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List: zfs-discuss
Subject: Re: [zfs-discuss] zfs_nocacheflush
From: Roch - PAE <Roch.Bourbonnais () sun ! com>
Date: 2008-07-31 8:32:50
Message-ID: 18577.30898.143636.366914 () gargle ! gargle ! HOWL
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Peter Tribble writes:
> A question regarding zfs_nocacheflush:
>
> The Evil Tuning Guide says to only enable this if every device is
> protected by NVRAM.
>
> However, is it safe to enable zfs_nocacheflush when I also have
> local drives (the internal system drives) using ZFS, in particular if
> the write cache is disabled on those drives?
>
> What I have is a local zfs pool from the free space on the internal
> drives, so I'm only using a partition and the drive's write cache
> should be off, so my theory here is that zfs_nocacheflush shouldn't
> have any effect because there's no drive cache in use...
>
Seems plausible, But I'd check that the caches are indeed
off using format -e.
-r
> --
> -Peter Tribble
> http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss@opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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