ADA0 unreadable sector

[Savell Martin]

Hey guys,

I keep getting this message over and over again.
I kicked off a scrub, but just wondering what the best course of action is here?

Should I just go ahead and replace the disk?

Apr 8 18:04:54 freenas smartd[2444]: Device: /dev/ada0, 1 Currently unreadable (pending) sectors
Apr 8 18:04:54 freenas kernel: <118>Apr 8 18:04:54 freenas smartd[2444]: Device: /dev/ada0, 1 Currently unreadable (pending) sectors

 

[Bidule0hm]

Well, there is only one unreadable sector but usually when you have one you'll have 10 tomorrow and 100 the day after tomorrow...

What I recommend is to buy a spare drive now and if the unreadable sector rises then replace the drive (see the replace process in the manual) ;)

NB: make sure you have scheduled automatic SMART tests.

 

[Savell Martin]

How do I schedule SMART in 9.3?
I have SMART enabled but doesnt seem like there is an option for schedule.

 

[Bidule0hm]

It's in the Tasks tab then SMART Tests ;)

 

[SweetAndLow]

How do I schedule SMART in 9.3?
I have SMART enabled but doesnt seem like there is an option for schedule.

Read the manual

http://doc.freenas.org/9.3/freenas_tasks.html#s-m-a-r-t-tests

http://doc.freenas.org/9.3/freenas_services.html#s-m-a-r-t

 

[Savell Martin]

Thanks for the reply's.

I have enabled SMART so will see how that goes.
Its still reporting 1 sector so at least its not going up like crazy.

Lastly if I were to say buy a bigger capacity drive maybe 4/5tb over the 3tb that I have in there, I wouldn't be able to use the extra space until I replace all the drives is this correct?
And is there a way to drop the faulty drive out the pool, and just run it as degraded?

 

[gpsguy]

Yes.

Lastly if I were to say buy a bigger capacity drive maybe 4/5tb over the 3tb that I have in there, I wouldn't be able to use the extra space until I replace all the drives is this correct?

What happens when the next drive fails? Instant data loss.

And is there a way to drop the faulty drive out the pool, and just run it as degraded?

 

[Savell Martin]

Yeah i get the instant data loss.
I wont be doing it for a long period. Maybe an hour or so.

And then I will be swapping it out.