Re: mfiutil reports "PSTATE 0x0020" new drive state

On Monday, October 18, 2010 12:55:18 pm Sergey Kandaurov wrote:
> On 16 October 2010 02:18, Sergey Kandaurov <pluknet_at_gmail.com> wrote:
> > On 16 October 2010 00:51, Charles Owens <cowens_at_greatbaysoftware.com> wrote:
> >>  Hmm... the problem appears to have resolved itself.  After a few hours the
> >> new drive seems to have gone back into the array, and the original hot spare
> >> drive put back into hot-spare state.
> >>
> >> So I'm interpreting state 0x0020 to therefore mean something like "hang on
> >> while I use this new drive to automatically put everything back as it was
> >> before the failure".  Is this correct?
> >>
> >> Thanks,
> >> Charles
> >>
> >> [root_at_Bsvr ~]# mfiutil show drives
> >> mfi0 Physical Drives:
> >> (  149G) ONLINE<ST9160511NS SN04 serial=9SM236JR>  SATA enclosure 1, slot 0
> >> (  149G) ONLINE<ST9160511NS SN04 serial=9SM237KF>  SATA enclosure 1, slot 1
> >> (  149G) ONLINE<ST9160511NS SN04 serial=9SM236N8>  SATA enclosure 1, slot 2
> >> (  149G) HOT SPARE<ST9160511NS SN04 serial=9SM237EK>  SATA enclosure 1, slot
> >> 3
> >> (  149G) ONLINE<ST9160511NS SN04 serial=9SM238AG>  SATA enclosure 1, slot 4
> >>
> >>
> 
> >>>
> [...]
> >>> [root_at_svr ~]# mfiutil show drives
> >>> mfi0 Physical Drives:
> >>> (  149G) ONLINE<ST9160511NS SN04 serial=9SM236JR>  SATA enclosure 1, slot
> >>> 0
> >>> (  149G) ONLINE<ST9160511NS SN04 serial=9SM237KF>  SATA enclosure 1, slot
> >>> 1
> >>> (  149G) ONLINE<ST9160511NS SN04 serial=9SM236N8>  SATA enclosure 1, slot
> >>> 2
> >>> (  149G) ONLINE<ST9160511NS SN04 serial=9SM237EK>  SATA enclosure 1, slot
> >>> 3
> >>> (  149G) PSTATE 0x0020<ST9160511NS SN04 serial=9SM238AG>  SATA enclosure
> >>> 1, slot 4
> >>>
> >>> mfi0:<LSI MegaSAS 1078>  port 0x1000-0x10ff mem
> >>> ...
> >>>
> >
> > Hi, Charles Owens.
> >
> > 0x20 is much likely to be the copyback physical state,
> > which is missing in enum mfi_pd_state.
> > And what you've experienced is copyback feature in action :)
> > Your array has been rebuilt with HSP as its ordinal PD, then you
> > switched failed drive
> > with good one, and HSP came into copyback mode to move all its data back
> > to good disk. That prevents reordering of disk numbers in array and
> > double rebuilding.
> >
> 
> So, it no one objects, I'd like to commit this change.

If you have access to the MFI docs (or a reference in the Linux driver, e.g.)
then this is fine.  The existing pd_state enum lists the values for PD state
that were listed in the MFI docs I had access to at the time I wrote mfiutil.

-- 
John Baldwin