Re: New concept of ext3 disk checks

[Lee Revell]

On Thu, 2004-08-12 at 14:58, Bernd Eckenfels wrote:

> I am not sure why the softupdates are so reliable, that no fsck is needed

Softupdates were introduced to enhance performance by batching and
deferring disk operations.  I belive that initially, performance was the
only consideration in determining what actually got written to disk
when.  All the BSD/OS manuals I read at my last job warn against
enabling softupdates because data loss could occur.

Someone later realized that if you batch the disk operations in a way
that considers the atomicity of the filesystem operations being
implemented, softupdates can help *ensure* data integrity.  This is a
pretty recent development I think.

Lee

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