Single disk error and I cannot create disk with RAID

[WhiteTiger]

I am creating a Proxmox server for the first time.

The server has six 160GB disks.
Two disks are on an Adaptec controller, but already at Debian installation they are seen only as separate disks and not mirrored.
So, Proxmox was installed on one disk (sdb) and the other (sdc) was not used.

The other 4 disks are managed in RAID5 by a second Adaptec controller. It is seen as disk sda.

In the Web Console:
When I create a ZFS disk on the single disk (sdc), the note "ZFS is not compatible with disks backed by a hardware RAID controller" appears at the bottom.
I don't see the way to create it with another File System, ext4 for example.
After creating it I don't find a way to remove it.
I removed it from the DataCenter/Storage, but it is always present in the "server"/Disks

If then I try to create an LVM Group on sda (the logical disk created by the controller with the other 4 disks) there are no available disks.

 

[wolfgang]

Hi,

there is no way to destroy/remove filesystems on the GUI.
You have to remove it over the commandline.

I don't see the way to create it with another File System, ext4 for example.

You can create a filesystem like ext3, ext4, and xfs on the GUI if you have an unused disk.
Datacenter -> Nodename -> Disks -> Directory there is a Button with called "Create: Directory"