pool isn't mounting: Dataset does not exist

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pool isn't mounting: Dataset does not exist

Post by professor » Thu Apr 25, 2013 4:47 am

Hey :)

I run CE 1.1.1 and created sucessfully a pool Raid 0 of two disks on USB. Everything went fine, created filesystems as well.

But now the pool isn't mounting upon restart or on boot.

zfs mount gives: cannot open pool: dataset does not exist.
zpool import gives: no such pool available.

I am lost. Anyone with a solution as how to access the pool again?

Thanks, Professor©

Update: upon reboot I get the message from OSX to initialize the drive or ignore it
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Re: pool isn't mounting: Dataset does not exist

Post by grahamperrin » Fri Apr 26, 2013 2:13 pm

Hi, welcome to the forum. Please paste, as code, Terminal output from the following commands:

Code: Select all
sw_vers
ls -l /Volumes
ls -l /dev/dsk
ls -l /var/zfs/dsk
diskutil list
diskutil coreStorage list
zpool upgrade
zfs upgrade
sudo zpool import


What model is the Mac?

USB 2.0 or 3.0? How are the USB connections made – direct to the Mac, or through a hub?

Is each drive on a separate bus?

What makes and models are the two drives?
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Re: pool isn't mounting: Dataset does not exist

Post by professor » Sun Apr 28, 2013 12:11 pm

Hey :-)

Here are my specs:

I am running 10.8.3 Mountain Lion on a Mac Mini Server Mid2010, IntelCore Duo 2.66 GHz with 8GB Ram. As external I have an USB 2.0 Rack with 3 Wester Digital 2 TB HD and a 1.5 TB Seagate. Two of the Western Digital drives were combined in a Raid 0-Pool.

In the meantime I had formatted the drives again, created a new pool and restored files from backup. So far no problem. I will report, if it happens again.
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