Storage information

[hetSein]

Can somebody please explain to me how I should read the given data in Storage->Volumes.
I have a total of 4x2TB disks in a Z1 raid, which should give approx. 6TB, which it does. My data01 volume has 4.4 TiB used and 2.8 TiB available. This is the part I understand :)

But, my dataset data01 has 4.7 TiB used and 378 GiB available?
Next I created a zvol for vmware of 1.5 TiB and it has 1.9 TiB available?

The thing I wonder most is the data01 dataset having 378.3 GiB available, where I expect 2.8 TiB.
Can I check / manage this (from the command prompt maybe)?
How should I read this data?

 

[Robert Trevellyan]

Approximately ... the first line shows raw storage without RAIDZ1 overhead. The second line shows available storage with overhead. In other words, your pool is almost full (it says 92% under Used). And recognize the difference between TB and TiB.

 

[hetSein]

Thanks, can I reduce the overhead in any manner?

 

[hetSein]

Oh, wait, I didn't do my maths ;)
The first line gives 7.4 TiB ( which can be matched to 8 GB)
The second lines gives a total approx 5TiB (which can be matched with the 6GB)

I misinterpreted these numbers, but now I got it :D

And in that case, of course the overhead can't be reduced, it is the extra disk used for the RAID :D

Thanks, extra disk are coming in today :)

 

[Robert Trevellyan]

Thanks, extra disk are coming in today :)

Keep in mind that you can't simply add disks to a vdev (but you can add vdevs to a pool). Depending on your goal, you may need to copy your data elsewhere, then destroy and recreate your pool. Make sure you read @cyberjock 's presentation before proceeding.