Mirrored vdevs
- Thread starter epicurean
- Start date
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With Napp-IT you can do it a number of ways:
- use Napp-it web GUI and create a "mirror" and then expand with more "mirror"
- use console in esxi and do it via command line
- write the command and issue it via napp-it web gui
Easiest is the Gui Point-Click Method
- use Napp-it web GUI and create a "mirror" and then expand with more "mirror"
- use console in esxi and do it via command line
- write the command and issue it via napp-it web gui
Easiest is the Gui Point-Click Method
One remark for better understanding.
With ZFS you cannot mirror vdevs. vdevs are always striped in a raid-0 manner.
In order to create a pool, you start with a vdev from mirrored disks, then you can add more vdevs to increase performance and capacity.
With ZFS you cannot mirror vdevs. vdevs are always striped in a raid-0 manner.
In order to create a pool, you start with a vdev from mirrored disks, then you can add more vdevs to increase performance and capacity.
I think all he's saying is that a pool consisting of more than one mirror (or any vdev) stripes across the vdevs. He was just clarifying to make sure you understand that in your case if you lose any of the mirrored vdevs the pool is lost.
Whether you use striped mirrors or RAIDZ3 depends on your performance needs as well as how valuable having the data available is and how many drives you can afford to lose to redundancy.
Whether you use striped mirrors or RAIDZ3 depends on your performance needs as well as how valuable having the data available is and how many drives you can afford to lose to redundancy.
It ultimately depends on how you want the pool(s) to be setup.
I suggest this to start:
19.8. ZFS Features and Terminology
Mainly it's good to know that a pool can be made up of 1 or more vdev, and when you add more they're striped. So you can have 2 raidz2 vdev striped just like you could do 2 mirrored vdev, 2 raidz3, etc...
2 raidz2 vdev with 8 disc each would work for you.
It just depends on what you want and how much disk space you can afford to 'lose'.
I suggest this to start:
19.8. ZFS Features and Terminology
Mainly it's good to know that a pool can be made up of 1 or more vdev, and when you add more they're striped. So you can have 2 raidz2 vdev striped just like you could do 2 mirrored vdev, 2 raidz3, etc...
2 raidz2 vdev with 8 disc each would work for you.
It just depends on what you want and how much disk space you can afford to 'lose'.
Would like to propose one more link for reading stuff, especially for bigger drives, 6TB, 8TB,...
ZFS: You should use mirror vdevs, not RAIDZ.
ZFS: You should use mirror vdevs, not RAIDZ.