Swapping a drive with larger one, doesnt show difference

[essg88]

I have 5 x 2TB drives. I swapped one out with a 3TB drive following the guides and all. I let it resilver and even performed a scrub. I had to add some sysctls value's to allow the swap to occur and upgraded my zfs pool version.

I am still showing the same amount of storage I had previously, instead of the extra TB I was expecting. Is there anything else I can do?

 

[joeschmuck]

You should read the user guide a little closer. Your pool will automatically expand once you have upgraded all drives to 3TB. The reason is, you cannot strip the data across all drives equally.

 

[cyberjock]

This topic is covered in my noobie guide. Feel free to take this opportunity to give it a read.

 

[joeschmuck]

I have read it and I enjoyed it ;). Of course I know you were not talking to me but I did take a snow day today so my mind is drifting like the snow is. It's Spring! I need warmth. Later, time to shovel a little move as the street plow is coming to fill my driveway.

 

[DrKK]

I think CJ was talking to the OP, sir.

Your additional space will *ONLY* become live when *ALL* drives have been upgraded.

 

[essg88]

Thank you guys got it lol. I'll read more carefully. Hoping I can find something on moving these to a new system now without losing data.

Sent from my Nexus 5 using Tapatalk

 

[Yatti420]

Suggest you read all the documentation :) It's important!..

 

[DrKK]

Thank you guys got it lol. I'll read more carefully. Hoping I can find something on moving these to a new system now without losing data.

Sent from my Nexus 5 using Tapatalk

Generally speaking, in a vdev, each drive has the effective size of the smallest size drive in the vdev. Thus, in terms of storage space, 2+2+2+3 is the same as 2+3+3+3 is the same as 2+2+2+2. It's only when the GLOBAL MINIMUM size has incremented that the vdev itself will have more effective storage space. This is just how ZFS works.

But, this feature is nice, because if you wanted upgrade your pool from 4x2TB drives to 4x3TB drives, for example, you can do it one drive at a time. After the 4th drive is done, BAM, the storage space goes up.

 

[essg88]

Thanks a lot guys. Lots of good info here thats for sure!