system migration

[tkempf]

hi,
i setup truenas core 12 last October to replace a storage server.
The plan was to bring Truenas up on an interim system, with an external 16disk 8GB sas jbod-enclosure, so i could play a little with it and get familiar to Truenas and the underlying Freebsd (up to now, i'm more a Linux-user). When the system was stable enough, i copied the data from the old (and designated new) server
to the interim machine.

Now the time has come, and i want to migrate the system back to the final hardware which has a 16disk sas enclosure too equipped with 8 4GB sas disks.
plan is to do it the following way :

- export pool on interim system
- attach external enclosure to new system
- import pool on the new system

Now i have a couple of questions before making stupid things...

- Do i have to care about the different drive numbers because the new hardware has aleady drives number da0-da8 from the internal enclosure?

- The interim System has an optane slog-device for the pool beeing concerned. Should i remove it from pool configuration before importing the pool on the new system without slog-device?

- Is it worth trying to copy configuration from the interim system to the new one, even when they have different hardware (i.e 4 NICs instead of 2, no SLOG ...)
or would you recommend starting the system configuration over from scratch for the new Server.

Befor you ask, i do have a backup of the enclosure, but i'd prefer not doing it the hard way

I 'd be really thankful if someone could comment on this and tell me, if i'm on the way to loosing my data, when doing it this way...
TIA
Tom

 

[sretalla]

- Do i have to care about the different drive numbers because the new hardware has aleady drives number da0-da8 from the internal enclosure?

No, not important (gptid is used to identify drives/partitions involved in a pool)

- The interim System has an optane slog-device for the pool beeing concerned. Should i remove it from pool configuration before importing the pool on the new system without slog-device?

Remove it before exporting the pool, but yes.

- Is it worth trying to copy configuration from the interim system to the new one, even when they have different hardware (i.e 4 NICs instead of 2, no SLOG ...)
or would you recommend starting the system configuration over from scratch for the new Server.

Depends on the complexity of your config... just a couple of shares probably not worth it, just re-do, but if it's a lot, there would be benefit in keeping the config and just changing network settings if necessary. (forget the SLOG as you will remove it from the pool before saving the config... and it isn't in the config in any case, SLOG is defined in the pool itself).

I 'd be really thankful if someone could comment on this and tell me, if i'm on the way to loosing my data, when doing it this way...

Losing data should not be on the cards here, just take care when handling the drives.