Hey guys,

 

I had some trouble with transfers to the cache drive.

All of them failed after a few minutes in the transfer. I now changed the cache drive with a new WD Red. (Still testing transfers now...)

 

This is the latest smart report i got (see attachment)

 

Are any of the values abnormal?

This is the 4'th of 5 Seagate drives that has failed now in a timespan of almost 3 years!

smart.txt

Drive looks fine, no abnormal values.

 

Does the syslog show errors to the drive?  Many times, it's not the drives' fault but the cable or something else.

I'll check this weekend. The drive is in a hot swap bay. I'll switch its place with the new one i replaced it with and run some tests. If it's cabling or backplane, the new drive should return the same issues and the old one should be fine then.

I swapped the new WD RED cache drive in old one's bay.

I tested read speed with:

 

for ((i=0;i<8;i++)) do hdparm -tT /dev/sdk; done

 

The new drive gets read speeds of 145MB/s average.

The old one (which is a 7200rpm drive!) gets around 77MB/s in that same bay.

When swapping it around a bit i can get it to 95MB/s .

 

This is too low right? Shouldn't i be seeing +120MB/s on that drive?

I swapped the new WD RED cache drive in old one's bay.

I tested read speed with:

 

for ((i=0;i<8;i++)) do hdparm -tT /dev/sdk; done

 

The new drive gets read speeds of 145MB/s average.

The old one (which is a 7200rpm drive!) gets around 77MB/s in that same bay.

When swapping it around a bit i can get it to 95MB/s .

 

This is too low right? Shouldn't i be seeing +120MB/s on that drive?

 

I just had a WD Green Drive that passed ALL S.M.A.R.T tests. It even passed its preclear with flying colours. All baring speed.

 

It would only read at <= 20MB/s.

 

Another WD Green same slot would read FULL speed.

 

I put it down to one of those things. A defective drive. R.M.A.