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Forum Discussion
dhl
Dec 05, 2013Luminary
Inexpensive NAS for over 4TB backups - recommendations?
To date, we've backed up our ReadyNAS Pros using cheap USB drives. This has served us well over the past three years but as we move forward to much larger disks and volume capacity, I'm rethinking thi...
StephenB
Jan 10, 2014Guru - Experienced User
In addition to deleted files, there are modified/changed files to consider.
The built-in backup is best for recovering your NAS from failure. There is some protection from user error, but it is much more limited than what you'd find in a continuous backup program that does versioning.
No matter how you do the settings, your ability to get back an older version depends on you noticing that you need to do that fairly quickly, and then manually searching for the version you want in the backup (which of course might not be there).
The snapshot feature in OS6 actually helps quite a lot - you have a much larger window of time to recover the older files, and there might even be multiple versions in the various snapshots. The approach I've taken on the RN102 is to set "remove deleted files on target" - making my recovery of deleted files identical with my recovery of changed files (both being dependent on snapshots). Then if I do need to recover the data due to failure, I won't restore deleted files. BTW, I periodically delete old snapshots manually, as the automatic policies sometimes result in growing the snapshots larger than I want them to be.
Though on the older NAS (without the good snapshots) I leave "remove deleted files on target" to "off". Periodically I do a backup with the setting "on" to clean out old deleted files. That has actually worked out ok - (a) my primary NAS hasn't needed to be restored in quite a while - the last time was when I was still using the duo v1 as primary (which also taught me why I needed a UPS btw). (b) recovery from user error has also been pretty rare, and when it does happen the family tends to tell me right away.
Secondary backups (done weekly or quarterly) are a good way to give you more time to recover accidentally changed or deleted files.
The built-in backup is best for recovering your NAS from failure. There is some protection from user error, but it is much more limited than what you'd find in a continuous backup program that does versioning.
No matter how you do the settings, your ability to get back an older version depends on you noticing that you need to do that fairly quickly, and then manually searching for the version you want in the backup (which of course might not be there).
The snapshot feature in OS6 actually helps quite a lot - you have a much larger window of time to recover the older files, and there might even be multiple versions in the various snapshots. The approach I've taken on the RN102 is to set "remove deleted files on target" - making my recovery of deleted files identical with my recovery of changed files (both being dependent on snapshots). Then if I do need to recover the data due to failure, I won't restore deleted files. BTW, I periodically delete old snapshots manually, as the automatic policies sometimes result in growing the snapshots larger than I want them to be.
Though on the older NAS (without the good snapshots) I leave "remove deleted files on target" to "off". Periodically I do a backup with the setting "on" to clean out old deleted files. That has actually worked out ok - (a) my primary NAS hasn't needed to be restored in quite a while - the last time was when I was still using the duo v1 as primary (which also taught me why I needed a UPS btw). (b) recovery from user error has also been pretty rare, and when it does happen the family tends to tell me right away.
Secondary backups (done weekly or quarterly) are a good way to give you more time to recover accidentally changed or deleted files.
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