On Tue, Aug 25, 2020 at 12:51:02PM -0400, Josef Bacik wrote:
> 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 <jo...@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
