- Notes, cautions, and warnings
- Getting to Know PowerFlex
- Architecture
- Architecture
- System
- The MDM cluster
- Virtual IP Address
- Storage definitions
- Replication
- Protection and load balancing
- Cache
- Networking
- Monitor of SDC connections
- S.M.A.R.T. hardware monitoring
- Snapshots
- Performance
- Migrate volumes
- Implementing PowerFlex
- PowerFlex implementation in an ESXi-based system
- Other functions
- Maintenance
- Management tools
- PowerFlex VASA architecture
- Configuring direct attached storage (DAS)
- Architecture
Getting to know Dell PowerFlex v3.6.x
In-flight checksum
This feature addresses errors that change the payload during the transit through PowerFlex. PowerFlex protects data in-flight by calculating and validating the checksum value for the payload at both ends.
NOTE:The feature is off by default for Medium Granularity.
NOTE: The checksum feature may have a significant impact on large block I/O latency. Contact Customer Support for more information.
- During write operations, the checksum is calculated when the SDC receives the write request from the application. This checksum is validated before each SDS writes the data on the storage device.
- During read operations, the checksum is calculated when the data is read from the SDS device, and the SDC validates the data before it returns to the application. If the validating end detects a discrepancy, it initiates a retry. The checksum is done in the granularity of a sector (1/2KB).
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