Re: zfs question

On Sat, 14 Dec 2024, at 05:29, Rick Summerhill wrote:
> I have a simple question about zfs.  I have a 4x4T zfs raidz1 array that 
> has worked perfectly for years.  Recently, a disk in the array went bad, 
> so I replaced it with a spare 8T drive that I had on hand.  My 
> understanding is that that the array would only use 4T of that drive, 
> and moreover, that would be true even if I had to replace two more 
> drives with 8T disks.  However, if I replaced the last drive with an 8T 
> disk, so all the disks were now 8T, would the array use all the of the 
> 8T on each of the drives, or still be a 4x4T array?

It is not an automatic process, but yes. It turns out I wrote this up
last week, albeit for a mirrored zpool, the steps are the same.

https://people.freebsd.org/~dch/posts/2024-12-05-openzfs-inplace-expansion/

There is also a growfs service that may do most of this automagically for you,
so long as the pool is set to autoexpand.

A+
Dave