mkdir在asm中做了什么？

ASMCMD> mkdir expdptest
    <- prepare('/* ASMCMD */ select group_number, state from v$asm_diskgroup_stat where name='DATA'')= ( DBI::st=HASH(0x33f3528) ) [1 items] at asmcmdshare.pm line 3003
    <- execute= ( '0E0' ) [1 items] at asmcmdshare.pm line 3022
    <- fetchrow_hashref= ( HASH(0x33e2f00)2keys ) [1 items] row1 at asmcmdshare.pm line 3055
    <- finish= ( 1 ) [1 items] at asmcmdshare.pm line 3076
    <- DESTROY(DBI::st=HASH(0x33e84b8))= ( undef ) [1 items] at asmcmdshare.pm line 1633
    <- do('/* ASMCMD */alter diskgroup /*ASMCMD*/ "data" add directory '+data/expdptest'')= ( '0E0' ) [1 items] at asmcmdshare.pm line 3112
ASMCMD>