From 9fc2bcb6f555c3f3693c334c12bd0878fbe17202 Mon Sep 17 00:00:00 2001 From: dann frazier Date: Wed, 18 Dec 2019 07:29:30 -0700 Subject: [PATCH] UBUNTU: SAUCE: md/raid0: Link to wiki with guidance on multi-zone RAID0 layout migration BugLink: https://bugs.launchpad.net/bugs/1850540 Helping an administrator understand this issue and how to deal with it requires more text than achievable in a kernel error message. Let's clarify the issue in the Ubuntu wiki, and have the kernel emit a link to it. I've submitted a similar change upstream: https://marc.info/?l=linux-raid&m=157360088014027&w=2 Should it get merged, we should consider replacing this patch with that one. Otherwise, it is probably safe to drop this SAUCE patch after focal. Signed-off-by: dann frazier Acked-by: Stefan Bader Acked-by: Marcelo Henrique Cerri Signed-off-by: Seth Forshee --- drivers/md/raid0.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index c50a7abda744..82738a1a1415 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -266,6 +266,8 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf) pr_err("md/raid0:%s: cannot assemble multi-zone RAID0 with default_layout setting\n", mdname(mddev)); pr_err("md/raid0: please set raid0.default_layout to 1 or 2\n"); + pr_err("md/raid0: Read the following page for more information:\n"); + pr_err("md/raid0: https://wiki.ubuntu.com/Kernel/Raid0LayoutMigration\n"); err = -EOPNOTSUPP; goto abort; }