And add recommended pgfailback value.

ALUA is supported since XIV_Gen2 and microcode 10.2.1
(All ports across all controllers in single Target Port Group)

https://www.ibm.com/support/pages/ibm-flashsystem%C2%AE-a9000-and-a9000r-hyperswap-solution-deployment-linux%C2%AE-ibm-z-systems%C2%AE
https://www.google.com/search?q=%222810XIV%22+%22path_grouping_policy%22+site%3Aibm.com

Cc: Martin Wilck <[email protected]>
Cc: Benjamin Marzinski <[email protected]>
Cc: Christophe Varoqui <[email protected]>
Cc: DM-DEVEL ML <[email protected]>
Signed-off-by: Xose Vazquez Perez <[email protected]>
---
 libmultipath/hwtable.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
index 0caac0da..72f81c60 100644
--- a/libmultipath/hwtable.c
+++ b/libmultipath/hwtable.c
@@ -712,7 +712,8 @@ static struct hwentry default_hw[] = {
                .vendor        = "(XIV|IBM)",
                .product       = "(NEXTRA|2810XIV)",
                .no_path_retry = NO_PATH_RETRY_QUEUE,
-               .pgpolicy      = MULTIBUS,
+               .pgpolicy      = GROUP_BY_PRIO,
+               .pgfailback    = 15,
        },
        {
                /* TMS RamSan / FlashSystem 710/720/810/820/840/900 */
-- 
2.32.0

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