Here's my documentation summary of actions. Let me know if there is anything else--any logs--I can provide. Please help!

SkyNetOps Cache Migration (500GB → 2TB) — Full Summary

Starting State

• Cache drive: 500GB SSD

• New drive: 2TB SSD

• Cache usage ~300GB (appdata, system, domains)

• Array + parity active

• Mixed SATA speeds (white = SATA III, black = SATA II)

---

1. Identified space usage on cache

You ran:

du -h --max-depth=1 /mnt/cache

Found:

• domains ~96GB

• system ~95GB

• appdata ~40GB

Confirmed what needed to be migrated

---

2. Disabled active services

To prevent file changes during migration:

• Docker → Disabled

• VM Manager → Disabled

Critical step to avoid corruption

---

3. Backups created

Backed up key data:

• system → USB 250GB drive

• domains → array (/mnt/user/backup/domains)

• appdata → already handled

Ensured recovery path before touching cache

---

4. Introduced new 2TB SSD as separate pool

Created:

• Cache → 500GB (existing)

• Cache_ → 2TB (new, initially unformatted)

---

5. Formatted the 2TB SSD

Through UI:

• Array Operation → Format

• Result:

  • Cache_ → mounted as btrfs

---

6. Copied data (SSD → SSD)

Executed:

rsync -avh --progress /mnt/cache/ /mnt/cache_/

Result:

• Full copy of:

  • appdata

  • system

  • domains

• Verified via size + structure

---

7. Observed performance characteristics

• ~260 MB/s transfer rate

• Identified cause:

  • 2TB SSD on SATA II (black port)

Hardware bottleneck, not config issue

---

8. Planned hardware optimization

Decision:

• Move 2TB SSD → white SATA (SATA III)

• Remove 500GB SSD entirely

---

9. Shutdown + hardware change

• Clean shutdown

• Removed 500GB SSD

• Re-cabled 2TB SSD

---

10. Boot issue encountered

System hung at:

Triggering udev events...

---

11. Isolation testing performed

Tested with:

• No SATA drives

• No SAS/HBA connections

• Only USB boot

Still hung.

---

13. Restoration testing performed

Tested with:

• Replaced 500GB SATA SSD into same spot.

• Replaced 2TB SATA SSD into same spot.

Still hung.

14. Safe mode testing performed

Attempt safe mode boot.

Still hung.

---

12. Unraid USB Edit

Config Fix Attempted:

• Located config/pools/ on the USB stick containing cache.cfg (pointing to the missing 500GB) and cache_.cfg (pointing to the 2TB)

• Backed up the old cache.cfg referencing the missing 500GB Samsung SSD

• Deleted the old cache.cfg referencing the missing 500GB Samsung SSD

• Renamed cache_.cfg to cache.cfg

• Server is still hanging after "Triggering udev events" after this fix

Still hung.

---

Conclusion of troubleshooting

• Not cache-related

• Not disk-related

• Not filesystem-related

Boot issue narrowed to:
non-storage hardware / driver initialization

---

Migration Status

Data migration: COMPLETE

• All cache data safely copied to 2TB SSD

Backup: COMPLETE

• system + domains backed up

SkyNetOps Recovery: INCOMPLETE

Attach Diagnostics ZIP to your NEXT post in this thread.

I can't boot to get a diagnostics.zip. Is there another way to get this?

Do you have a flash backup from before you started these changes?

Yes, via Unraid Connect.

That backup is your configuration, including the drive assignments when the backup was taken.

To see if the issue is related to the pools, you can just rename the /config/pools folder to /config/pools_bak and retest. If it boots, you can then reimport any pools.

Something the AI models tell me is that there's parameters that can be added to the boot that will display what device it's getting stuck on. Each model gives me a different parameter and none of them work. Is there any truth to this?

13 minutes ago, jacobMarley_ said:

Something the AI models tell me is that there's parameters that can be added to the boot that will display what device it's getting stuck on.

Not that I know of, but what I mentioned will confirm if the problem is a pool cfg file.

I got it working. It was the USB Flash drive.