On 12/2/24 00:02, Jeffrey Walton wrote:
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
I was providing anecdotal information for the OP and other readers to
consider, because sometimes we lose sight of the forest for the trees.
David
