Hi!
I am trying to create my new data pool with mdadm. I had one filled 8 TB HDD with data. I bought 4 additional HDDs of the same type. I have created a RAID5 4-disk array, copied the data from first old HDD to 4-disk RAID5. After all completed, I added the old disk to RAID5 array with "grow".
The reshape was running for days and today I needed to read some data. I found in the web that I could pause the sync with "echo frozen /sys/block/md2/md/sync_action" which worked, but once I had finished, I wrote "reshape" back to "/sys/block/md2/md/sync_action". After that it looked really weird. I have now a degraded raid5 array with 6 disks. I can not write "idle" or something into "/sys/block/md2/md/sync_action".
What do you think had happened? What would you suggest to make my RAID to continue to my last reshape?
Very happy for every hint here 