[SOLVED] ZFS change ashift after pool creation

[fireon]

Hello,

with installed an littel PVE4 with ZFS in Raid1. Badly i've seen we have disks with the wrong sectorsize. Only 512bytes. Should we with PVEinstaller 4096bytes. So the ashift=12 is wrong for this installation. So would like to change the ashift option touring replace disk by disk. But this has no effect. I've also formated every disk, and then replace it, but nothing...

zpool replace v-machines3 sdc sda -o ashift=9 -f

So is it possibel to change this? Or only on new pool creation. With a new pool (had an testmachine), it works fine. But in this case we have only two disks.

Berst
Regards

 

[sigxcpu]

You cannot change that value on an existing pool.

 

[fireon]

You cannot change that value on an existing pool.

I had already thought.

Is it really a big problem when i use the default ashift=12 for such disk with 512bytes?

 

[sigxcpu]

As far as I know, there are usage issues with raidz. If you stick to mirrors and stripes, it is fine.

 

[fireon]

Ok, thanks. It is only an Raid1.