Public bug reported:
This is an error I already encountered when testing prior versions of
Ubuntu on different hardware (different PC and different HDDs). I used
to think that this was due to the hardware and thus I did not report
this.
When connecting two brand new USB HDDs to the same PC and copying files
eg from the built-in HDD to external USB HDD 1 while at the same time
mounting USB HDD 2, the copying process to HDD 1 stops and I get an "I/O
error" message. Similar things have happened with different copying
operations (eg from external USB HDD 1 to external USB HDD 2). Seems
that Ubuntu has severe problems with dealing with more than one external
HDD, which makes it extremely difficult to tidy up your external HDDs.
In this case external USB HDD 1 was NTFS formatted and external USB HDD
2 was FAT32 formatted. The built-in HDD was ext3, which is Ubuntu's
default. This time testing on a MacBook Pro rev. 3 with Ubuntu 8.10
64-Bit.
My first thought was that maybe two USB powered HDDs consume too much
power when in used at the same time, and that the notebook cannot cope
with this. However, when I tested this half a year ago, the HDDs I used
had their own power supply and yet the same error occured.
** Affects: ubuntu
Importance: Undecided
Status: New
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Intrepid: Ubuntu has severe problems when using two USB HDDs at the same time
https://bugs.launchpad.net/bugs/321862
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