The issue of expanding from a single hard disk to multiple hard disks

[IceBear-huang]

Hello, I'd like to ask why when I expanded from 1 hard drive to 2 hard drives, it didn't work.
The volumes configuration I used is as follows:
volumes:
/volume2/rustfs/logs:/logs
/volume2/rustfs/new:/data/d1
/volume3/rustfs2/data:/data/d2
environment:
RUSTFS_VOLUMES=/data/d{1...2}
I used this method for expansion. Both directories are new, and when uploading files, the stored files in d1 and d2 are exactly the same. However, what I expect is expansion, meaning that the contents of d1 and d2 should not be duplicated so that more files can be stored. My two hard drives have different storage capacities: one is 3.6TB, and the other is 3.2TB.
But if I use the previously stored directory, it fails to start, with the following volumes configuration:
volumes:
/volume2/rustfs/logs:/logs
/volume2/rustfs/data:/data/d1
/volume3/rustfs2/data:/data/d2
environment:
RUSTFS_VOLUMES=/data/d{1...2}
Could you please help explain this?

[IceBear-huang]

I just want to do dynamic expansion. The storage space of the old hard disk before was not enough. Is there any way to re-segment the data from the old hard disk and put it into a new disk?

[loverustfs]

I just want to do dynamic expansion. The storage space of the old hard disk before was not enough. Is there any way to re-segment the data from the old hard disk and put it into a new disk?

Like MinIO, RustFS does not support dynamic expansion.

The fundamental concept for expansion is a pool.

[loverustfs]

@IceBear-huang ,

The minimum length of EC is 4. Therefore, you need at least 4 disks.

[IceBear-huang]

Is it okay to mount four hard disks at the same time? But if I create a new docker for rustfs, I can mount 2 hard disks or 3 hard disks again, but I want to expand from that old hard disk to 2 hard disks or 3 hard disks, but I keep booting up without success.

[IceBear-huang]

I also want to ask if I want to take out the data from my old disk and put it on the new disk. The new disk uses 4 hard disks, 3 data slice disks + 1 verification disk. What should I do? If one of my 4 hard disks breaks down in the future, can I use the erasure code principle to remove the bad disk and add a new disk as a new data slice disk? Does rustfs support such an operation? If so, what should I do? I currently failed to start the original rustfs docker project when adding new disk mounting and environment variables, which makes me very distressed