Re: [PATCH] btrfs-progs: add a warning label for RAID5/6
From: David Sterba <hidden>
Date: 2021-03-04 00:20:26
On Tue, Aug 25, 2020 at 12:51:02PM -0400, Josef Bacik wrote:
quoted hunk ↗ jump to hunk
We all know there's some dark and scary corners with RAID5/6, but users may not know. Add a warning message in mkfs so anybody trying to use this will know things can go very wrong. Signed-off-by: Josef Bacik <josef@toxicpanda.com> --- mkfs/main.c | 2 ++ 1 file changed, 2 insertions(+)diff --git a/mkfs/main.c b/mkfs/main.c index 0a4de617..0db24ad4 100644 --- a/mkfs/main.c +++ b/mkfs/main.c@@ -1183,6 +1183,8 @@ int BOX_MAIN(mkfs)(int argc, char **argv) if ((data_profile | metadata_profile) & (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) { features |= BTRFS_FEATURE_INCOMPAT_RAID56; + warning("RAID5/6 support is still experimental and has known " + "issues, do not rely on this for data you care about.\n");
I've reworded the message, calling it experimental after so many years is a bit kappa. Also we'll need something in the docs for reference, I'll write something.
} if ((data_profile | metadata_profile) & -- 2.24.1