4 Cluster ASM Compliance Standards
Storage Best Practices For Cluster Asm
The compliance rules for the Storage Best Practices For Cluster Asm standard follow.
Disk Group Contains Disks Of Significantly Different Sizes
Description: Checks the disk group for disks with disk sizes which vary by more than 5%.
Severity: Warning
Rationale: Disks in a disk group should have sizes within 5% of each other, unless data migration is in progress. Automatic Storage Management distributes data uniformly proportional to thesize of the disks. For balanced I/O and optimal performance, disks in a given disk group should have similar size and performance characteristics.
Disk Group Contains Disks With Different Redundancy Attributes
Description: Checks the disk group for disks that have different redundancy attributes.
Severity: Warning
Rationale: Disks in the same disk group with different redundancy attributes may offer inconsistent levels of data protection.
Disk Group Depends On External Redundancy And Has Unprotected Disks
Description: Checks the disk group, which depends on external redundancy, for disks that are not mirrored or parity protected.
Severity: Warning
Rationale: Data loss can occur if the disk group depends on external redundancy and disks are not mirrored or parity protected.
Disk Group With Normal Or High Redundancy Has Mirrored Or Parity Protected Disks
Description: Checks the disk group, with NORMAL or HIGH redundancy, for disks that are mirrored or parity protected.
Severity: Minor Warning
Rationale: Disk resources are wasted, and performance may be unnecessarily affected when both a disk and its owning disk group are providing data redundancy.