I am about to purchase an HP DL380 server for a customer. This server is ….coming along with 2x300GB SAS SFF 15K/12G drivers, on a Smart Array P440ar/2GB FBWC storage controller. I was planning of purchasing another 3X300GB 10K/6G drivers so I make two arrays, one with raid 1, using the 2 x 10k drives and one with raid5 using the 3 x 10k drives. I was planning to setup a Hypervisor server on the raid1, to host an application server (putting the application server drive on the raid1) and to create a second host as a file server putting the hdd drive of that server on the raid5 array. Is all that a good idea? Am I going to use all disk in their higher possible performance ? or the system will run as fast as the 10k disks, making the 15k disks work slower than they could. Shall I purchase a 1X300GB 15k disk, instead of 3X300Gb 10k disks (because that’s the cost relation..) and just create one raid 5 array to host everything? … ( and loose the storage space..).
Thank you in advance