Hi,

recently I ran one pass on each of my 3 disks. I've not ran pre-clear before so I am unsure what

and how many errors are safe! I wonder is somebody could please have a look.

/dev/sda

 

/dev/sdb

 

/dev/sdc (first pre-clear)

 

/dev/sdc (second pre-clear)

 

Many thanks

D

 

The only parameters we are interested in are those marked as "FAILING_NOW" or a change in the number of re-allocated sectors, or sectors pending re-allocation.  This has been discussed many times in this thread.

 

The "second" pre-clear of /dev/sc showed an increase of re-allocated sectors from 14 to 15.  This is not a huge problem as there are typically several thousand spare sectors, but.... and bad sectors should have been found by the first pre-clear you performed on that drive.  I would perform one more pre-clear cycle.  If the number of re-allocated sectors continue to increment slowly upward, consider using that disk in a MS-Windows PC where its loss of data can be blamed on Microsoft. (It really wont be their fault)

The only parameters we are interested in are those marked as "FAILING_NOW" or a change in the number of re-allocated sectors, or sectors pending re-allocation.   This has been discussed many times in this thread.

 

The "second" pre-clear of /dev/sc showed an increase of re-allocated sectors from 14 to 15.  This is not a huge problem as there are typically several thousand spare sectors, but.... and bad sectors should have been found by the first pre-clear you performed on that drive.   I would perform one more pre-clear cycle.  If the number of re-allocated sectors continue to increment slowly upward, consider using that disk in a MS-Windows PC where its loss of data can be blamed on Microsoft. (It really wont be their fault)

 

Haha, thanks Joe. I'm running another pre-clear as you suggest. I shall report back.

Ok, the 3rd pre-clear finished on disk sdc.

It did not show any reallocated sectors this time.

 

What it did show was:

 

Change in raw_read_error_rate

change in seek_error_rate

change in hardware_ecc_recovered

change in udma_crc_error_count

and ATA error count from 2 to 3

 

A good disk or time for the bin?

Thanks

d

 

Of course Joe L. knows more about this than anyone else, but I would think the disk would be OK to use. I would keep check on it from time to time to see if the reallocated sector numbers grow or not. If they don't then the drive is just fine.

 

Phil

Ok, the 3rd pre-clear finished on disk sdc.

It did not show any reallocated sectors this time.

 

What it did show was:

 

Change in raw_read_error_rate

change in seek_error_rate

change in hardware_ecc_recovered

change in udma_crc_error_count

and ATA error count from 2 to 3

 

A good disk or time for the bin?

Thanks

d

 

Since you did not post the results, we cannot do anything but offer general advice.

 

Are any of the parameters stating FAILING_NOW

 

Are you looking at the "raw" values?  If so, forget it.  The only ones humanly readable are re-allocated sectors, sectors pending re-allocation, and (sometimes) temperature.

 

It sounds like the drive is fine.  The output of the preclear script is the DIFFERENCE between the smart report at the beginning of the process and the one at the finish.  Your re-allocated sectors did not change, so not line was output.  They did not go away either...

 

As already stated, keep an eye on that drive's smart report over the next few years.  If the re-allocated sector count climbs rapidly, RMA the drive.  Since most drives have several thousand spare sectors, you have a LONG way to go before the manufacturer will consider the drive as FAILED for that reason.