check disk integrity

[Bob]

** Reply to message from Gene Henley <mhenley2 at verizon.net> on Tue, 21 Apr 2015
17:45:00 -0400

>    I wonder also. Would     Sudo fsck ................   work?

It appears fsck will not work in this case.

Anyone have any other ideas.  It looks to me like the only option is to
reformat the partition.


bob1 at Jupiter:~$ sudo fsck -t fat32 /dev/sdb5
fsck from util-linux 2.25.1
fsck.fat 3.0.26 (2014-03-07)
0x41: Dirty bit is set. Fs was not properly unmounted and some data may be
corrupt.
1) Remove dirty bit
2) No action
? 1
Cluster 28158 out of range (38621698 > 1274853). Setting to EOF.
Cluster 28159 out of range (71716176 > 1274853). Setting to EOF.
Cluster 28160 out of range (85322017 > 1274853). Setting to EOF.
Cluster 28161 out of range (257879298 > 1274853). Setting to EOF.
Cluster 28162 out of range (39019890 > 1274853). Setting to EOF.
Cluster 28167 out of range (192112964 > 1274853). Setting to EOF.
Cluster 28168 out of range (2957362 > 1274853). Setting to EOF.
Cluster 28169 out of range (53819680 > 1274853). Setting to EOF.
Cluster 28170 out of range (3683384 > 1274853). Setting to EOF.
Cluster 28171 out of range (4352333 > 1274853). Setting to EOF.
Cluster 28173 out of range (139288124 > 1274853). Setting to EOF.
Cluster 28175 out of range (20417595 > 1274853). Setting to EOF.
Cluster 28177 out of range (4915200 > 1274853). Setting to EOF.
Cluster 28178 out of range (55853382 > 1274853). Setting to EOF.
Cluster 28183 out of range (3223888 > 1274853). Setting to EOF.
Cluster 28184 out of range (153100333 > 1274853). Setting to EOF.
Cluster 28185 out of range (238630457 > 1274853). Setting to EOF.
Cluster 28186 out of range (156049461 > 1274853). Setting to EOF.
Reclaimed 25 unused clusters (204800 bytes).
Free cluster summary wrong (1274821 vs. really 1274846)
1) Correct
2) Don't correct
? 1
Leaving filesystem unchanged.
/dev/sdb5: 6 files, 6/1274852 clusters
bob1 at Jupiter:~$ 


> 
> On 04/21/2015 05:13 PM, Bob wrote:
> > What command do I use to check disk integrity?
> >
> > Currently I have a FAT32 partition on an external disk that has a problem and
> > need to fix it.  I would like to also know how to do this on the Linux file
> > systems.

-- 
Robert Blair