didn't appear till .30. I have 2.6.31-git4 installed
> > > right now, and no matter what I do, the controller starts spewing
> > > errors:
> > >
> > > [ 1455.698186] drivers/scsi/mvsas/mv_sas.c 1669:mvs_abort_task:rc= 5
> > > [ 1455.698196] drivers/scsi/mvsas/mv_sas.c 1608:mvs_query_task:rc= 5
> > > ...
> > > [ 1424.708085] end_request: I/O error, dev sdh, sector 3072
> > > [ 1424.708106] sd 0:0:3:0: [sdh] Unhandled error code
> > > [ 1424.708111] sd 0:0:3:0: [sdh] Result: hostbyte=DID_OK
> > > driverbyte=DRIVER_TIMEOUT
> > > [ 1424.708118] sd 0:0:3:0: [sdh] CDB: Read(10): 28 00 00 00 08 00 00 04
> > > 00 00
> > >
> > > And thats with perfectly good disks, and with smartd/hddtemp disabled
> > > (they were causing one of my disks to barf).
> > >
> > > All I have to do is start a read from any disk, and after a few
> > > minutes, the card starts erroring out, and then dies.
> > >
> > > It actually seems like it got more unstable from .30 to .31.
> > >
> > > I've been trying to get some help with it on the lkml/ide/scsi lists
> > > for a while now, one person has tried to help, but thats about it.
> >
> > Very strange. I've found that reading from all 4 drives currently
> > connected to the controller at once, works. I have 4 dd commands, one
> > reading off each drive, and so far no errors, the dd commands aren't
> > locking up, and they are going full speed (120MB/s per drive).
> >
> > If however I attempt to bring up the md raid0 array ontop of these disks,
> >  the controller locks up, and all of the disks become inaccessible.
> >
> > Maybe it has something to do with it, but just as the system is booting,
> > I get the following, maybe related, maybe not:
> >
> > ata_id[5183]: HDIO_GET_IDENTITY failed for '/dev/block/8:96'
> > ata_id[5188]: HDIO_GET_IDENTITY failed for '/dev/block/8:112'
> > ata_id[5184]: HDIO_GET_IDENTITY failed for '/dev/block/8:80'
> >
> > (those map to sdg, sdh, and sdf in that order, no report for sde, the
> > first disk in the controller)
> 
> So I've let the controller and disks sit all day after finishing a full
>  read test (dd if=/dev/sd[efgh] of=/dev/null bs=8M) with all four 1TB
>  drives going at the same time, and I've had no errors at all. All four dd
>  commands finished without error, and went at full speed.
> 
> If I attempt to activate an md raid0 array ontop of any disks on this
> controller the controller starts having a fit, and all disks are
>  inaccessible till a hard reset (the machine won't fully reboot, or turn
>  off, as the "flushing scsi cache" or "shutting down LVM" steps will hang
>  waiting on drives on the wedged controller.
> 
> I would really like to get this fixed, if there's anything more I can do to
> help narrow down the problem further, I'll do my best.
> 

Does anyone have a clue what might be wrong? Something I could check into? I 
have a couple system migrations to do, and this is blocking that. (my old 
array has been making "click" noises for a year now, and I'm afraid it'll die 
at any time)

-- 
Thomas Fjellstrom
tfjellstrom@...w.ca
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