Failed, but "md: cannot remove active disk..."

Hey,

I've a weird issue with a RAID6 setup, /proc/mdstat says:

md126 : active raid6 sda1[3] sdh1[6] sdg1[0](F) sdf1[5] sdi1[1] sdc[8] sdb[7]
      9767559680 blocks super 1.2 level 6, 512k chunk, algorithm 2 [7/6] [_UUUUUU]

So sdg1 is (F)ailed, yet `mdadm --remove` yields:

md: cannot remove active disk sdg1 from md126 ...

in dmesg...

`mdadm --examine` shows:

/dev/sdg1:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : ff9e032c:446ed0bd:fc9473f3:f8e090ed
           Name : media:store  (local to host media)
  Creation Time : Tue Sep 13 21:36:43 2011
     Raid Level : raid6
   Raid Devices : 7

Avail Dev Size : 3907024896 (1863.01 GiB 2000.40 GB)
     Array Size : 19535119360 (9315.07 GiB 10001.98 GB)
  Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB)
    Data Offset : 2048 sectors
   Super Offset : 8 sectors
          State : clean
    Device UUID : 4bcee8e2:709419b6:fbeb3a8e:5c9bb68a

    Update Time : Sat May 12 21:57:27 2012
       Checksum : ffb03189 - correct
         Events : 304564

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : AAAAAAA ('A' == active, '.' == missing)

So that superblock thinks it's active, but that's normal, right? It
wasn't updated due to fail? Others correctly show:

dev/sdc:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : ff9e032c:446ed0bd:fc9473f3:f8e090ed
           Name : media:store  (local to host media)
  Creation Time : Tue Sep 13 21:36:43 2011
     Raid Level : raid6
   Raid Devices : 7

 Avail Dev Size : 3907027120 (1863.02 GiB 2000.40 GB)
     Array Size : 19535119360 (9315.07 GiB 10001.98 GB)
  Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB)
    Data Offset : 2048 sectors
   Super Offset : 8 sectors
          State : clean
    Device UUID : b713fd2b:eef145b0:ce91de0a:9077554b

    Update Time : Sat May 12 21:57:57 2012
       Checksum : 80345876 - correct
         Events : 304581

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 2
   Array State : .AAAAAA ('A' == active, '.' == missing)

Any ideas?

Cheers,
-- 
Michał Sawicz [off-list ref]