Subject: Re: accessing IDE hard drive via pcmcia card (redirected from netbsd-users)
To: Manuel Bouyer <email@example.com>
From: Steven M. Bellovin <firstname.lastname@example.org>
Date: 05/21/2004 15:29:21
In message <20040521192041.GA807@antioche.eu.org>, Manuel Bouyer writes:
>On Sat, May 22, 2004 at 04:58:30AM +1000, Daniel Carosone wrote:
>> Another workaround, and interesting test, would be to turn off
>> write-cache on the drive:
>> dkctl wdX setcache r
>> and then try the unmount. I'm hoping/assuming this would wait for the
>> superblock write to complete. Could you try this? If it does, then
>> building the moral equivalent of
>> dkctl wdX synccache force
>> into the close is the right way to fix this. It even seems to me like
>> if we don't do this, there might be other similar lossage cases
>> lurking than the pcmcia one you found.
>There is already wd_flushcache() on last close in wd.c. This should be enouth.
I assume that I still need to do the 'setcache r', correct?
--Steve Bellovin, http://www.research.att.com/~smb