Re: USB mount takes 30 seconds!

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Wed, 14 Nov 2007, Diego Zuccato wrote:

> Alan Stern ha scritto:
> > On Tue, 13 Nov 2007, Steve Kelem wrote:
> > 
> >> I have a USB hard drive that I'm trying to use with Linux.
> >> It does mount, but it takes 30 seconds!
> [...]
> > Possibly some error occurs, the system waits during a 30-second 
> > timeout, and then the disk is reset.
> > What shows up in the output from dmesg after you mount the filesystem?
> Happened to me, too, when using an 'old' kernel (2.6.19, maybe).
> It seems that "big" reiser filesystems might take quite a long time to
> be mounted, if umounted correctly (quite absurd, since a dirty
> disconnect takes less time to be recovered...).
> 
> Now I upgraded to a newer kernel (2.6.22-tmb-laptop-2mdv) and mount is
> nearly immediate on same HW.
> 
> Maybe some extra checks in reiser code that, while nearly undetectable
> on internal drives, slowed down external ones? But I think it's not
> USB-related.

This sounds reasonable.  There wasn't anything in the usbmon data to 
indicate a problem.

Try upgrading to a later kernel and see what happens.

Alan Stern


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