October 13Oct 13 So here is the story. Started with a single enclosure with three 3tb drives and a 2tb drive. No parity. Drives 1-4A friend gave me three 4tb drives and I had a spare 1tb drive. I've installed them in a second enclosure. Drives 5-8Unraid can see them all. The 1tb drive is pooched (as I expected) and doesn't even format.My plan is to use the second enclosure drives for backing up the first enclosure and other devices on my network. I'm not concerned with parity. I can seemingly browse the disks. I've tried configuring Duplicati but as soon as I apply the change to send backups to a drive on the second enclosure, I get drive errors.Is running two enclosures not possible, or am I missing a setting?How do I remove the failed drive from the system? Each time I pull it, I get config errors.
October 14Oct 14 Author Yes, both enclosures are 4 space USB attached set to RAID0memory-alpha-diagnostics-20261014-0956.zipDiagnostics attached. Much obliged.
October 14Oct 14 The diagnostics show the problem: when you tried to format disk8, the second enclosure reset and then disconnected completely. All 4 disks in it (disk5 to disk8) dropped offline at the same time, and the format failed with I/O errors. So the problem is the enclosure and its USB connection, and the 1TB disk may not be bad at all. The Duplicati errors when writing to that enclosure are very likely the same thing.Running two enclosures is possible. The problem is that USB is not recommended for array or pool devices. These multi-bay USB enclosures put all their disks behind one USB-to-SATA bridge. With sustained writes they can reset or disconnect, and when that happens every disk in the enclosure drops out together. They also don't pass SMART correctly. In your diagnostics, SMART reports are returned for the wrong disks (for example, the report for disk8 is actually from one of the 4TB disks), so you can't trust the disk health shown in the GUI. The disk IDs are also based on the enclosure bay, not the actual disk, so moving a disk to a different bay will change its ID. For reliable operation, connect the disks to SATA ports or use an HBA.To remove disk8 from the array: since you have no parity, go to Tools -> New Config, keep current assignments for all slots, then unassign disk8 on the Main page and start the array. The other disks keep their data. Just make sure you don't format any disk.If you want to check whether the 1TB disk is really bad, test it on a SATA port or in a single-disk adapter, not in the enclosure.
October 14Oct 14 Author Good to know. Its strange that the two enclosures are the same brand and model but seem to behave slightly differently in regards to drop off. To confirm though, and this has been my aprehension, running the New Config tool will NOT delete any data, unless I select 'format'. Correct?I'm hoping to get a stable environment ahead of creating a pool for backups across my devices.Cheers.
October 14Oct 14 26 minutes ago, jnye6601 said:To confirm though, and this has been my aprehension, running the New Config tool will NOT delete any data, unless I select 'format'. Correct?Correct for data drives, just don't assign a previous data device to parity.
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