Transfer data intermittent (by equal blocks of data)

[fabitaly67]

Hello,
I just installed PrimoCache for the first time in a virtual machine (Win11) configured with a storage of 8TB (HDD) crated by Storage Spaces in Mirroring.
This Machine act as a new NAS and I'm transferring from an old NAS 1,8 TB of data (various kind of files).
While the trasferring I observe that the data Flow is not constant but is intermittent (by blocks of +/- the same amount of datas). This duty cycle has been +/- costant during the entire tranfert NAS to NAS. This duty cycle has been confirmed also observing the HDD LED ON/OFF on the appliance.
See this picture:

Also see the picture of configuration.
Cache L1 is 16GB of RAM, Cache L2 is a virtual SATA SSD disk of 64GB create in VM in a 6,4TB Nvme PCIe INTEL 4608 card. Virtual Platform is Proxmox.

Anybody could explain me if it is correct? Or something is wrong in the configuration?

Also data write speed during writing of blocks is very poor, about 220MB/s max.

Thanks,

Regards
FAB

[bill67]

Hi
try to allocate more L2cache if possible..

[Support]

Do you use the "Average" write-mode? Can you upload a screenshot of the PrimoCache main dialog as described in the link below?
https://kb.romexsoftware.com/en-us/2-pr ... leshooting

[fabitaly67]

Hello, here the PrintScreen of the main dialog.
Please, in case of error or something incorrect on configuration, I will appreciate your suggestions.
Thanks
FAB

[fabitaly67]

Hi
try to allocate more L2cache if possible..

As You can se the L2 Cache is at the MAX

Regards

FAB

[Support]

Because defer-write is enabled, write-data will be first stored in the cache (here the L1 cache, according to your configuration) and then flushed to the target drive (D:) at a certain interval (here 10s), that's why you saw intermittent writes on the D: drive.

PS. Your L2 cache is too small (only 64GB) compared to the ~6TB target drive. Generally, it is recommended that the L2 size be 20% or more of the target drive size unless not much data will be read from the target drive.