Re: Sysinstall automatic filesystem size generation.

From: Mark Kirkwood (markir_at_paradise.net.nz)
Date: 08/30/05

  • Next message: Jon Dama: "Re: Sysinstall automatic filesystem size generation." 
    Date: Tue, 30 Aug 2005 14:18:40 +1200
To: Matthias Buelow <mkb@incubus.de>

    Matthias Buelow wrote:

    >
    >>From what I understand from googling around on that issue, the
    > write-barrier stuff should make that much more unlikely. Of course
    > there could be the situation that it was a kernel that did not
    > (properly) support write-barriers yet, or the Linux implementation
    > has/had bugs (not too unlikely), or the disk was so broken that
    > even the flushing workaround strategies were ignored or it otherwise
    > didn't properly flush it, etc. But they're at least trying to cope
    > with the issue. BTW., when have you last seen a broken NTFS?

    LOL, well quite often - nt4 seemed to specialize in this, win2k and
    winxp (particularly 2k) however, seem much better...

    > While
    > I don't do Windows much, I have had quite a few crashes on Windows
    > (2000, XP) over the years on various machines, and I always asked
    > myself how it could be that the system is up almost immediately
    > (probably due to log replay) with no discernible filesystem damage.
    > Windows (NT) has been doing the write barrier flush tricks (disabling-/
    > reenabling the cache for flushing it) for longer than Linux and I
    > would think that this contributes to the fault resilience of NTFS.
    > Not that I would imply that NTFS can't be corrupted, of course.
    >

    But otherwise, thanks for a very informative post.

    Hmm, I think OSX does something like this too.

    Funnily enough, I have never lost files while using FreeBSD, even tho
    I'm using ATA disks with the write cache enabled - and I have had power
    loss situations. The robustness was one of the things that persuaded me
    to switch from (Redhat 7.3/8.0 I think) to FreeBSD (4.6 I think).

    However that is ancient history, If everyone is working out how to
    manipulate the write cache on-demand, then I guess FreeBSD needs to as
    well...(not volunteering... probably a bit out of my league).

    Cheers

    Mark
    _______________________________________________
    freebsd-stable@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-stable
    To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"

  • Next message: Jon Dama: "Re: Sysinstall automatic filesystem size generation."