Storage server queries

Hi,

I have some general queries related to exadata storage server (cells).

1. Do we need to have separate OS ids for all the storage servers???

 

2. Is there is any way to manage all the cells (storage servers) from same prompt ???

 

3. Do we need to invoke cellcli from db server itself and give the name of cell to which we want to connect or need to login to storage server seperately and invoke cellcli ?

4. cellcli can be invoked only from root user or oracle user also ?

 

5. While configuring the cell for first time, we need to create celldisk, griddisk, flashdisk and flachcache. We need to do this for all the cells. Do we need to do for each cell by logging separately or by a single CLI prmopt????