Summary of ASM Disk Group Attributes

ASM Disk group attributes are parameters that are bound to a disk group, these attributes can be set when a disk group is created or altered.

Here is the list of attributes:

ACCESS_CONTROL.ENABLED
ACCESS_CONTROL.UMASK
AU_SIZE
CELL.SMART_SCAN_CAPABLE
CELL.SPARSE_DG
COMPATIBLE.ASM
COMPATIBLE.RDBMS
COMPATIBLE.ADVM
CONTENT.CHECK
CONTENT.TYPE
DISK_REPAIR_TIME
FAILGROUP_REPAIR_TIME
IDP.BOUNDARY and IDP.TYPE
PHYS_META_REPLICATED
SECTOR_SIZE
STORAGE.TYPE
THIN_PROVISIONED

Lets see an example:

oragrid@irafmdr01:~$ asmcmd lsattr -G DATA_USG -l
Name                        Value
access_control.enabled      FALSE
access_control.umask        066
appliance._partnering_type  EXADATA FIXED
appliance.mode              TRUE
au_size                     4194304
cell.smart_scan_capable     TRUE
cell.sparse_dg              allnonsparse
compatible.asm              12.1.0.2.0
compatible.rdbms            11.2.0.4.0
content.check               FALSE
content.type                data
disk_repair_time            3.6h
failgroup_repair_time       24.0h
idp.boundary                auto
idp.type                    dynamic
logical_sector_size         512
phys_meta_replicated        true
sector_size                 512
thin_provisioned            FALSE
oragrid@irafmdr01:~$

If you want to check from SQL then use the below SQL.

SQL> SELECT dg.name as diskgroup, SUBSTR(a.name,1,20) as name,
     SUBSTR(a.value,1,25) AS value FROM V$ASM_DISKGROUP dg, V$ASM_ATTRIBUTE a
     WHERE dg.group_number = a.group_number
     and a.name like '%smart%';  2    3    4

DISKGROUP                      NAME                     VALUE
------------------------------ ------------------------ ------------------------
DATA_DG1                       cell.smart_scan_capable  TRUE
DBFS_DG1                       cell.smart_scan_capable  TRUE
RECO_DG1                       cell.smart_scan_capable  TRUE