ICRC's

[Jeremy Chadwick]

On Sun, Aug 10, 2008 at 06:01:34PM -0500, Larry Rosenman wrote:
> I'm getting the following on a zpool scrub:
>
> ad8: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=54817587
>
> I replaced the drive at ad8 because the original one would get an ICRC and then hang the bus.
>
> Model Family:     Seagate Barracuda 7200.10 family
> Device Model:     ST3500630AS
> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>   1 Raw_Read_Error_Rate     0x000f   105   100   006    Pre-fail  Always       -       9366477
>   7 Seek_Error_Rate         0x000f   063   060   030    Pre-fail  Always       -       2364626
>   9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       41
>  12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       7
> 190 Airflow_Temperature_Cel 0x0022   064   061   045    Old_age   Always       -       36 (Lifetime Min/Max 35/39)
> 194 Temperature_Celsius     0x0022   036   040   000    Old_age   Always       -       36 (0 32 0 0)
> 195 Hardware_ECC_Recovered  0x001a   068   064   000    Old_age   Always       -       207627383
> 199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       94
>
> Error 110 occurred at disk power-on lifetime: 41 hours (1 days + 17 hours)
>   When the command that caused the error occurred, the device was active or idle.
>
>   After command completion occurred, registers were:
>   ER ST SC SN CL CH DH
>   -- -- -- -- -- -- --
>   84 51 0f fe e7 36 49  Error: ICRC, ABRT 15 sectors at LBA = 0x0936e7fe = 154593278
>
>   Commands leading to the command that caused the error were:
>   CR FR SC SN CL CH DH DC   Powered_Up_Time  Command/Feature_Name
>   -- -- -- -- -- -- -- --  ----------------  --------------------
>   c8 00 00 0d e7 36 49 00      01:23:46.872  READ DMA
>   c8 00 00 0d e6 36 49 00      01:23:46.871  READ DMA
>   c8 00 00 0d e5 36 49 00      01:23:46.871  READ DMA
>   c8 00 00 0d e4 36 49 00      01:23:46.870  READ DMA
>   c8 00 00 0d e3 36 49 00      01:23:46.853  READ DMA
>
> Ideas?
>
> This is on a SuperMicro SYS-7045-TR+

You have one or more of the following:

1. Faulty ATA cable
2. Faulty ATA port
3. Faulty ATA controller (doubtful, unless the errors are specific 
   to one role (e.g. master or slave))
4. A 2nd disk which is equally as bad (came from the same manufacturing
   batch, which is very likely if the drive is of the same vendor and
   model type, and manufacturing date (within a month or two))

The disk's SMART error log even confirms the DMA errors, which proves
there is in fact a problem with one of the above.  In this particular
case, it's not FreeBSD.  :-)

My recommendation:

* Try another disk from a different manufacturer (not Seagate)
* If similar errors appear using that disk, the problem is either
  item 1, 2, or 3.
* If no errors appear, it's item 4, in which case send the disk
  to Seagate for RMA; their SeaTools utility, on a full scan, should
  definitely return an error code which you can give to Support when
  filing for the RMA.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |