I use with no problem at all TrueNAS CORE on 6 HPE Apollo 4200 since more than 18 months. Very happy !
I migrate 3 of 6 HPE Apollo 4200 from CORE to SCALE with no problem : boot from ISO image and restore of the SQLITE database. Great process !
But I loose two tips used on CORE
1/ with SNMP request, I don’t find any information to evaluate the pool ratio capacity.
In CORE, I did something like
CAPACITY=snmpget -v 1 -c public $filer FREENAS-MIB::zpoolSize.2 | sed 's/^.*INTEGER: //'
USED=snmpget -v 1 -c public $filer FREENAS-MIB::zpoolUsed.2 | sed 's/^.*INTEGER: //'
How can I do in SCALE ?
2/ I use many ZFS ACL on datasets to filter the access through SMB. In CORE, the command “getfacl” shows the ACL
Regarding SNMP, you need to research whether SNMP is provided as standard in TrueNAS Scale, and what MIBs are provided as standard by Debian (most likely) or TrueNAS Scale (much less likely IMO).
Regarding getting pool size via SNMP, this is currently not supported on truenas scale. There is an active feature request titled Extend SCALE SNMP for this.