Date: Tue, 07 Jul 2015 11:31:00 +0200 From: Willem Jan Withagen <wjw@digiware.nl> To: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>, Steve Wills <swills@freebsd.org> Cc: fs@freebsd.org Subject: Re: This diskfailure should not panic a system, but just disconnect disk from ZFS Message-ID: <559B9C54.9060903@digiware.nl> In-Reply-To: <alpine.GSO.2.01.1506211558510.4186@freddy.simplesystems.org> References: <5585767B.4000206@digiware.nl> <20150620221431.GB26416@mouf.net> <alpine.GSO.2.01.1506211558510.4186@freddy.simplesystems.org>
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On 21-6-2015 23:01, Bob Friesenhahn wrote:
> On Sat, 20 Jun 2015, Steve Wills wrote:
>>> rev=0x00 hdr=0x00
>>> vendor = 'Areca Technology Corp.'
>>> device = 'ARC-1120 8-Port PCI-X to SATA RAID Controller'
>>> class = mass storage
>>> subclass = RAID
>>
>> You may be hitting the zfs deadman panic, which is triggered when the
>> controller hangs. This can in some cases be caused by disks that die
>> in unusual
>> ways.
>
> Notice that the RAID controller is a PCI-X device (shared parallel, not
> dedicated serial like PCIe). The whole PCI backplane could have hung.
I had this panic problem a while ago, but since then it has sort of
recured quite a few times....
However this times I was working on the system and noticed it right
away. So I just went into the basement and chekced the box.
Console is not really dead:
- I can switch terminals
but cannot login
- I can ping
but cannot ssh into it.
- Can not break into the kernel
There is totally no I/O shown of the disk. No of the leds flash for lile
atleast 30 sec...
Just the reset button get me back to normal...
So that suggest a lot more that something is really hung.
Question is how can I debug this? Breaking into the kernel (ctl-del-esc)
does not seem to work...
Also contemplating to get an Areca controller for PCIe instead but that
is shelling out again another $250. And that just to get JBODs
--WjW
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