On Mon, 4 Jun 2012 09:53:21 +0800 majianpeng <majianpeng@xxxxxxxxx> wrote:
> Hi:
> At present, md is supporting replacement.
> In function: state_store()
> > } else if (cmd_match(buf, "replacement")) {
> > /* Can only set a device as a replacement when array has not
> > * yet been started. Once running, replacement is automatic
> > * from spares, or by assigning 'slot'.
> > */
> I can using spare disk.But how to use slot?
If you want to ensure that a particular device becomes a replacement for a
particular other device, then
cd /sys/block/mdX/md
echo frozen > sync_action
echo NN:MM > new_dev # where NN is major and MM is minor of new device
echo want_replacement > rdSS/state # where SS is slot number of device to
# replace
echo SS > dev-YYY/slot # where YYY is the kernel name of the newly added
# device
echo idle > sync_action
should do it, but I haven't tested recently.
NeilBrown
> > if (rdev->mddev->pers)
> > err = -EBUSY;
>
>
>
> --------------
> majianpeng
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