Unable to create zfs zpool in FreeBSD 8.2: no such pool or dataset

UNIX BSD
1

I am trying to test simple zfs functionality on a FreeBSD 8.2 VM. When I try to run a 'zpool create' I receive the following error:

[root@vm-fbsd82-64 /]# zpool create zfspool /dev/da0s1a
cannot create 'zfspool': no such pool or dataset

[root@vm-fbsd82-64 /]# zpool create zfspool /dev/da0
cannot create 'zfspool': no such pool or dataset

I was not sure what to put for the device, so I tried both da0s1a and da0, due to this output:

[root@vm-fbsd82-64 /]# egrep 'da[0-9]' /var/run/dmesg.boot
da0 at mpt0 bus 0 scbus0 target 0 lun 0
da0: <VMware Virtual disk 1.0> Fixed Direct Access SCSI-2 device
da0: 320.000MB/s transfers (160.000MHz, offset 127, 16bit)
da0: Command Queueing enabled
da0: 204800MB (419430400 512 byte sectors: 255H 63S/T 26108C)
Trying to mount root from ufs:/dev/da0s1a
da0 at mpt0 bus 0 scbus0 target 0 lun 0
da0: <VMware Virtual disk 1.0> Fixed Direct Access SCSI-2 device
da0: 320.000MB/s transfers (160.000MHz, offset 127, 16bit)
da0: Command Queueing enabled
da0: 204800MB (419430400 512 byte sectors: 255H 63S/T 26108C)
Trying to mount root from ufs:/dev/da0s1a
da0 at mpt0 bus 0 scbus0 target 0 lun 0
da0: <VMware Virtual disk 1.0> Fixed Direct Access SCSI-2 device
da0: 320.000MB/s transfers (160.000MHz, offset 127, 16bit)
da0: Command Queueing enabled
da0: 204800MB (419430400 512 byte sectors: 255H 63S/T 26108C)
Trying to mount root from ufs:/dev/da0s1a

Just wondering if I am missing a step or doing something wrong.
edit: I'm starting to wonder if it's because I only have 1 'disk' in this VM, and perhaps the entire disk has been formatted to ufs and so I can't create a zpool on that disk? Do I need to add another disk in VMware?

Also, does anyone know what filesystems are natively supported in FBSD 6.x and 8.x? I believe 6.x supports ufs and 8.x supports ufs and zfs, but I am not positive.

Thank you for any help

2

ZFSQuickStartGuide - FreeBSD Wiki

1 Like
3

I found my problem: I only had one disk, and I guess it was entirely allocated to my existing ufs filesystem. Once I added a new disk, I was able to specify it as the device and I was able to successfully create a zpool/zfs filesystem:

[root@vm-fbsd82-64 ~]# egrep 'da[0-9]' /var/run/dmesg.boot
da0 at mpt0 bus 0 scbus0 target 0 lun 0
da0: <VMware Virtual disk 1.0> Fixed Direct Access SCSI-2 device

da1 at mpt0 bus 0 scbus0 target 1 lun 0
da1: <VMware Virtual disk 1.0> Fixed Direct Access SCSI-2 device

[root@vm-fbsd82-64 ~]# zpool create zfspool /dev/da1
[root@vm-fbsd82-64 ~]# zfs create zfspool/test-zfs
[root@vm-fbsd82-64 ~]# df
Filesystem                         1K-blocks        Used     Avail Capacity  Mounted on
zfspool                              10257328         21  10257307     0%    /zfspool
zfspool/test-zfs                     10257328         21  10257307     0%    /zfspool/test-zfs

Thank you for the link.

4

ZFS is a combined file system and logical volume manager originally designed by Sun Microsystems. It was ported to FreeBSD and has been part of the operating system since FreeBSD 7.0. FreeBSD 6.x use UFS.

The Z File System