ASM Default Disk String location .... 

Operating System           Default Search String

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Solaris (32/64 bit)       /dev/rdsk/*
Windows NT/XP             \\.\orcldisk*
Linux (32/64 bit)         /dev/raw/*
HP-UX                     /dev/rdsk/*
HP-UX(Tru 64)             /dev/rdisk/*
AIX                       /dev/rhdisk/*