Upgrade from old OMV (2.2.14) to recent OMV (5 or 6 after release)
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- OMV 2.x
- tom_tav
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Im not sure where to put the OMV base system
I use a 32GTB usb flash drive (3 in total) I rotate them on a monthly basis, so I always have a usable backup, I don't have a cache drive for ZFS, no more connections left
Docker and containers are on a laptop drive, which I don't back up as the containers are deployed using stacks, which I keep copies of.
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How many of your usb flash drives used for OMV did go bad during the last years
None
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How many of your usb flash drives used for OMV did go bad during the last years?
Wear of flash memory is minimized using the flashmemory plugin, downside is the lack of up-to-date log files in case of an OS crash
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Wear of flash memory is minimized using the flashmemory plugin
Correct
downside is the lack of up-to-date log files in case of an OS crash
And where did you get that useless piece of information, there is no lack of log files on a usb flash drive, if there is a system crash then you'll need the most recent sys log
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How many of your usb flash drives used for OMV did go bad during the last years?
The same here, none. I have 3 USB 16GB drives for my main server. They are a primary, a backup and a 3rd in the reserve that only gets updated if I change the functionality of the NAS. I've been using one drive, primarily, for over 4 years. It's still good.
You will, however, need to install the flashmemory plugin to support using a thumbdrive to boot. You'll need -> OMV-Extras. Once that's installed, you'll be able to find and install -> the flashmemory plugin.
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After creating your ZFS pool, consider running the following on the CLI, before copying data into the pool's filesystems. This sets up Linux equivalent permissions to include ACL's if you decide to go that route. (Compression is a free bonus.)
(Sub in the name of your pool for ZFS1)
zfs set aclinherit=passthrough ZFS1zfs set acltype=posixacl ZFS1
zfs set xattr=sa ZFS1
zfs set compression=lz4 ZFS1
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Could it be the changed ACLs?
How did the permissions or ACL's get changed in the destination? If they did, yes, the changed files would be deleted (they don't exist in the source) and be recopied. As a rule thumb (that I use) when an Rsync copy is complete, I immediately run it again to verify that all went well with the first copy. In a large copy, recopying a few files or minor issues is not uncommon if, for example, the server becomes really busy with something else. When a job is run and no files are copied, you'll have a functional mirror.
So you have all 3 USB connected permanently and do a alternating backup from the boot one to the two backup USB drives?
No. My cloned thumbdrives are cold. One is sitting on top of the case and the other is in a drawer. They're copied with an off-line -> process.
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And where did you get that useless piece of information,
https://openmediavault.readthe…the-purpose-of-the-plugin
data in a RAM buffer & intended to be written to drive at a later time, can't exist at the same time on the drive => logs are small pieces of data , hence at time of a crash the logs can't be written out to the drive => incomplete logs
This understanding of "implications of buffering" is a basic fundamental in IT development -
logs are for troubleshooting! Do hobbyists have remote logging servers?
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logs are for troubleshooting! Do hobbyists have remote logging servers?
The point your are trying to make is moot as the plugin should also be used on SSD's, and TBH this continues to emphasise the importance of having a backup of your OS drive.
Again to emphasise the point you are making, do hobbyists actually have backups!!
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plugin should also be used on SSD's
Disagree with this statement, because SSD controllers have advanced algorithms for wear leveling and memory over provisioning to compensated for failed flash memory cells. These technics are NOT used for memory cards, hence they fail much faster than SSDs with the same capacity.
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