On Wednesday 12 March 2008 03:28:31 pm Oliver Schonrock wrote:
> Hi
>
> We have a Dell SC1435 with a SAS 5i raid controller (which is an OEM LSI
> Logic SAS1064, supported under FreeBSD by the mpt driver). The array
> works just fine, but monitoring the array is also important and there
> seems to be no support under mpt(4) right now:
>
> http://nico.schottelius.org/document...aid-monitoring
>
> I snooped around in the source code and found these snippets
>
> mpt_raid.c
>
> const char *
> mpt_disk_state(struct mpt_raid_disk *disk)
> {
> switch (disk->config_page.PhysDiskStatus.State) {
> case MPI_PHYSDISK0_STATUS_ONLINE:
> return ("Online");
> case MPI_PHYSDISK0_STATUS_MISSING:
> return ("Missing");
> case MPI_PHYSDISK0_STATUS_NOT_COMPATIBLE:
> return ("Incompatible");
> case MPI_PHYSDISK0_STATUS_FAILED:
> return ("Failed");
> case MPI_PHYSDISK0_STATUS_INITIALIZING:
> return ("Initializing");
> case MPI_PHYSDISK0_STATUS_OFFLINE_REQUESTED:
> return ("Offline Requested");
> case MPI_PHYSDISK0_STATUS_FAILED_REQUESTED:
> return ("Failed per Host Request");
> case MPI_PHYSDISK0_STATUS_OTHER_OFFLINE:
> return ("Offline");
> default:
> return ("Unknown");
> }
> }
>
> /*
> * Update in-core information about RAID support. We update any entries
> * that didn't previously exists or have been marked as needing to
> * be updated by our event handler. Interesting changes are displayed
> * to the console.
> */
> int
> mpt_refresh_raid_data(struct mpt_softc *mpt)
> {
>
>
> .....
>
> mpt_disk_prt(mpt, mpt_disk, "%s\n", mpt_disk_state(mpt_disk));
>
> ....
>
> Which looks to me like the raid controller/driver would report when
> things go wrong and how it is dealing with it etc. The messages printed
> by the driver make it into dmesg output.
>
> Slight Aside:
> -------------
> We had a problem with:
>
> case MPI_EVENT_QUEUE_FULL:
> {
> struct cam_sim *sim;
> struct cam_path *tmppath;
> struct ccb_relsim crs;
> PTR_EVENT_DATA_QUEUE_FULL pqf =
> (PTR_EVENT_DATA_QUEUE_FULL) msg->Data;
> lun_id_t lun_id;
>
> mpt_prt(mpt, "QUEUE FULL EVENT: Bus 0x%02x Target
> 0x%02x Depth "
> "%d\n", pqf->Bus, pqf->TargetID, pqf->CurrentDepth);
>
>
> which we "fixed" by writing an rc script to run camcontrol like this:
>

http://www.zulustips.com/2007/09/06/...l-sas-5ir.html
>
> (not sure what this actually does, but it works...)
>
> Anyway these QUEUE FULL EVENT message were appearing in dmesg output.
>
> So, my very simplistic question is:
>
> While there is no mpt cli management interface to query the state of the
> raid array, can I just write a cron driven script which checks dmesg
> output every 10min, say, and notifies the administrator if it finds any
> messages from mpt (some simple grepping and diff'ing against dmesg.boot,
> should be able to keep this quiet unless there is really something to
> report).
>
> Will this work? Is it a reasonable "work around" for the missing raid
> monitoring support mpt arrays?
>
> Thanks in advance.


The problem is that on your box the mpt_raid stuff isn't working because it
probes for the RAID metadata too early, so you don't get any of the raid
messages.

--
John Baldwin
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