When Should I replace my hard drive?

[NoobCase]

Hi Guys,

 

I'm running my home NAS, a Synology DS415+, with 4 x 2TB WD REDs running RAID 5 (with data protection) - yer... its a synology thing.

One has been reporting bad sectors for a while now and I was wondering if there is any rule of thumb as to how many bad sectors is acceptable. The drive is seeming working just fine. The error occurs when doing data scrubbing on the volume and the drive will report back with I/O error and bad sectors found. When doing both extended and quick S.M.A.R.T tests the disk will report back succesfully.

 

Everything is back up using symform so I'm not that afraid of data loss, but better safe than sorry, so would it be adviceable to change the disk now or is it perfectly safe to wait on more bad sectors? 

 

@Captain_WD

[79wjd]

How many bad sectors and how long has it taken to get to the level where they're at? I wouldn't worry tooo much about it until the number of sectors increases dramatically or increases regularly (i.e. a few is no problem, a few hundred is).

[NoobCase]

16 minutes ago, djdwosk97 said:

How many bad sectors and how long has it taken to get to the level where they're at? I wouldn't worry tooo much about it until the number of sectors increases dramatically or increases regularly (i.e. a few is no problem, a few hundred is).

Think its 2 or 4. Has not changed ever since they first appeared...  Unless new ones appear  during the current scrubbing. 

[79wjd]

3 minutes ago, NoobCase said:

Think its 2 or 4. Has not changed ever since they first appeared...  Unless new ones appear  during the current scrubbing. 

Then I wouldn't worry about it, just keep a close eye on it and when it starts to increase daily and/or you see big jumps then that's when I would worry. 

[NoobCase]

Just now, djdwosk97 said:

Then I wouldn't worry about it, just keep a close eye on it and when it starts to increase daily and/or you see big jumps then that's when I would worry. 

Thanks for confirming  my initial gut feel

[Captain_WD]

18 hours ago, NoobCase said:

~snip~

Hey there

 

I'd second @djdwosk97's suggestions. If the drive passes WD Data Lifeguard Diagnostic tool's tests it should be safe to use. 

You can get the raw values of the S.M.A.R.T. status and see if there's something wrong with the drive and if yes - how bad is it. Feel free to post them here if you have trouble reading them. 

 

Filling the drive with zeros will reset any stuck sectors and will wipe any logical problems on the drive. Then you can rebuild your array.

 

Captain_WD.

[NoobCase]

1 hour ago, Captain_WD said:

Hey there

 

I'd second @djdwosk97's suggestions. If the drive passes WD Data Lifeguard Diagnostic tool's tests it should be safe to use. 

You can get the raw values of the S.M.A.R.T. status and see if there's something wrong with the drive and if yes - how bad is it. Feel free to post them here if you have trouble reading them. 

 

Filling the drive with zeros will reset any stuck sectors and will wipe any logical problems on the drive. Then you can rebuild your array.

 

Captain_WD.

Thanks I will try that... But nut until I have the symform back up and running again. Upgraded the NAS to DSM 6 but apparently that makes the symform app incompatible. Appreciate the reply!

[Captain_WD]

1 hour ago, NoobCase said:

~snip~

I would contact the manufacturer or check some ways of bringing the NAS back to the older firmware, if that's causing the issue. The guys at their support should have more info on that.

 

Post back with the results once you are done testing

 

Captain_WD.