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Re: RAID60 question

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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.
> 
> Thanks in advance for any help
> Greg


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.


David

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RAID60 question Greg <pld@sojka.co> - 2024-12-01 13:40 +0100
  Re: RAID60 question David Christensen <dpchrist@holgerdanske.com> - 2024-12-01 19:30 +0100
    Re: RAID60 question Greg <pld@sojka.co> - 2024-12-01 20:00 +0100
    Re: RAID60 question Jeffrey Walton <noloader@gmail.com> - 2024-12-02 09:10 +0100
      Re: RAID60 question David Christensen <dpchrist@holgerdanske.com> - 2024-12-03 01:40 +0100
  Re: RAID60 question Michael Paoli <michael.paoli@berkeley.edu> - 2024-12-02 04:50 +0100

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