"On 2008-09-04 at 04:00 UTC, Subversion service write operations will be offline for no more than 24 hours. During this time, Subversion write operations (such as commit) will fail with an error. Read operations (checkout, ViewVC, etc.) will succeed as normal. This downtime is being used to migrate data on to new storage hardware and conduct performance testing. We are taking this downtime approach (leaving service online, with write operations failing) to minimize the functional impact to users."