They belong same family and share FW:
https://downloads.dell.com/manuals/common/md32xx_md36xx_supportmatrix2_en-us.pdf

The main differences are:
MD3200   6 Gbps direct attached SAS storage array with 12 drives (3.5 inch)
MD3220   6 Gbps direct attached SAS storage array with 24 drives (2.5 inch)
MD3260   6 Gbps direct Attached SAS storage dense array
MD3200i  1 Gbps iSCSI network storage array with 12 drives (3.5 inch)
MD3600i 10 Gbps iSCSI network storage array with 12 drives (3.5 inch)
MD3220i  1 Gbps iSCSI network storage array with 24 drives (2.5 inch)
MD3620i 10 Gbps iSCSI network storage array with 24 drives (2.5 inch)
MD3260i  1 Gbps iSCSI network storage dense array
MD3660i 10 Gbps iSCSI network storage dense array
MD3600f  8 Gbps fibre channel network storage array with 12 drives (3.5 inch)
MD3620f  8 Gbps fibre channel network storage array with 24 drives (2.5 inch)
MD3660f  8 Gbps fibre channel network storage dense array

A mandatory ACK from Hannes is required, as he was reluctant to unify them.

Cc: Hannes Reinecke <[email protected]>
Cc: Christophe Varoqui <[email protected]>
Cc: device-mapper development <[email protected]>
Signed-off-by: Xose Vazquez Perez <[email protected]>
---
 libmultipath/hwtable.c | 21 +++------------------
 1 file changed, 3 insertions(+), 18 deletions(-)

diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
index a8dc0de..031102c 100644
--- a/libmultipath/hwtable.c
+++ b/libmultipath/hwtable.c
@@ -735,7 +735,7 @@ static struct hwentry default_hw[] = {
         * DELL
         */
        {
-               /* DELL MD3000/MD3000i */
+               /* DELL MD3000 */
                .vendor        = "DELL",
                .product       = "MD3000",
                .bl_product    = "Universal Xport",
@@ -750,24 +750,9 @@ static struct hwentry default_hw[] = {
                .prio_args     = NULL,
        },
        {
-               /* DELL MD32xx/MD32xxi */
+               /* DELL MD32xx/MD36xx */
                .vendor        = "DELL",
-               .product       = "MD32xx",
-               .bl_product    = "Universal Xport",
-               .features      = "2 pg_init_retries 50",
-               .hwhandler     = "1 rdac",
-               .pgpolicy      = GROUP_BY_PRIO,
-               .pgfailback    = -FAILBACK_IMMEDIATE,
-               .rr_weight     = RR_WEIGHT_NONE,
-               .no_path_retry = 15,
-               .checker_name  = RDAC,
-               .prio_name     = PRIO_RDAC,
-               .prio_args     = NULL,
-       },
-       {
-               /* DELL MD36xxi/MD36xxf */
-               .vendor        = "DELL",
-               .product       = "MD36xx(i|f)",
+               .product       = "MD32xx|MD36xx",
                .bl_product    = "Universal Xport",
                .features      = "2 pg_init_retries 50",
                .hwhandler     = "1 rdac",
-- 
2.5.5

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