On Fri, 29 Jan 2010 14:54:21 +0000
"Trela, Maciej" <Maciej.Trela@xxxxxxxxx> wrote:
> +static void *raid10_takeover_raid0(mddev_t *mddev)
> +{
> + mdk_rdev_t *rdev;
> +
> + if (mddev->degraded > 0)
> + {
> + printk(KERN_ERR "error: degraded raid0!\n");
> + return ERR_PTR(-EINVAL);
> + }
> +
> + /* Update slot numbers to obtain
> + * degraded raid10 with missing mirrors
> + */
> + list_for_each_entry(rdev, &mddev->disks, same_set) {
> + rdev->raid_disk *= 2;
> + }
> +
> + /* Set new parameters */
> + mddev->new_level = 10;
> + /* new layout: far_copies = 1,
> + near_copies = raid0->raid_disks */
> + mddev->new_layout = (1<<8) + mddev->raid_disks;
> + mddev->delta_disks = mddev->raid_disks;
> + mddev->degraded = mddev->raid_disks;
> + mddev->raid_disks *= 2;
You are confusing raid_disk with near_copies. They are very different things.
Presumably you want to make 'near_copies' always be 2.
NeilBrown
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