Trouble when growing a raid5 array

[Jacob Schmidt Madsen <jacob@mungo.dk>]

Hey

I bought 2 new disks to be included in a big raid5 array.

I executed:
# mdadm /dev/md5 -a /dev/sdh1
# mdadm /dev/md5 -a /dev/sdi1
# mdadm --grow /dev/md5 --raid-disks=8

After 12 hours it stalled:
# cat /proc/mdstat
md5 : active raid5 sdc1[6] sdb1[7] sdi1[3] sdh1[2] sdg1[1] sdf1[0] sde1[4] 
sdd1[5]
      1562842880 blocks super 0.91 level 5, 64k chunk, algorithm 2 [8/8] 
[UUUUUUUU]
      [===================>.]  reshape = 98.1% (306783360/312568576) 
finish=668.7min speed=144K/sec

Its been stuck at 306783360/312568576 for hours now.

When i check the kernel log it is full of "compute_blocknr: map not correct".

I guess something went really bad? If someone know what is going on or if 
someone know what i can do to fix this.
I would really be sad if all the data was gone.

Thanks!