*BSD News Article 91398


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From: dps96r@ecs.soton.ac.uk (Duncan Simpson)
Newsgroups: comp.unix.bsd.misc,comp.os.linux.misc
Subject: Re: Linux vs BSD
Date: 19 Mar 1997 15:17:08 GMT
Organization: Electronics and Computer Science, University of Southampton
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Message-ID: <5gp01k$qb9@wapping.ecs.soton.ac.uk>
References: <32DFFEAB.7704@usa.net> <prlfg5.bs.ln@zen> <Pine.NEB.3.95.970316102739.709D-100000@sphynx.fdn.fr> <5gjsc9$2cm@innocence.interface-business.de> <5gmk83$c9j@rzstud2.rz.uni-karlsruhe.de>
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Xref: euryale.cc.adfa.oz.au comp.unix.bsd.misc:2843 comp.os.linux.misc:165225

uk1o@rzstud2.rz.uni-karlsruhe.de (Felix Schroeter) writes:

>Hello!

>In article <5gjsc9$2cm@innocence.interface-business.de>,
>J Wunsch <joerg_wunsch@interface-business.de> wrote:
>>[...]

>>This might be because Linux doesn't have the concept of a `raw device'
>>at all.  I always wondered why they diminished this idea, and the
>>problem described looks like what you get from blasting an entire
>>disk's contents through the buffer cache.

>I think, that *is* a problem.

If you want to avoid this problem, open the device with O_WSYNC. This
flag will cause syncronous writes (and a *big* performance  hit).

Duncan (-: