[smartmontools-support] raw values ? help required?

[Franc Z. <fz...@in...>]

Some attributes are best viewed in hexadecimal format. To this end 
there is a "hex48" (48-bit hex) switch in smartctl, eg ...

$ smartctl -v 5,hex48 -v 196,hex48 -v 203,hex48 -v 
200,Write_Error_Rate - v 240,Transfer_Error_Rate -A /dev/ice

You can also change the names of the attributes, as in the previous example.

This article explains the attributes:
http://en.wikipedia.org/wiki/S.M.A.R.T.

I believe there may also be a switch to display smartctl results in 
"Fujitsu format".

Here are three attributes that look better in hex:

  Reallocated_Sector_Ct   = 9019431321600 = 0x083400000000
  Reallocated_Event_Count = 826015744     = 0x0000313c0000
  Run_Out_Cancel          = 3728044065286 = 0x036400be0206

AIUI, the Reallocated_Sector_Ct consists of three 16-bit words as follows:

(#spare sectors remaining) (#reallocated sectors) (#reallocation events)

So, AISI, the drive has 2100 (=0x0834) spares with no reallocations.

I believe the lower 16 bits of the Reallocated_Event_Count store the 
number of reallocation events.

I have no idea what the Run_Out_Cancel data mean, except to say that 
the raw value appears to consist of three 16-bit words.

As for the Raw_Read_Error_Rate, Seek_Error_Rate, and Write_Error_Rate 
(attribute 200), I understand the raw numbers to be a sector count, 
not an error count.

Fujitsu (and Seagate) drives compute the error rates for each block 
of sectors accessed. Seagate appears to count up to 250 million 
sectors before the number rolls over to zero, whereas Fujitsu appears 
to count up to a much smaller number, probably 0x3FFFF (= 262,143).

In short, I don't see anything that would worry me.

Regards,
Franc


At 05:21 AM 16/04/10, you wrote:
>Date: Thu, 15 Apr 2010 21:21:27 +0200
>From: "Linux User #330250" <lin...@gm...>
>Subject: [smartmontools-support] raw values ? help required?
>
>### DISK 1 - BEGIN
>
>Device Model:     FUJITSU MJA2500BH G2
>
>Vendor Specific SMART Attributes with Thresholds:
>ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH 
>TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>   1 
> Raw_Read_Error_Rate     0x000f   100   100   046    Pre-fail 
> Always       -       168559
>   2 
> Throughput_Performance  0x0005   100   100   030    Pre-fail 
> Offline      -       69861376
>   5 
> Reallocated_Sector_Ct   0x0033   100   100   024    Pre-fail 
> Always       -       9019431321600
>   7 
> Seek_Error_Rate         0x000f   100   100   047    Pre-fail 
> Always       -       1559
>195 
>Hardware_ECC_Recovered  0x001a   100   100   000    Old_age   Always 
>       -       18071
>196 Reallocated_Event_Count 
>0x0032   100   100   000    Old_age   Always       -       826015744
>200 
>Multi_Zone_Error_Rate   0x000f   100   100   060    Pre-fail  Always 
>       -       4007
>203 
>Run_Out_Cancel          0x0002   100   100   000    Old_age   Always 
>       -       3728044065286
>240 
>Head_Flying_Hours       0x003e   200   200   000    Old_age   Always 
>       -       0