[dm-devel] [PATCH] libmultipath: unset detect_checker for clariion / Unity arrays

[Martin Wilck]

On Tue, 2022-06-07 at 17:45 -0500, Benjamin Marzinski wrote:
> Dell EMC would like to always use the emc_clariion checker. Currently
> detect_checker will switch the checker to TUR for Unity arrays.
> This can cause problems on some setups with replicated Unity LUNs,
> which are handled correctly the the emc_checker, but not the TUR
> checker.
> 
> Cc: vincent.chen1 at dell.com
> Signed-off-by: Benjamin Marzinski <bmarzins at redhat.com>

(while we're discussing possible alternatives)

Reviewed-by: Martin Wilck <mwilck at suse.com>

> ---
>  libmultipath/hwtable.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
> index 39daadc2..415bf683 100644
> --- a/libmultipath/hwtable.c
> +++ b/libmultipath/hwtable.c
> @@ -350,6 +350,7 @@ static struct hwentry default_hw[] = {
>                 .no_path_retry = (300 / DEFAULT_CHECKINT),
>                 .checker_name  = EMC_CLARIION,
>                 .prio_name     = PRIO_EMC,
> +               .detect_checker = DETECT_CHECKER_OFF,
>         },
>         {
>                 /* Invista / VPLEX */