IBM System Storage DS3500 Introduction And Implementation Manual page 275

Draft Document for Review March 28, 2011 12:24 pm
Table 9-2 Media scan errors
Reported error
Unrecovered media
error
Recovered media
error
Redundancy
mismatches
Unfixable error
A media scan is a long running process with the lowest priority, so you can only run a media
scan on logical drives that meet the following conditions:
Optimal status
No modification operation in progress
To locate this setting, highlight the logical drive in the Logical pane tree and right click to
select Change  Media Scan Settings. The window shown in Figure 9-30 opens.
Figure 9-30 Media Scan Settings for Logical Drive
Description
The data cannot be read on its
first attempt, or on any
subsequent retries.
The drive cannot read the
requested data on its first
attempt, but succeeded on a
subsequent attempt.
Redundancy errors are found.
The data cannot be read, and
parity or redundancy
information cannot be used to
regenerate it.
7914Admin_Logical.fm
Result
With redundancy check: Data is
reconstructed and scanned again.
Without redundancy check: No error
correction.
Data is written to drive and verified.
The first 10 redundancy mismatches found
on a logical drive are reported. Operating
system data checking operations should
be executed.
An error is reported.
Chapter 9. Administration - Logical Tab
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