A little story of failed raid5 (3ware 8000 series)

Gary Palmer gpalmer at freebsd.org
Tue Aug 28 03:04:27 PDT 2007

On Sun, Aug 26, 2007 at 11:38:19AM -0700, Darren Pilgrim wrote:
> Tom Judge wrote:
> >Tom Samplonius wrote:
> >>The real solution is RAID scrubbing:  a low level background process
> >>that reads every sector of every disk.  All of the real RAID systems
> >>do this (usually scheduled weekly, or every other week).  Most 3ware
> >>RAID card don't have this feature.
> >>
> >>So rather than not using RAID5 or RAID6 again, you should just not
> >>use 3ware anymore.
> >
> >If you use the 3dm2 management interface you can schedule verify and
> >rebuild tasks to run on a regular basis.  I think that 7500 series
> >controllers can do this, 9500 and 9550's definitely can.
> Actually it's all 7/8/9xxx series cards.  The 9xxx series cards also do 
> auto-verify so there's no need to schedule the task.

Sorry, I do not believe that is the case.  I have a 8506-4LP and if
I click on Management -> Scheduling in the 3dm web interface it says

(0x0C:0x0017): Scheduling is not supported on this controller model

However you might be able to cheat using the tw_cli port to run
the schedules out of cron rather than native on the card

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