Hi, I reproduced the situation. There is a workaround with the new packages, check the las few steps below.
Steps: I installed a new PVE 3.4 from iso. Changed the pve repository to pve-no-subscription and did an apt-get update, apt-get dist-upgrade kernel and zfs got upgraded, including newly generated initramfs images reboot tried to create a new pool using new drives -> zpool create -o ashift=12 -f tank2 mirror ata-VBOX_HARDDISK_VB1da9b627-78ce7cfc ata-VBOX_HARDDISK_VB33d82a74-c68d4c2e mirror ata-VBOX_HARDDISK_VB747687a6-65a6e895 ata-VBOX_HARDDISK_VBb90fec86-d12f314e cannot create 'tank2': invalid argument for this pool operation specified an old format: zpool create -o ashift=12 -o version=28 -f tank2 mirror ata-VBOX_HARDDISK_VB1da9b627-78ce7cfc ata-VBOX_HARDDISK_VB33d82a74-c68d4c2e mirror ata-VBOX_HARDDISK_VB747687a6-65a6e895 ata-VBOX_HARDDISK_VBb90fec86-d12f314e -> it worked pool: tank2 state: ONLINE status: The pool is formatted using a legacy on-disk format. The pool can still be used, but some features are unavailable. action: Upgrade the pool using 'zpool upgrade'. Once this is done, the pool will no longer be accessible on software that does not support feature flags. scan: none requested config: NAME STATE READ WRITE CKSUM tank2 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 ata-VBOX_HARDDISK_VB1da9b627-78ce7cfc ONLINE 0 0 0 ata-VBOX_HARDDISK_VB33d82a74-c68d4c2e ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 ata-VBOX_HARDDISK_VB747687a6-65a6e895 ONLINE 0 0 0 ata-VBOX_HARDDISK_VBb90fec86-d12f314e ONLINE 0 0 0 I tried to upgrade the new pool: zpool upgrade tank2 This system supports ZFS pool feature flags. Successfully upgraded 'tank2' from version 28 to feature flags. Enabled the following features on 'tank2': async_destroy empty_bpobj lz4_compress spacemap_histogram enabled_txg hole_birth extensible_dataset embedded_data bookmarks cannot set property for 'tank2': invalid argument for this pool operation creating new "filesystems" under tank2 is working reboot -> surprise -> tank 2 started using sdg/sdh etc. instead of their IDs still got cannot set property for 'tank2': invalid argument for this pool operation on zpool upgrade zpool destroy tank2 is working creating tank2 without -o version=28 failed again creating tank2 with -o version=28 is working So, at this moment that's all. I will check it later. Bye, István > > > > > > > > > >
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