I'm used to seeing raw disks/devices inside ASM diskgroups, but at my new contracting gig, they have a Netapp storage appliance, and are using nfs mounted luns. What they've done in the ASM Diskgroups is have actual .asm files that show up in a filesystem mounted on the OS. (see below for a "picture" of what I'm talking about). This is my question: How would these .asm files be getting created? (I'll need to know this when I need to add space to an existing disk group) ASM_DISKGROUP= DATA_GROUP The "disks" inside this disk group are: /prod_dbName_data/asmData/nfs_data_dbName_01.asm /prod_dbName_data/asmData/nfs_data_dbName_02.asm /prod_dbName_data/asmData/nfs_data_dbName_03.asm /prod_dbName_data/asmData/nfs_data_dbName_04.asm /prod_dbName_data/asmData/nfs_data_dbName_05.asm /prod_dbName_data/asmData/nfs_data_dbName_06.asm /prod_dbName_data/asmData/nfs_data_dbName_07.asm /prod_dbName_data/asmData/nfs_data_dbName_08.asm /prod_dbName_data/asmData is a filesystem on the OS. Thanks for any insights (and apologies if this is a seemingly simple question :) Regards, Chris