14.2 NSS Errors When Linux Multipath Is Not Configured

If you have not started multipathing before you attempt to configure NSS pools or volumes, NSS cannot resolve the multiple paths and attempts the command on all the paths. You get the following error:

Error 21621: zERR_MSAP_POOL_ALREADY_IN_USE.

After you have configured Linux multipathing for a device, the multipath device appears in NSSMU or iManager.