Degraded Pool

TrueNAS General
1

Sept. 12 - I’m running TrueNAS Scale ElectricEel 24.10.1 on an HP Z420. Unfortunately, my pool is degraded. I have (had) 4 disks in a RAIDZ1 and just received the following message:

Pool Jarvis_4x12TB state is DEGRADED: One or more devices has been removed by the administrator. Sufficient replicas exist for the pool to continue functioning in a degraded state.
The following devices are not healthy:

  • Disk 15010095029358028260 is REMOVED

I am very new to TrueNAS and computers in general so I will try my best to follow but it will take me a while. I have tried to online the disk to no avail, it still says removed under Storage Topology. It gave me no SMART errors before this happened. I tried using a different SATA cable, power cable, and SATA port on the mobo and still have nothing.

Any direction is very helpful and appreciated.

2

Hi and welcome to the forums.

Do you have a spare drive to start a replacement?

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3

Thanks!

Haha sadly not at the moment, I do have some drives on the way to start that process. Is it best to shut down the machine until a replacement drive arrives?

4

I pulled the drive out and put it into a different PC to check the smart data. I currently have 8 pending sectors and more importantly, the helium level is at 1. I assume this means the drive is toast.

5

Do you have a backup of your pool data? I would backup your important data asap, in case of another drive failure. Your pool and data is at risk until you get the replacement drive in and complete the resilver.

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6

Yes that makes sense, thanks for the reminder. My backup is almost complete and then I might shut it down until I get the new drive.

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