When raid0 expansion is restarted, mdadm refuses to correctly assemble array because critical section cannot be restored from backup file. mdadm exits with information: mdadm: Failed to restore critical section for reshape - sorry. For raid0 new level is 0, current array level is 4. Function Grow_restart() doesn't allow for level change. It should be allowed for raid0, while raid4 is reshape mid-point only. 'Native' raid0 reshape is not possible, because md doesn't support it. Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx> --- Grow.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/Grow.c b/Grow.c index d6ecde2..21531e0 100644 --- a/Grow.c +++ b/Grow.c @@ -3102,7 +3102,8 @@ int Grow_restart(struct supertype *st, struct mdinfo *info, int *fdlist, int cnt unsigned long long nstripe, ostripe; int ndata, odata; - if (info->new_level != info->array.level) + if ((info->new_level != info->array.level) && + (info->new_level != 0) && (info->array.level != 4)) return 1; /* Cannot handle level changes (they are instantaneous) */ odata = info->array.raid_disks - info->delta_disks - 1; -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
