On Sun, 15 Aug 2004, Mikael Björn wrote:

> I'm getting serious trouble from this driver since I tried to add a
> LaCie d2 BigDisk 500 through the USB to the system (a 2.6.3 kernel).
> Fdisk reports bogus drive geometry and only recognizes 1Gb out of the
> 500Gb, which of course is really bad. 

2.6.3 is pretty old.  You should use something newer, like 2.6.8.

> I can use this drive under Mac OSX and Windows 2k/XP/2k3 without any
> problems. Linux allow me to create a partition on the "drive" after
> I've been forced to change the geometry by hand. mkfs manages to
> create a filesystem on this partition but fails to write the
> superblock and therefore I'm unable to write anything to te drive...
> Bad, right? 
> 
> I've looked through the kernel archives and there are some mentions
> about this because there is something about the kernel just trying to
> read BIOS for drive geometry and for a USB device that is a bit
> cumbersome... right? 

Wrong.  The kernel only uses BIOS for disk geometry information about IDE 
drives, not USB drives.

> There seems to be some problems either with the BIOS part or there is
> something in the handover between USB and SCSI layers. However I was
> able to read this beast under 2.4.21 although formatted under XP and
> with NTFS... No good! 

There is no BIOS part involved and no handover between USB and SCSI.

> So here I am treading water with a useless 500Gb just waiting to be
> used with Linux... 
> 
> Any ideas on how to get this on track again??? 
> 
> Thanks for any help!

First try upgrading.  If that doesn't help, you can get more information
about what's happening by turning on the usb-storage verbose debugging
option in your kernel configuration and rebuilding the driver.  Post the
dmesg contents showing the kernel log from when usb-storage is loaded and
your device is detected, plus when you try to mount it.

Alan Stern



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