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host utilities, suse linux enterprise server 15 sp3, suse, linux, 15 sp3, netapp, ontap
Describes how to use SUSE Linux Enterprise Server 15 SP3 with ONTAP

Use SUSE Linux Enterprise Server 15 SP3 with ONTAP

You can use the ONTAP SAN host configuration settings to configure SUSE Linux Enterprise Server 15 SP3 with ONTAP as the target.

SAN Booting

What you’ll need

If you decide to use SAN booting, it must be supported by your configuration. You can use the NetApp Interoperability Matrix Tool to verify that your OS, HBA, HBA firmware and the HBA boot BIOS, and ONTAP version are supported.

Multipathing

For SUSE Linux Enterprise Server 15 SP3 the /etc/multipath.conf file must exist, but you do not need to make specific changes to the file. SUSE Linux Enterprise Server 15 SP3 is compiled with all settings required to recognize and correctly manage ONTAP LUNs.

# multipath -ll
3600a09803831347657244e527766394e dm-5 NETAPP,LUN C-Mode
size=80G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 alua' wp=rw
`-+- policy='service-time 0' prio=50 status=active
  |- 3:0:7:9    sdco 69:192  active ready running
  |- 3:0:8:9    sddi 71:0    active ready running
  |- 14:0:8:9   sdjq 65:320  active ready running
  `- 14:0:7:9   sdiw 8:256   active ready running
# multipath -ll
3600a09803831347657244e527766394e dm-5 NETAPP,LUN C-Mode
size=80G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 3:0:3:0    sdd  8:48    active ready running
| |- 3:0:4:0    sdx  65:112  active ready running
`-+- policy='service-time 0' prio=10 status=enabled
  |- 14:0:2:0   sdfk 130:96  active ready running
  `- 14:0:5:0   sdgz 132:240 active ready running

Recommended Settings

SUSE Linux Enterprise Server 15 SP3 OS is compiled to recognize ONTAP LUNs and automatically set all configuration parameters correctly for both ASA and non-ASA configuration.

Parameter Setting

detect_prio

yes

dev_loss_tmo

"infinity"

failback

immediate

fast_io_fail_tmo

5

features

"2 pg_init_retries 50"

flush_on_last_del

"yes"

hardware_handler

"0"

no_path_retry

queue

path_checker

"tur"

path_grouping_policy

"group_by_prio"

path_selector

"service-time 0"

polling_interval

5

prio

"ontap"

product

LUN.*

retain_attached_hw_handler

yes

rr_weight

"uniform"

user_friendly_names

no

vendor

NETAPP
Example

The following example shows how to correct an overridden default. In this case, the multipath.conf file defines values for path_checker and no_path_retry that are not compatible with ONTAP LUNs. If they cannot be removed because of other SAN arrays still attached to the host, these parameters can be corrected specifically for ONTAP LUNs with a device stanza.

defaults {
   path_checker      readsector0
   no_path_retry      fail
}
devices {
   device {
      vendor         "NETAPP  "
      product         "LUN.*"
      no_path_retry     queue
      path_checker      tur
   }
}

Known issues

There are no known issues for the SUSE Linux Enterprise Server 15 SP3 with ONTAP release.