Re: [Smartmontools-support]Raw_Read_Error_Rate goes up and down?

[Bruce A. <ba...@gr...>]

Hi,

> first I must say that I tought the Prefailure Attributes can only become
> worse and not better?

Is there something in the documentation that says this? If so, please tell
me so I can correct it.

> Jul 14 15:26:31 [smartd] Device: /dev/hdb, SMART Prefailure Attribute: 1
> Raw_Read_Error_Rate changed from 73 to 72_
> Jul 14 15:56:52 [smartd] Device: /dev/hdb, SMART Prefailure Attribute: 1
> Raw_Read_Error_Rate changed from 72 to 73_
> Jul 14 16:27:13 [smartd] Device: /dev/hdb, SMART Prefailure Attribute: 1
> Raw_Read_Error_Rate changed from 73 to 74_
> 
> The values are changing mostly between 72-74, somethimes up to 76.
> 
> Is this behavior normal on this kind of disk? It's a Seagate
> ST340810A (I append the smartctl output). Or it is a sign
> that the disk is about to die (not tomorrow, but slowly)?

The Attribute values can either increase or decrease.  So what you are
seeing is expected.

The WORST value (which you can see as part of the output of smartctl -A)
should only decrease.  But it's not monitored by smartd.

By the way, are these trailing underscores "_" part of the output as shown
above?  They shouldn't be there...

Cheers,
	Bruce