No unused disk but device is showing

[JonP]

I'm just getting started with Proxmox and have a USB drive attached that I wanted to create a zfs on. The device shows under "Disks" as /dev/sdb but when I go to create the zfs, it says "No unused disks" are available. In researching this, I've seen many posts on the forums about this problem, but the recommended fix (wiping the drive with something like sgdisk --zap-all) hasn't worked.

Am I missing something? Is there some sort of restriction about creating a zfs on a removable USB drive?

Any guidance or information would be greatly appreciated, and details are below. If it's important, this is running on a Dell R720

fisk -l output:

Disk /dev/sda: 29.2 GiB, 31331450880 bytes, 61194240 sectors
Disk model: Internal Dual SD
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 89C68CD0-4ECA-401F-848A-5A2307773A3B

Device       Start      End  Sectors  Size Type
/dev/sda1       34     2047     2014 1007K BIOS boot
/dev/sda2     2048  1050623  1048576  512M EFI System
/dev/sda3  1050624 61194206 60143583 28.7G Linux LVM


Disk /dev/sdb: 114.6 GiB, 123010547712 bytes, 240254976 sectors
Disk model:  SanDisk 3.2Gen1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/pve-root: 7 GiB, 7516192768 bytes, 14680064 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/pve-swap: 3.5 GiB, 3758096384 bytes, 7340032 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

pvesm status output:

Name             Type     Status           Total            Used       Available        %
local             dir     active         7159288         2385608         4390296   33.32%
local-lvm     lvmthin     active        13291520               0        13291520    0.00%

Disks listing:


Create ZFS screen:

 

[dietmar]

I'm just getting started with Proxmox and have a USB drive attached that I wanted to create a zfs on. The device shows under "Disks" as /dev/sdb but when I go to create the zfs, it says "No unused disks" are available.

Seems there is some data on that disk (Some ISO image).

 

[JonP]

Seems there is some data on that disk (Some ISO image).

Thanks @dietmar, that was it. I had previously had a boot image on it, and that seems to have stuck. A quick wipe with `dd if=/dev/zero of=/dev/sdb` did the trick. Thank you!