![]() ![]() Read speeds, write speeds, processor speeds, and RAID processor speeds (if you have a dedicated RAID card) all factor in how long a rebuild will take.Įven the RAID type will affect how long the rebuild takes. This is why I originally thought Virtualization Station was giving me issues. Rebuild times vary on all RAID devices, especially if the device is still in use. If Storage Manager still doesn’t show it, it will eventually appear as a percentage progress indicator later. You can still check /proc/mdstat to get some information.Īdditionally, you can check Storage Manager > Volume > Volume Name. What If You Don’t Have a Rebuild Status or Percentage?Īfter starting the repair process, the status just shows Repairing (checking parity consistency) without a percentage of completion.ĭon’t worry, your NAS is still doing its thing. You will need to get to 100% on every MD0 through MD6. This just means it is still in the queue. If you see that at the bottom of the MD entries, you know that they haven’t completed the parity check yet. The difference between drives that have been completed versions ones that haven’t come down to resync=DELAYED. Some disks will be mirrors and another will be striping information. Additionally, not all disks will take the same amount of time. Sometimes the check will go for another round. You have finally seen the status of your rebuild get to 100% (especially in the GUI) and then it started over! AHH!ĭon’t worry. Parity Consistency Check Reached 100% and Then Restarted. The following answers basic questions about the rebuilding process. Common Questions When Rebuilding Your Synology Drives This process can happen without interruptions to other NAS tasks. It is possible to see multiple MD designations rebuilding simultaneously. If necessary, you can use CTRL + C to quit the current process.Įach volume is listed with mdstat, or Multiple Devices, meaning the volume can be made up of many drives.Type or paste one of these commands: cat /proc/mdstat or watch cat /proc/mdstat.The command you will run does not require logging in as root, but you do need a user that has SSH access, which is usually the admin anyway.Connect and log in with your username and password with admin privileges.Put the IP address of your NAS in the destination input.Make sure the SSH radio button is selected.For Mac, pick one of these SSH clients.How to Establishing a SSH Session With Your NAS The bad news is the number is hidden and you can only reveal it by establishing an SSH session. The good news the system does calculate the time remaining. This, however, does not give you any semblance of time remaining. In the Storage Manager, you will see a percentage completion in the Status field. The rebuild will take a long time, so how would you check the status? You have already started the rebuild but you want to know how long this type of operation will last. After deleting the VM, I removed Virtualization Station and bought and set up a UPS. I would have done so if this problem happened again. I thought I would have to RMA the hard drive. I’ve had this disappearing hard drive problem happen twice. I have had 3 power outages within a few months that could have caused data integrity issues due to improper shutdown. Perhaps I was peaking resources often enough to interfere with legitimate NAS operations. I had this enabled while constantly running a Windows Server 2019 VM for mild CPU tasks. Virtualization Station may have caused this.So what could have caused this? I have two theories for events that happened. A Parity Consistency Check for the drives of my size will take hours. I have max recommended RAM and 2 NVMe SSD cache drives.Īfter the drive was found and scans have been completed, it was time to repair the array. I have 5 equally sized NAS hard drives configured in Btrfs at maximum redundancy. More Context to the Disappearing Hard Drive Another Important Storage Task – Data Scrubbing.Can I Restart DSM While Rebuilding a Drive?.Can I Replace Other Drives While RAID Array Is Rebuilding?. ![]() What If You Don’t Have a Rebuild Status or Percentage?.Parity Consistency Check Reached 100% and Then Restarted.Common Questions When Rebuilding Your Synology Drives.How to Establishing a SSH Session With Your NAS.More Context to the Disappearing Hard Drive. ![]()
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