Data Storage - Re: Mirrored volume - data immediately available on the mirrored volume without umount

Author

Re: Mirrored volume - data immediately available on the mirrored volume without umount

dgholt@gmail.com

2005-10-06, 2:46 am

Your question basically is, will an operating system handle properly if
you go and change the data on a mounted file system without it knowing
about it. And the answer is, it depends. If you disable all caching it
will probably work. However without unmounting and remounting, it may
have some data cached and wont bother to look to the disk to see if has
changed. So it will work, but the OS may now know about it.

Does that make sense. Technically what your customer is saying can be
done, very easily, but in real life you wouldn't do it in fear of
data corruption on the secondary site or the OS not knowing about it.