【多选题】
A mounting disk groups
B managing Allocation Units (AUS)for disk group content
C managing extent allocation for Oracle database segments
D acting as an I/O server to read data file blocks from ASM disks on behalf of database server processes
E acting as an I/O server to write data file blocks to ASM disks on behalf of Database Writer processes(DBWR)
F managing space allocation for Oracle ASM files
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