" ... I recently purchased a new toy, an Intel X25-M SSD, and when I was setting it up initially, I decided I wanted to make sure the file system was aligned on an erase block boundary. This is a generally considered to be a Very Good Thing to do for most SSD’s available today, ..." Quick-and-dirty guide to stripe size alignment. Useful for (striped, non-1) RAID setups as well.

Short overview of two new filesystems for Linux. NiLFS is essentially identical to NetBSD's logfs--and since it's available for NetBSD as well, I wonder if there's a connection.

ExoFS is a complex associative object-based filesystem that 'emulates' a standard Unix file hierarchy.

" ... This the Chiron Filesystem. It is a Fuse based filesystem. It's main purpose is to guarantee filesystem availability using replication. But it isn't a RAID implementation. RAID replicates DEVICES not FILESYSTEMS. .. " -- seems to offer fs-level replication, but again, the details on recovery after volumes have gone out of sync are scarce. It looks like the right idea with the wrong execution.

" ... Gluster simplifies the task of storing massive amounts of unstructured data. GlusterFS is an open source clustered file system that runs on commodity hardware, delivering greater scalability and performance at a fraction of the cost of conventional storage. ... " -- other than that, they do seem to offer fs-level data replication, although it's entirely unclear how it's implemented.