Re: FailSpare event?

On 13 Jan 2007, nix@esperi.org.uk uttered the following:

On 12 Jan 2007, Ernst Herzberg told this:

quoted

Then every about 60 sec 4 times

event=SpareActive
mddev=/dev/md3

I see exactly this on both my RAID-5 arrays, neither of which have any
spare device --- nor have any active devices transitioned to spare
(which is what that event is actually supposed to mean).

One oddity has already come to light. My /proc/mdstat says

md2 : active raid5 sdb7[0] hda5[3] sda7[1]
      19631104 blocks super 1.2 level 5, 64k chunk, algorithm 2 [3/3] [UUU]

md1 : active raid5 sda6[0] hdc5[3] sdb6[1]
      76807296 blocks super 1.2 level 5, 64k chunk, algorithm 2 [3/3] [UUU]

hda5 and hdc5 look odd. Indeed, --examine says

    Number   Major   Minor   RaidDevice State
       0       8        6        0      active sync   /dev/sda6
       1       8       22        1      active sync   /dev/sdb6
       3      22        5        2      active sync   /dev/hdc5

    Number   Major   Minor   RaidDevice State
       0       8       23        0      active sync   /dev/sdb7
       1       8        7        1      active sync   /dev/sda7
       3       3        5        2      active sync   /dev/hda5

0, 1, and *3*. Where has number 2 gone? (And how does `Number' differ
from `RaidDevice'? Why have both?)

-- 
`He accused the FSF of being "something of a hypocrit", which
 shows that he neither understands hypocrisy nor can spell.'
   --- jimmybgood