Re: [Bugme-new] [Bug 13335] New: USB portable hdd taking 10 - more than 30 minutes to detect

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On Sat, 6 Jun 2009, Jithin Emmanuel wrote:

> Some stats on this issue. I have a 320 GB portable hdd. So after
> partitioning I am left with 298 GB. When I have about 150 GB free
> space there is no problem. This starts appearing when the free space
> further drops and approaches around 100 GB.
> This hdd behaves same in other computers also.

So it appears that you were right, there is a bug in the disk drive.  I 
have no idea how we could work around it.

There is a way you can force the drive to connect using UHCI instead of 
EHCI.  Then at least you wouldn't have to suffer through 10 to 30 
minutes of failed connection attempts.  But you wouldn't be able to 
transfer data at high speed.

The command to use is something like this:

	echo 5 >/sys/bus/usb/devices/usb2/../usb_host/companion

You might have to add an extra directory level between the "usb_host" 
and the "companion" parts of the path; I'm not sure.  The "5" is the 
port number from the error messages and the "2" is the hub number.

Alan Stern

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