*BSD News Article 62972


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Newsgroups: comp.unix.bsd.freebsd.misc,comp.os.linux.development.system
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From: rob@pe1chl.ampr.org (Rob Janssen)
Subject: Re: The better (more suitable)Unix?? FreeBSD or Linux
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References: <4gejrb$ogj@floyd.sw.oz.au> <4gilab$97u@park.uvsc.edu> <4giqu8$aqk@park.uvsc.edu> <4gira2$a9d@park.uvsc.edu> <hpa.31321eee.I.use.Linux@freya.yggdrasil.com> <4h7t5i$qoh@park.uvsc.edu> <DnoqB4.2sy@pe1chl.ampr.org> <4hirl9$nr7@gizmo.nas.nasa.gov>
Date: Wed, 6 Mar 1996 08:47:36 GMT
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Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:15002 comp.os.linux.development.system:18812

In <4hirl9$nr7@gizmo.nas.nasa.gov> truesdel@gizmo.nas.nasa.gov (Dave Truesdell) writes:

>The point you seem to want to ignore is, while data integrity is not
>guaranteed, it only affects those files being written at the time of a
>crash.  If you don't guarantee metadata integrity, you could loose *every*
>file on an active filesystem.

Please show us how that can happen, and how sync metadata is going to
avoid it.  I think you are only spreading FUD.
(or is there some inherent fragility in FFS that is not in the classic
UNIX filesystems and ext2fs?)

>If you ever had to manage systems where a restore takes 8 hours to run, even
>when mounted async, you might care more about having a filesystem that
>maintained metadata integrity.

I have used and maintained UNIX systems for well over 12 years, I have
had to come back in over the weekend to move 80MB filesystems or to wait hours
just to load the base system, I have seen many interesting things happen
after system crashes, but I *never* have seen a system or even heard of
a system that lost all its files after a simple crash.
(i.e. not one that started out by writing data to the raw disk device,
something that sync metadata is not going to cure either)

Rob
-- 
+------------------------------------+--------------------------------------+
| Rob Janssen         rob@knoware.nl | BBS: +31-302870036 (2300-0730 local) |
| AMPRnet:       rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
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