Dangerous to repair storage pool if you have a drive with a few bad sectors?

[mhilliar]

Im replacing a bad drive (2) and when I went to hit repair on the pool it says I have bad sectors on (3). how dangerous is it to just do the repair and then after buy a new drive for (3)? I don't think I really have much choice as I don't have a backup but any ideas is appreciated.

 

[strikes2k]

If your RAID set is functional I would do a backup as my first course of action.

 

[Telos]

few bad sectors

Define "few".

Still you have little choice... and the drive has spare sectors for this type of occurrence. As said above, be sure your backups are current then initiate the repair.

 

[mhilliar]

I think it was like10 bad sectors. I know the number wasn't high. I had one drive go bad and pulled it out to replace it. I don't have storage space for a back up. I have 4 10tb hard drives in the nas and dont have a way to back the entire thing up. I was going to do the repair and then replace the number 3 drive that has the bad sectors. how dangerous do you think that would be?

 

[Telos]

I have 4 10tb hard drives in the nas and dont have a way to back the entire thing up. I was going to do the repair and then replace the number 3 drive that has the bad sectors. how dangerous do you think that would be?

Without a backup every rebuild opens the door to the possibility of total loss should another drive fail during the rebuild process (as do DSM upgrades, unexpected power loss... ). While it's not normally dangerous, when things go sideways the results can be catastrophic. It's your call, but it's not like you have options.

 

[akahan]

Even if you don't have room to back the whole thing up, before doing the repair, it would probably be a good idea to copy just your most irreplaceable or important files to another drive, perhaps one connected via USB, or elsewhere on your network. Just because you can't protect EVERYTHING doesn't mean you shouldn't protect SOMETHING.

 

[Sbrady373]

Im replacing a bad drive (2) and when I went to hit repair on the pool it says I have bad sectors on (3). how dangerous is it to just do the repair and then after buy a new drive for (3)? I don't think I really have much choice as I don't have a backup but any ideas is appreciated.

There are tools in the synology app store that you can setup to backup to an AWS S3. Back it up to there, then run repair. All goes well just delete the AWS data at that point. Even for 4tb, the storage cost is nominal. Listen to everyone here. Its worth a some extra time and a little money to avoid potential catastrophy. Thats what I did for mine when I had to replace a drive. Everything went smoothly so no concerns but the piece of mind was huge.