Re: [gentoo-user] Re: External HDD: sector size incorrectly detected on first connect

[Marc Joliet <marcec@gmx.de>]

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Am Sun, 22 Mar 2015 14:28:09 +0100
schrieb Marc Joliet <marcec@gmx.de>:

> Am Wed, 11 Mar 2015 08:04:05 +0100
> schrieb Marc Joliet <marcec@gmx.de>:
> 
> [...]
> > OK, I'll follow up there, then.
> 
> I finally did that, now that I tested with vanilla-sources-3.19.2.  See for
> example http://thread.gmane.org/gmane.linux.usb.general/124047.
> 
> I also opened a bug at https://bugs.gentoo.org/show_bug.cgi?id=543684.

After diagnosing the problem with the help of Alan Stern and Matthew Dharm, the
conclusion was that the sector size translation must be triggered by some
interaction between the drive and the BIOS.  The test I performed to determine
this was:

- unplug the drive,
- turn on the computer,
- plug the drive in once GRUB has started, and
- boot the kernel,

after which the drive worked fine.  So this does not seem to be anything that
can be fixed in the kernel.  Perhaps if I had an EFI compatible mainboard, I
wouldn't be seeing this problem, but I don't, so I can't even try it out :-/ .

-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup

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