VxFS clear blocks mount option

While reading through the VxFS administrators guide last week, I came across a cool mount option that can be used to zero out file system blocks prior to use:

“In environments where performance is more important than absolute data integrity, the preceding situation is not of great concern. However, for environments where data integrity is critical, the VxFS file system provides a mount -o blkclear option that guarantees that uninitialized data does not appear in a file.”

This is pretty cool, and a useful feature for environments that are super concerned about data integrity

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