sanity check: is 9211-8i, on 8.3, with IT firmware still "the one"

Peter Maloney peter.maloney at
Fri Jan 20 09:56:59 UTC 2012

On 01/20/2012 10:11 AM, Michael Fuckner wrote:
> On 01/20/2012 09:50 AM, Peter Maloney wrote:
> Hi all,
>> The "hot pull test":
>> --------------
>> dd if=/dev/random of=/somewhere/on/the/disk bs=128k
>> pull disk
>> wait 1 second
>> put disk back in
>> wait 1 second
> this is way too fast- if a device is added or removed there is a
> complete rediscovery on the SAS-bus which takes at least 15 seconds.
Good point. But as a test, it was very reliable for me in determining
that the SSD firmware version was the fault. And I think it is true that
it takes about 15 seconds before the "zpool online ..." will work. So
let's insert "wait 15+ seconds" before the "zpool online" command. And
optionally change all waits to 15+ seconds, depending on what you want
to prove (production-like environment vs. make no compromise to make it

> In production environments this short span wouldn't happen, so this
> test may produce segfaults, but it is not realistic.
I am not sure if you are referring to my seg faults I caused, but FYI
when the timeouts happened on their own, without hot pulling or issuing
any commands to test it, I could always cause a seg fault minutes, hours
or days later by running either:

- gpart show


- gpart show da##

and a panic by running:

- gpart recover da##


- camcontrol reset 0:#:0

> Regards,
>  Michael!
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Peter Maloney
Brockmann Consult
Max-Planck-Str. 2
21502 Geesthacht
Tel: +49 4152 889 300
Fax: +49 4152 889 333
E-mail: peter.maloney at

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