-
Important Announcement for the TrueNAS Community.
The TrueNAS Community has now been moved. This forum has become READ-ONLY for historical purposes. Please feel free to join us on the new TrueNAS Community Forums
Can a pool have two different discs?
- Thread starter kukuruz28
- Start date
- Joined
- Jan 1, 2016
- Messages
- 9,703
A pool can have many VDEVs. A VDEV can have one or more disks.
The question you really need to ask yourself is what am I going to put in that pool and how do I want to use that?
If you're just dumping media files that are stored elsewhere (or you don't care if they are lost), then a striped pool of single-disk VDEVs is fine, which will give you the total storage capacity of the 2 disks. If you lose a single disk, all content on the pool is lost. (<<WARNING - be sure to understand that)
If you wanted to add redundancy (mirrored VDEV), you can do that (but only if you started the pool with the 80GB disk) and it will lock the capacity of the VDEV to that 80GB... sounds like not what you wanted.
you probably should just read the ZFS primer before using ZFS...
The question you really need to ask yourself is what am I going to put in that pool and how do I want to use that?
If you're just dumping media files that are stored elsewhere (or you don't care if they are lost), then a striped pool of single-disk VDEVs is fine, which will give you the total storage capacity of the 2 disks. If you lose a single disk, all content on the pool is lost. (<<WARNING - be sure to understand that)
If you wanted to add redundancy (mirrored VDEV), you can do that (but only if you started the pool with the 80GB disk) and it will lock the capacity of the VDEV to that 80GB... sounds like not what you wanted.
you probably should just read the ZFS primer before using ZFS...
I'm new to this and I don't quite understand what you're talking about,
means when I go to create a new pool
throw this out....
Is there any option for me to create a pool without two identical disks?
If there is, I would need help writing some procedure for me
means when I go to create a new pool
throw this out....
Is there any option for me to create a pool without two identical disks?
If there is, I would need help writing some procedure for me
- Joined
- Jan 1, 2016
- Messages
- 9,703
Tick the Force checkbox at the bottom (and make sure to specify a name for your pool) and you can proceed.
Understand that this creates a pool which will be entirely lost if either of the 2 disks fails.
Daisuke
Contributor
- Joined
- Jun 23, 2011
- Messages
- 1,041
Also the pool will have the size of your smallest disk, if you force it. Best way is to purchase several identical disks, from same brand and make sure you have at least one spare on hand in case of failure.
Why do you want to create a pool of two disks? What is the intended usage purpose?
- Joined
- Dec 31, 2021
- Messages
- 973
Not if it’s a striped pool.
Also the pool will have the size of your smallest disk, if you force it. Best way is to purchase several identical disks, from same brand and make sure you have at least one spare on hand in case of failure.
Why do you want to create a pool of two disks? What is the intended usage purpose?
