Why are spaces removed from the disk serial number?

[Cetnerowski, Adam]

Hi Phillip,

Dmraid does in fact match the disks' serial numbers read from the device
and the metadata to create raid sets. So, if the numbers don't match (as
is it appears to be in this case), the raid set won't be recognized by
dmraid.

The serial number for sdb does look fishy and it could be interacting
strangely with the library isspace() function used to strip out the
whitespace (if some of the strange characters are control characters).
This may be the reason why the raid set is recognized under Windows.

Adam Cetnerowski
Intel Technology Poland

-----Original Message-----
From: ataraid-list-bounces at redhat.com
[mailto:ataraid-list-bounces at redhat.com] On Behalf Of Phillip Susi
Sent: Monday, June 23, 2008 11:17 PM
To: ATARAID (eg, Promise Fasttrak,Highpoint 370) related discussions
Subject: Why are spaces removed from the disk serial number?

I am investigating a bug report from a user where dmraid fails to 
recognize their array because one of the disks serial numbers does not 
appear to match the serial number recorded in the disk table slot for 
their isw raid ( which works fine in windows ).  It looks like dmraid 
reads the serial number from the disk with an inquiry command, then 
removes whitespace characters from it.  Why is this and could this be 
the cause of the problem?  Also, it appears that the disk serial number 
contains non ascii characters.  Is this normally allowed and how should 
they be interpreted?  UTF-8?

The full bug report can be found here:

https://bugs.launchpad.net/ubuntu/+source/dmraid/+bug/138130

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