Deduped running constantly on TS-251+ running QTS 5.2.11

English Backup and data protection
1

I’ve logged a ticked for this problem.

But in case this rings a bell on your side.

The NAS is a TS-251+ running QTS 5.2.11.3661

There are 2 x 12To discs setup with RAID1

HDP for PC/VM version is 2.4.0

I’m have migrated 2 Windows 11 PCs over 3 from netbackup to HDP for PC

I have first setup 2 shared folders on a single datavolume datavol1

1 PC (PC1) has around 2.5 To of data and the other (PC2) around 300Go.

But as I wanted to have 2 different snapshot configuration to allow more snapshot on PC2.

I unconfigured PC2 via HDP and then suppress the share folder and recreate the same on another datavolume Datavol3 which is crypted.

From there on I see

There is a negative deduplication rate!!! (-81%)

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And more importantly depuded is constantly running between 5% and 20% and the discs are constantly spinning (and much more than before)

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Also I didn’t create any new backup in the last 4 or 5 days !!

I’m not sure the administrative actions above created the problem but at least this is the context.

How can I clear that situation ?

As the NAS is used only for backup, there is no problem to suppress all backup data and to re-run the backups.

Thanks for your help

2

Hi @moebius38,

Thank you for the detailed description and screenshots, and for logging a support ticket. This information is very helpful.

We are checking on your support ticket, and our team will also try to reproduce this behavior based on the steps you described (re-creating the PC2 backup shared folder on an encrypted data volume with HDP for PC/VM 2.4.0). We will keep following up and update you here.

Thanks again for your patience.

3

Hi @Lucas,

About the potential scenarios that lead to this. One part is the creation of a new crypted data volume as you mentioned earlier.

About the first step wich is the deletion of the previous backups and share folder I see two scenarios:

I have QTS/HDP with French language. I’m translating French “Référentiel” to english “referencial”. I hope it’s the name you choose to represent in Enslish QTS/HDP the HDP notion of association between a share folder and “referencial” for a given physical platform / VM.

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Scenario 1

In HDP / Référential : Suppression of the referencial.

There was a question asking if I wanted to also suppress data: I answer yes.

Then in the Control Panel / Share Folders : suppression of the share folder

There was question asking if I wanted to also suppress data: I answer yes.

Then creation of a new HDP referential on a crypted data volume.

Scenario 2

In the Control Panel / Share Folders : suppression of the share folders

There was question asking if I wanted to also supress data: I answer yes.

Oooops! I think the sequence I’m following here is not in the right/logical order.

In HDP / Référential : Suppression of the referencial.

There is a note saying that the share folder is no longer existing

I suppress the referencial.

If there was a was question asking if I wanted to also supress data: I answer yes. I don’t recall if the question was asked.

Then creation of a new HDP referential on a crypted data volume.

Another point on how the clear the point deduped running all the time:

Could you advise me on what sequence of actions to perform to bring back deduplication in a normal state where it’s not looping endlessly?

It can be instructions on the QTS portal as well as unix commands directly on the unix OS of the TS 251+ NAS.

Thanks for your time and efforts.