How to repair volumes on Synology NAS
Posted by MatjažS Admin, Nazadnje spremenjeno s strani MatjažS Admin on 11 April 2014 10:46 AM
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How to repair volumes on Synology NAS![]() OverviewWhen a volume suffers a hard disk failure or another issue, your DiskStation will warn you with a beeping sound. Volume errors might be caused by various issues, such as damaged system partitions or crashed hard disks. In this tutorial, we'll teach you how to diagnose various volume issues, repair system partitions, and replace failed hard disks. Note:
Contents
1. Turning off the beeping soundYour DiskStation will emit a beeping sound when a problem occurs. To deactivate it, go to Main Menu > Storage Manager > Volumeor Disk Group and click the Beep off button. ![]() 2. Diagnosing the problemFirst, you'll need to understand what's wrong with your volume. In the sections below, we'll explain how to check the status of volumes and hard disks. 2.1 Checking volume statusTo check the status of the volume, go to Storage Manager > Volume or Disk Group and check the Properties section. ![]() The table below provides a brief explanation of each status:
2.2 Checking hard disk statusThe status of individual hard disks can be found at Storage Manager > HDD Management. ![]() Hard disk numbering:
Hard disks installed in DiskStations with two or more bays are numbered from left to right and from top to bottom. To learn more about identifying hard disks installed in your DiskStation, please see here. Under normal circumstances, the status of hard disks should be Normal or Initialized. When a problem occurs, it might change toNot Initialized, System Partition Failed, or Crashed. The table below provides details regarding these status types.
3. Repairing volumesIn some situations, such as when system partitions are damaged or a volume is degraded, you can simply fix the problem yourself. In the sections below we'll look at fixing two issues: 3.1 Failed system partitionsThis problem occurs when the system partitions on a hard disk are damaged. The system partitions are where your DiskStation stores the necessary files for running the system. When partitions fail, the volume status will be Normal. Do not worry; your data is safe. To repair the hard disk, simply click the link marked Repair the system partition. ![]() 3.2. Degraded volumesA volume becomes Degraded when one or more hard disks have failed, but data loss has not occurred. This only happens with volumes that provide data redundancy, such as SHR, RAID 1, RAID 5, RAID 6, and RAID 10. Please refer to this table to see how many disk failures can occur with different RAID types. To repair a degraded volume, please follow the steps below:
Note: If a volume becomes Degraded due to the same hard disk many times, it means the disk may have defective sectors or other problems. You can follow the section below to perform a S.M.A.R.T. test to get more details about the disk.
4. Resolving crashed volume issuesWhen the status of a volume becomes Crashed, you cannot repair the volume by yourself. To solve this problem, we recommend contacting our Support Team for help. ![]() A volume enters Crashed-Read-Only mode when data inconsistency occurs on the hard disks. This might be due to unexpected power failure during a write process. In this case, data loss might occur. Please backup all the data you can and create a new volume. To backup data, you can consult this article.
Before contacting technical support, please do the followings:
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But when I try to connect to my DS212+, my Connection Status display: “Forbindelse mislykkedes” (Danish - in UK: “Connection Failed”, I think).
Now, I also have tried to insert ONE new 200GB Hard Disk and Install it from start. The DS212+ works fine with the new Hard Disk.
So now I’ll like to get my data from one of my two old Hard Disks. I have run RAID1 with two 2TB HD (identical types).
When I cannot connect / log in to my DS212+ with the two old HD in the DS212+, how do I read the data from one of the HD?
Will it work, if I put the 2TB HD into the DS212+ together with the new 200GB, after it have booted the DS212+ or do I risk losing my data on the 2TB HD?
Do you have any advice?
Best Regards,
Jim Pedersen
I would suggest you to power on your Synology with just one of two original hard disks.
After boot up use recovery procedure. It will reset your "admin" password and network setting on to default:
https://www.synology.com/en-us/knowledgebase/DSM/tutorial/General/How_to_reset_your_Synology_NAS
Download Synology assistant tool:
https://www.synology.com/en-us/support/download/DS212+
and find your Synology on your network.
Now you will be able to access your data on Synology.
If something goes wrong, choose recovery procedure with DSM reinstallation:
https://www.synology.com/en-us/knowledgebase/DSM/tutorial/General/How_to_reset_your_Synology_NAS#t3
Reinstall DSM.
Your data is safe and will be not touched.
After DSM re-installation you will be able to use your data again.
Best regards, Marko
Thanks for your reply, it is greatly appreciated (since I have got no meaningful response from the Synology support). I have come so far that I have reset and installed the latest version of DMS and gained access to my Hard Disk. (The password reset only did not work). It is now degraded and seems to have the data area untouched. I have ordered a new hard disk to complete the repair on. I will return with the results later, hopefully a good end of the story.... :-)
Thanks for your advice, Marko, and Happy Easter!
Regards Jim
Thank you for wishes and additional information.
I am surprised that Synology did not help you. I have very good experience with their support.
Anyway - you got your files back and you could make backup now what is preferable.
Your problem is not very common so starting from the scratch is best advice I could give you.
When you will have your system freshly installed just copy your data back.
Best regards, Marko
It is not possible to degrade RAID system to the basic JBOD system.
You could turn off beeping in Hardware & Power section of your Control panel and you could also turn off notifications in Notification -> Advanced section of your system.
https://www.synology.com/en-us/knowledgebase/DSM/help/DSM/StorageManager/volume_diskgroup_change_raid_type
Best regards, Marko