Quite a while ago we did a change to enable quota’s larger than 4 TB – if you replicate from a system with a newer code than that to an older one you get inconsistencies.
Or replicate a deduplicated file system to a system with very old NAS code that doesn’t have deduplication implemented.
Similar with 7.1 – that contains changes for FLR enabled file systems to provide retention dates beyond 2038.
There I think we now block replication until you do a special conversion.
These are corner cases – typically we say that its ok for at least one product generation difference
Older to newer code is always easier than newer to older version
etaljic81
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January 24th, 2013 17:00
The NAS code does not have to be the same. I would recommend you pause replication and resume it after the upgrade.
Rainer_EMC
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January 25th, 2013 07:00
Generally it works between different DART code versions – but sometimes (not very often) there are on-disk layout changes that require an upgrade
etaljic81
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January 25th, 2013 08:00
Rainer,
Can you clarify what you mean by "there are on-disk layout changes that require an upgrade". Curious what that means.
Thanks.
Rainer_EMC
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January 25th, 2013 10:00
Quite a while ago we did a change to enable quota’s larger than 4 TB – if you replicate from a system with a newer code than that to an older one you get inconsistencies.
Or replicate a deduplicated file system to a system with very old NAS code that doesn’t have deduplication implemented.
Similar with 7.1 – that contains changes for FLR enabled file systems to provide retention dates beyond 2038.
There I think we now block replication until you do a special conversion.
These are corner cases – typically we say that its ok for at least one product generation difference
Older to newer code is always easier than newer to older version
etaljic81
1K Posts
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January 25th, 2013 13:00
Good to know. Thank you.