RE: RAID6 and crashes (reporting back re. --bitmap)

["Graham Mitchell" <gmitch@woodlea.com>]

> I stumbled in the same way initially, but then re-read more closely and
> noticed that Neil said to run it "on some component of the array", e.g.
> /dev/sdxN, not the array itself -- and that way it worked fine. However as
my
> array sees almost no write load at the moment, I have no useful results to
> report.
> 
> --
> With respect,
> Roman
[GM> ] 

Duh.... You are correct, here's the output from one of my disks

mdadm -X /dev/sdn1
        Filename : /dev/sdn1
           Magic : 6d746962
         Version : 4
            UUID : 1470c671:4236b155:67287625:899db153
          Events : 10584
  Events Cleared : 10584
           State : OK
       Chunksize : 128 MB
          Daemon : 5s flush period
      Write Mode : Normal
       Sync Size : 488383488 (465.76 GiB 500.10 GB)
          Bitmap : 3727 bits (chunks), 0 dirty (0.0%)


Like you, I've no load on it at the moment, but I do have a couple of GB to
copy onto it today, so I'll see if I can get some more figures.

I think I need some tea...:)


G