Recover Replaced disks

[fostersimported]

HI All,

I have had my system running for 5 years. I have a ZFS pool Raidz1 x3 2TB WD Green disks. Apart from the the pool getting full, there were some SMART Errors so I replaced one disk at a time with a 4TB.

All was well until today where the system would not boot. one of the disks was causing a DMA error.

I want to recover the original disks. I have plugged them all in but the auto import does not work.

How to I import the 3 original disks ?

Cheers

[kenZ71]

If your trying to swap out one 4TB for a 2TB it won't work as ZFS will grow but not shrink.

If you pull all 4TB you might be able to import the pool from the 2TB but your data will be stale. Might be better to run the pool degraded for a few days until the failed drive is replaced.

[fostersimported]

HI
I just want to reinstate the original disks (put the system back to what it was) before i replaced the disks.

The original setup was x3 RAIDZ1 2TB drives.

I removed one 2TB disk at a time replaced it with a 4TB Disk and replaced the disk in the GUI.
Once all three disks had been replaced I scrubed the pool, it was at this point one of the new 4TB drives failed (current pending sector over 300!)

So I pulled the 4TB drives and put the original 2TB back. But when I import the pool Nas4free does not find it.

How do I import the pool / disks ? I only have today to get it back online before i go away so no time to get another 4TB drive.
Cheers

[sleid]

zpool import -F nameofmypool

[fostersimported]

Hi,

I backed up my config and have started from a clean setup. The original disks have been imported through 'HDD Managment'

But I cannot import the pool:

Code: Select all

nas4free: /# zpool import -F Zeus_Pool
cannot import 'Zeus_Pool': no such pool available

What next ? The data must still be on the disks as they were not plugged in to the system when they were replaced.
Thanks

[sleid]

zpool import
Should list the pools found regardless of their status.

[fostersimported]

I know, that's what i cannot understand.
Is there any way to interrogate each disk to find out the status. Also when happens to the pool information when you run the replace command?

[sleid]

I have no other solution to offer you.

I have read your problem from the beginning.
You can not go back with the original hard drives because the ZFS data has been changed every time you change the hard disk.
The first 2 Tb hard drive changed has a zfs configuration with a configuration of 3 hard disks of 2 Tb
The second 2 Tb disk changed to a configuration with 2 hard disks of 2 Tb and one of 4 Tb
The third disk of 2 Tb has a configuration of 1 hard disk of 2 Tb and 2 of 4 Tb.
This gives 3 pool configuration so impossible to recover.
The only solution is to change the 4 Tb out of use to give life to the pool, besides you can unplug it and continue to use your nas but with a pool zfs degraded.

[fostersimported]

Thanks for your support,

I purchased another drive in the end.

Cheers