[Beowulf] Re: mysterious slow disk

[David Mathog]

Bruno Coutinho wrote:

>  What is the Reallocated_Sector_Ct in smartctl? If it's non zero, you will
> have badblocks soon.
> 
> How is the Seek_Error_Rate is compared with orher HDs?

Here is part of smartctl -a for the slow one, with some columns
edited out so that it will fit without wrapping.  The disk is old but
it isn't throwing any conventional sorts of errors:

ID# ATTRIBUTE_NAME          FLAG       UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000b     Always       -       0
  3 Spin_Up_Time            0x0007     Always       -       2658
  4 Start_Stop_Count        0x0032     Always       -       88
  5 Reallocated_Sector_Ct   0x0033     Always       -       0
  7 Seek_Error_Rate         0x000b     Always       -       0
  9 Power_On_Hours          0x0032     Always       -       44036
 10 Spin_Retry_Count        0x0013     Always       -       0
 11 Calibration_Retry_Count 0x0013     Always       -       0
 12 Power_Cycle_Count       0x0032     Always       -       88
196 Reallocated_Event_Count 0x0032     Always       -       0
197 Current_Pending_Sector  0x0012     Always       -       0
198 Offline_Uncorrectable   0x0012     Always       -       0
199 UDMA_CRC_Error_Count    0x000a     Always       -       0
200 Multi_Zone_Error_Rate   0x0009     Offline      -       0

Regards,

David Mathog
mathog at caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech