Re: [POT] Which journalised filesystem ?

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Thu Oct 04 2001 - 16:25:12 EST


> > Alan mentioned this was something to do with the IBM hard disk
> > having strange write-cache properties that confuse ext3.
>
> Which IBM harddrive(s) does this? How can one check if it does?

Its not specifically IBM, there are two sets of things to watch out for

- Cache flush as a nop/unimplemented. This is legal in all but the
        most recent ATA specification. The spec has been tightened so that
        problem will go in time

- Some IBM laptop drives appeared to fail to write back the cache on
        machine shutdown/suspend etc. The exact rights/wrongs/details on
        that one haven't been pinned down because the folks concerned
        swapped a couple of drives for different ones, saw the problem
        vanish and being a large organisation had the supplier replace the
        other fifty odd.

Alan
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