Patent ID: 7277254

Claim:
A magnetic recording disk apparatus which is for use in load unload (LUL) operation and comprises a magnetic recording disk and a magnetic head, wherein said magnetic recording disk comprises a substrate, a magnetic layer formed on the substrate, a protective layer formed on the magnetic layer and a lubricant layer formed on the protective layer, the lubricant layer containing a perfluoropolyether compound having an end moiety containing a phosphazene ring and a perfluoropolyether compound having an end moiety containing a hydroxyl group in a weight ratio of 2:8 to 8:2, said perfluoropolyether compound having an end moiety containing a hydroxyl group has a weight average molecular weight of 2,000 to 8,000, a polydispersity [Mw/Mn] of 1.25 or less and is a compound having a structure of the formula (II), wherein each of m and n is an integer of 1 or greater.