Block based backup from client

Hi community

I want to know the correct syntax to start a BBB backup with PSS 

I tried the following sintax command 

 

save -D3 -LL -c CLIENT -s BACKUPSERVER -z "MOUNTPOINT" -b POOL -o "\"PSS:streams_per_ss=2 -l full 1> D:/logs_NAME_20190117_5.txt 2>&1

 

but the PSS doesn't works .

 

Can you help me

I wait your answer

Grazie

Daniele