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Restore from backup
Hi, I have automated backup running on my ReadyNAS 2100 (Radiator 4.2.31), which creates a single backup file (Using RSYNC to another ReadyNAS). How do I restore from this file to retreive a specif...
Bazstad01 wrote:
Looks like I'm screwed then, but many thanks for the help and the links provided.
Well, you could try using the iSCSI initiator to connect to the destination LUN of the rsync backup job. You have nothing to lose, and it's possible you'll be able to get the file(s) you are looking for.
For future reference, the best approaches are to use ReadyDR (on OS 6 NAS), or to run backup software on the server that is using the LUN to back up the files that are in it.
Forgot to mention, the backup source is an ISCSI LUN, does this make a difference to the file created?
Yes, it does make a difference: Strongly doubt the replicated container file can be re-purposed as an iSCSI LUN.
Look here: https://kb.netgear.com/24659/Why-Replicating-iSCSI-LUN-s-is-not-possible-on-ReadyNAS-OS-6 (sigh, you can ignore the ReadyData hint - these systems are no longer available).
Looks like I'm screwed then, but many thanks for the help and the links provided.
Bazstad01 wrote:
Looks like I'm screwed then, but many thanks for the help and the links provided.
Well, you could try using the iSCSI initiator to connect to the destination LUN of the rsync backup job. You have nothing to lose, and it's possible you'll be able to get the file(s) you are looking for.
For future reference, the best approaches are to use ReadyDR (on OS 6 NAS), or to run backup software on the server that is using the LUN to back up the files that are in it.
I'm not sure how I would connect to it as I can't create a new LUN from the backup file, but thanks for the suggestion. I am currently setting up a file based backup job via the server holding the iSCSI connection.
schumaku wrote:Yes, it does make a difference: Strongly doubt the replicated container file can be re-purposed as an iSCSI LUN.
Look here: https://kb.netgear.com/24659/Why-Replicating-iSCSI-LUN-s-is-not-possible-on-ReadyNAS-OS-6 (sigh, you can ignore the ReadyData hint - these systems are no longer available).
Wow, that article is so out of date, it's amazing. It talks of the long-gone ReadyNAS Replicate and long-abandoned ReadyData. The basic concept remains, though.
Any file-level copy (like a backup job) can't properly duplicate an iSCSI LUN because the physical (block level) organization must be duplicated, not just file-level. While the ReadyData used ZFS send/receive, the ReadyDR capability of ReadyNAS OS6 can also do block-level replication (it appears to be the Netgear implementation of BTRFS send/receive), so will work with an iSCSI LUN. In order to make the backup available for restoration, it is necessary to clone one of the ReadyDR destination snapshots (typically, the latest, unless you know a copy was made after a change from which you need to recover). Just how one goes about doing that for an iSCSI LUN, I have no experience.
I have only used ReadyDR in an attempt to move a share and it's snapshots to another volume. Seems you can copy them, but you cannot make it a usable share on the destination and retain the snapshots connected with it.
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