On Fri, 23 Mar 2007, Brett Glass wrote:

I have a server which I am considering upgrading from 4.11 to 6.2. Besides the operating system disk (which contains all of the expected partitions such as /, /usr, /var, and /tmp), There's a large data disk on the system containing useful data that I'd like to put back online as soon as the upgrade is completed. I'd rather not have to reformat it unless there is a significant advantage to doing so. Does 6.2 work properly with the older disk format? Is there any reason to take the time and effort to back up the data and restore it to the new format? Is there anything I'll need to be careful about if I upgrade just the system disk?

--Brett Glass

Brett,
    Yes, 6.2 does but there are features that were added to UFS2 (softupdates, 
file size limit raised past 2GB?) which make it a much better filesystem 
infrastructure than UFS1.
-Garrett

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