Re: Thinking of using ZFS/FBSD for a backup system

aslam_mohamed_at_wordbank.com wrote:
> Something interesting, I just slot couple of 1TB SATA in to the same 
> FreeBSD machine and re-created the zfs pool (this is just to make sure 
> that without firewire the ZFS can  work well in FeeBSD) . When I reboot 
> the machine I see the following appears on booting... This is the same 
> thing appeared before with Firewire!!
> 
> ad4: 76324MB <HDS728080PLA380 40Y9028LEN PF2OA65A> at ata2-master SATA150
> ad8: 953869MB <Seagate ST31000340NS SN05> at ata4-master SATA150
> ad10: 953869MB <Seagate ST31000340NS SN05> at ata5-master SATA150
> **GEOM: ad8: corrupt or invalid GPT detected.**
> **GEOM: ad8: GPT rejected -- may not be recoverable.**
> **GEOM: ad10: corrupt or invalid GPT detected.**
> **GEOM: ad10: GPT rejected -- may not be recoverable.**
> SMP: AP CPU #1 Launched!
> Trying to mount root from ufs:/dev/ad4s1a
> WARNING: ZFS is considered to be an experimental feature in FreeBSD.
> ZFS filesystem version 6
> ZFS storage pool version 6
> 
> Now I am running Rsync to backup all the file servers and it had done up 
> to 1TB without complaining.. Currently, the Zpool status looks pretty OK..
> 
>   pool: backup
>  state: ONLINE
>  scrub: none requested
> config:
> 
>         NAME        STATE     READ WRITE CKSUM
>         backup      ONLINE       0          0              0
>           ad8       ONLINE          0            0             0
>           ad10      ONLINE        0           0              0
> 
> errors: No known data errors
> 
> I don't know in the future there will be any issue because of this Geom 
> messages... is there any known problem like zfs/geom/gpt 
> incompatibility?.. is it the ZFS causing this error(!) messages?..any 
> thoughts?...

It does not have anything to do with ZFS.  GEOM is at a lower layer than 
ZFS is.  The messages *may* be harmless but you should investigate 
further.  Presumably you did the GPT configuration yourself - you should 
verify or redo it.

Kris