From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yi Zhang Subject: [PATCH] Grow: analyse_change add notification about only 2-device can be convert from RAID1 to RAID5 Date: Fri, 11 Mar 2016 17:26:40 +0800 Message-ID: <1457688400-12666-1-git-send-email-yizhan@redhat.com> Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org Cc: Jes.Sorensen@redhat.com, neilb@suse.com, shli@kernel.org, xni@redhat.com, Yi Zhang List-Id: linux-raid.ids Notify "Can only convert a 2-device array to RAID5" instead of "Impossibly level change request for RAID1" when convert from RAID1 to RAID5 if the disk num is not equal two like RAID4/5->RAID1 did. Signed-off-by: Yi Zhang --- Grow.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Grow.c b/Grow.c index cf2750a..4e2fc08 100755 --- a/Grow.c +++ b/Grow.c @@ -1077,6 +1077,9 @@ char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re) re->level = 1; return NULL; } + if (info->array.raid_disks != 2 && + info->new_level == 5) + return "Can only convert a 2-device array to RAID5"; if (info->array.raid_disks == 2 && info->new_level == 5) { -- 2.5.0