On Sun, Dec 1, 2024 at 3:47 PM David Christensen <dpchr...@holgerdanske.com> wrote: > > On 12/1/24 04:27, Greg wrote: > > Hi there, > > > > I'm setting up MD-RAID0 on a top of HW-RAID6 devices (long story). I > > would like to confirm the following: > > > > 1. The RAID0 chunk size should be the stripe width of the > > underlying RAID6 volumes. > > > > 2. The RAID0 metadata should be at the end of the device (metadata ver. > > 1.0). > > > > 3. The stride and stripe-width of the ext4 fs should be set to the once > > used when creating RAID6 volumes. > > I have a SOHO network and I implemented file sharing many years ago. > Around 2019, I switched from md to ZFS. The learning curve has been > non-trivial, but I am pleased with the results and expect ZFS will be a > better solution going forward. > > > Regarding data migration in general, my previous approach had been > in-place using one server and minimal disks (e.g. "cheap"). An operator > error on a prior migration resulted in loss of some archival backups. > So, I threw money at the problem this time around -- buy another server, > buy more disks, build the new server, migrate the data, make the new > server primary, rebuild the old server, and make the old server > secondary. And, backups before, during, and after. So, more time and > money, less risk, no data loss, and rebalanced data/ maximum performance > afterwards.
??? What questions did you answer? Jeff
