HP has recently launched their 8th generation of their ML series servers which are quite attractive to the eye when it comes to price. However, the cost of their hard disks ( specifically SATA ) are nearly triple that of a similar brand ( ie Western Digital, Seagate, etc )
The HP Long Form Factor 3TB SATA 7200rpm server disks cost over €1,00.00 per drive and HP only offer a warranty of 1 year on each drive.
An over the counter Seagate 3TB 7200rpm SATA drive is available for under €200.00, complete with a THREE YEAR warranty.