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10 Posts
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1066
November 18th, 2021 14:00
Error when attempting to restore from a CloudBoost device
We have recently begun backup to a CloudBoost device at AWS. I was attempting a test restore today and was met with the following error:
42795:nsrndmp_recover: Performing recover from Non-NDMP type of device
11/18/21 17:05:55.474714 NDMP Service Debug: The process id for NDMP service is 0x114b8288
42799:nsrndmp_recover: Failed to query the address type of the NDMP data connection.
42871:nsrndmp_recover: Error during File NDMP Extraction.
6161:nsrdsa_recover: unknown host name: my-server-01
42840:nsrndmp_recover: NDMP recover failed.
42880:nsrndmp_recover: Error during NDMP recover
16279:recover: NDMP retrieval: child failed with status of 1
67847:recover: Failed to recover files: NDMP retrieval: child failed with status of 1
The "unknown host" is the Unity NAS device that I am backing up to the CloudBoost device.
Restores from our Data Domain are successful.
Backups run without issue, so I'm not sure why this isn't working. Any thoughts?
BenRadHMX
10 Posts
0
November 18th, 2021 14:00
I added the ip and hostname of the host mentioned above to the hosts file on the CloudBoost device, but no luck.
bingo.1
2.4K Posts
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November 19th, 2021 04:00
I admit that I have absolute zero experience with the CloudBoost solution. And I did not find any document which describes the background processes. However, if I look at the messages, I am scared about all the 'mechanisms' which are involved here. Let me explain my concerns a bit further and hope that I do recall everything in an understandable way.
NDMP (Network Data Management Protocol) is basically nothing else but a block-based copy transfer which uses the SCSI Extended Copy command. So it is a very simple mechanism to copy data blocks between two SCSI devices (IDs/LUNs). Originally, it did not even provide the capability to extract metadata (index information) - this had been added later with the higher NDMP versions.
NDMP data transfers can only take place between specific NDMP services providing compatible NDMP devices. This means that for a simple tape backup you need a NDMP disk service (reading the blocks and/or the filesystem) and a NDMP tape service.
I am sure that there is no equivalent to a NDMP tape service running on a cloud based backup device. Such did not even exist for a disk device. So about 15 years ago Legato invented a solution which allowed the usage of disk device as pseudo NDMP tape device - a 'wrapper' called Data Service Agent (DSA).
Looking at the messages, one can get the impression that NDMP, together with DSA and along with Cloud Boost will be used here. This at least sounds very complicated. Maybe someone could please explain the Cloud Boost functionality a bit more precise.
But if it works differently, then I expect a misconfiguration as obviously NDMP & DSA messages should not appear here.
crazyrov
4 Operator
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1.3K Posts
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November 22nd, 2021 03:00
@BenRadHMX, What is storage node that you are using here ? Is it the CB itself or any other device.
BenRadHMX
10 Posts
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November 29th, 2021 06:00
I am using my main Networker storage node (the networker server on prem) to attempt to restore. Should I create a new CloudBoost device for restores?
tucny_kanec
1 Rookie
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2 Posts
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May 21st, 2024 14:01
https://www.dell.com/community/en/conversations/networker/ndmp-recovery/647f64eaf4ccf8a8de169e1d?commentId=664ca7c36f8223600252cf04ndmp_restore
storage node must be able to translate client into IP, so add that to /etc/hosts on your storage node.