Hi guys,
I have in my NAS 5 drives in a raidz configuration. Everything works well. But i needed some more space. So i tried to add 3 more disks in a raidz in the 5 disk raidz pool. If you do so ZFS will complain that the replication level is mismatched and that you can use -f to force the add. If i make a dry-run it should work. I was reading about ZFS mismatched replication levels on multiple sites. But there is no definitive answer about the -f usage. I would like to know your experience or why it is bad to use the force option.
One guy wrote that it is there to warn you about redundancy. If you add a single disk to a raidz pool. That you will know that you will not have any redundancy left if that disk crashes. Another guy tells you that the speed will go down the drain. And multiple tutorials will tell you that it is ok to use the -f. Solaris only tells you "it is not recommended" but no explanation why?
And other people just say don't use a force switch on a production system, force usage is BAD!
Hope that the FreeBSD community will get the answer!
With Regards,
Aron
I have in my NAS 5 drives in a raidz configuration. Everything works well. But i needed some more space. So i tried to add 3 more disks in a raidz in the 5 disk raidz pool. If you do so ZFS will complain that the replication level is mismatched and that you can use -f to force the add. If i make a dry-run it should work. I was reading about ZFS mismatched replication levels on multiple sites. But there is no definitive answer about the -f usage. I would like to know your experience or why it is bad to use the force option.
One guy wrote that it is there to warn you about redundancy. If you add a single disk to a raidz pool. That you will know that you will not have any redundancy left if that disk crashes. Another guy tells you that the speed will go down the drain. And multiple tutorials will tell you that it is ok to use the -f. Solaris only tells you "it is not recommended" but no explanation why?
And other people just say don't use a force switch on a production system, force usage is BAD!
Hope that the FreeBSD community will get the answer!
With Regards,
Aron