FreeNAS

I want to build funcation like this ,

I was a superuser , I can updata or change ISCSI target disk , so I install some software and office data for another normal user .

And normal user can user ISCSI target like local disk , they operate any way , but not real write in , when they reconncet ISCSI target , they
will found that ISCSI disk recovery(or roll back) my setting
well if you not understood my sentence ~~ ( my bad English)

I can say it simple what funcation I will build .

ISCI-cake do you hear that ?

I will build funcation of ISCI-cake under linux OS

Cuz , I do not like windows and windows software is too expensive .