[OpenIndiana-discuss] [illumos-Developer] SES support for Super Micro chassises?
pasik at iki.fi
Mon Mar 14 20:18:24 UTC 2011
On Mon, Mar 14, 2011 at 11:43:26AM -0400, Eric Schrock wrote:
> On Mon, Mar 14, 2011 at 10:51 AM, Pasi Kärkkäinen <pasik at iki.fi> wrote:
> Hmm.. so does someone know the status of FMA regarding SES?
> Since I did the majority of that work, yes ;-)
Thanks for the detailed answer! :)
This would be an interesting Google Summer of Code project for someone..
> Was FMA made to work with SES only in fishworks/openstorage and not in
> There are several parts to FMA and SES integration:
> 1. Enumeration of SES devices and sensors
> 2. Correlation of 'device-as-detector' SCSI faults (unrecoverable device
> error) to physical devices
> 3. Monitoring of fan and PSU sensors.
> 4. Correlation of ZFS faults with physical devices
> Of these, 1-3 are in illumos. So if you have a SES enclosure you will get
> things like SMART failure that identify drives in a physically meaningful
> way ("Bay 5", etc), provided your SES target is good about setting the
> element names correctly. The basic sensor transport and monitoring
> framework will also work, so you'll get faults for PSU and fan failure.
> The vast majority of #4 is in illumos. ZFS vdevs can be associated with
> FRUs (the physical manifestation of a device), and the diagnosis engine
> knows how to generate faults against FRUs (look for ZPOOL_CONFIG_FRU).
> But nothing ever sets that up in illumos. The reason this never made it
> back completely was that the code I wrote didn't handle offline
> reconfiguration of devices (powering off and moving devices around),
> something that we could get away with in an appliance environment but not
> acceptable for general use.
> Also, the fishworks syseventd zfs module, which handled automatic
> replacement of MPxIO devices, as well as a variety of other cirumstances
> (log, cache, spare, etc) never made it back again because it had a lot of
> appliance-specific assumptions.
> Someone suitably motivated could pick up this work for illumos. It would
> be a good opportunity to re-examine the ZFS/FMA model (something that was
> talked about within Oracle but will probably never see the light of day).
> Hope that helps,
> - Eric
> Eric Schrock
> 275 Middlefield Road, Suite 50
> Menlo Park, CA 94025
> Visible links
> 1. mailto:pasik at iki.fi
> 2. http://blogs.sun.com/eschrock/entry/zfs_fma_hotplug_and_fishworks
> 3. http://blogs.sun.com/eschrock/entry/solaris_platform_integration_generic_disk
> 4. http://blogs.sun.com/robj/entry/a_sensor_abstraction_layer_for
> 5. http://blogs.sun.com/eschrock/entry/ses_sensors
> 6. http://prefetch.net/blog/index.php/2008/07/15/scsi-enclosure-services/
> 7. http://www.delphix.com/
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