Slow restore from deduplicated 11.7 vault (All-Flash)

Hi everyone reading this,
using the latest build 44421 of Acronis Backup 11.7 I still worry about the restore speed - I have been dealing with this since 3 years.
Restore from a deduplicated vault in general is slow (around 35MB/s), while the hardware utilization of the storage node is low.
I created an all-flash test enviroment, which still gave me no faster restores, but even lower storagenode utilization.
Specs:
StorageNode:
- 1x Xeon E3-1270V2 (4x3,5Ghz, 8M Cache)
- 4x 8GB DDR3, 1333Mhz
- 1x Intel 520 120GB (Systen + StorageNode Appfiles)
- 1x Samsung 850 Pro 250GB (Catalog, DeDup and Datastore)
- 1x Intel i350 Gigabit Ethernet
Target machine:
- 1x i3-4370
- 2x 4GB DDR3, 1666Mhz
- 1x Intel 535 250GB
- 1x Intel i217 Gigabit Ethernet
Data was restored from a deduplicated vault on the all-flash machine.
Few data from the vault below:
Archive: 16
Backups: 21
DeDup (Locality): 53MB
Catalog (sum): 3,1GB
Unified_data: 182GB
"computers" folder: 11GB
Restore of a full backup from GFS scheme, standard parameters was about 25MB/s.
Load on the storage node during restore:
CPU: 4%
RAM: 21GB static
System disk: 0%
Data/Catalog/DeDup disk: 5%
Ethernet: 25%
During catalogization: Only 1 core is used, slow progress.
If only one part of the machine was at 100% I could improve that, but not with everything staying almost idle.
Any suggestion would be great.

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Hello,
What build was used to create the Managed Vaults with deduplicaiton?
Thank you.
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Hello Igor,
build versions below:
Storage node has 11.7.44421
Clients have 11.7.44421
Regards
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Hello,
Sorry for the late reply.
You mention that this issue has been ongoing for 3 years.
Did you recreate the vaults after the update from scratch and these are new backups? Did you use a detach/attach operation? Or did you simply update the storage node?
If you did not create a new vault, would it be possible to create one in order to run a quick test on a new vault (created using the new version)?
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Hello Igor,
thanks for your reply. Meanwhile I created support case 02717738, which Ivan Lapushenkov is working on.
Your request:
Yes, the issue (slow restore with no hardware bottleneck visible) is with me since 3 years, through various builds.
Method used:
- Upgrade test StorageNode to 44421
- Delete any vaults
- Create the all-flash vault, Backwards-compatibility: off
- Backup 18 clients (all build 44421) to it
- Restore a system
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