Hi all

i have an CX480 with FC 15K disk for database  lun and 2 raid group with SATA2 disk for other data.

The two SP are often between 70 to 80 % use and some times the Cache Ps are full to 100 % and some database become so slow that  we have an

production disaster ..

For avoid this we buiy SSD disk and build a Fast Cache , 92 GO..

ichange  the metalun properties  for database for use the fast cache..

But for  SATA Lun , i have to choice..

-> remove all cache acces for preserve SP Cache  but the flow become really slow

-> use only Fast Cache for SATA Lun, without SP Cache ! it is possible with unisphere but, i don't know if it is a good idea

does anyone have an idea or an expérience return about  enable FastCache for a Lun witout SP cache ? ?

thanks to all and good week-end

                   Pascal