[CentOS] Ext4 on CentOS 5.5 x64

[cpolish at surewest.net]

Les Mikesell wrote:

> Are there guidelines about what are reasonable results or will the 
> 'Smart Health Status' tell you enough after the tests run?

In a recent study[1] of a large population of hard drives 
these assertions stood out:

  [A]fter their first scan error, drives are 39 times more 
  likely to fail within 60 days than drives with no such errors. 

  Drives with one or more reallocations do fail more of-
  ten than those with none. The average impact on AFR
  appears to be between a factor of 3-6x.

  After their first reallocation, drives are over 14 times
  more likely to fail within 60 days than drives without
  reallocation counts, making the critical threshold for this
  parameter also one.

  After the first offine reallocation, drives have over
  21 times higher chances of failure within 60 days than
  drives without offine reallocations...

  The critical threshold for probational counts is also one: 
  after the first event, drives are 16 times more likely to 
  fail within 60 days than drives with zero probational counts.

[1] Failure Trends in a Large Disk Drive Population
    Eduardo Pinheiro, Wolf-Dietrich Weber and Luiz A. Barroso
    Google Inc.
-- 
Charles Polisher