Note: The information contained in this article is structured as help information for the System Management Interface Tool (SMIT) and is not intended for general reading.
This attribute indicates T10 protection (Data Integrity Field)enablement for a disk. To enable T10 protection on disk, set the attribute to yes. You may fail to set this attribute to yes in case the disk/LUN does not support this feature. You can set the attribute to yes if all paths to disk support T10 protection and the disk also supports this feature.
This attribute indicates the current type of T10 protection on a disk. For more information about T10 protection types, refer SBC specification.
Setting this attribute to Yes indicates that the T10 protection feature is enabled on the adapter. If you specify No, the T10 protection feature of the adapter is disabled.
The controller health check sequence is started after a storage fabric transport failure has been detected. The cntl_delay_time attribute determines the maximum duration in seconds, which the controller health check sequence is active. If a controller health check command completes successfully, detecting an available path, then the controller health check sequence exit permitting I/O to resume. At the end of the controller health check sequence, if no paths are detected as good, then all pending and subsequent I/O to the device fails, until the device health checker detects a failed path has returned.
While the controller health check sequence is active, the cntl_hcheck_interval attribute is the amount of time in seconds, which the next set controller health check commands is issued. cntl_hcheck_interval should be less than the cntl_delay_time, unless set to 0, disabled. If either cntl_delay_time or cntl_hcheck_interval are set to 0, then this feature is disabled.
Controls the RAID adapter's caching function and should always be left at Default.
This setting permits the existing RAID Array optimization settings to be either preserved or cleared. If the setting is set to cleared, all arrays are optimized on the primary adapter. Anytime the primary changes, the arrays are optimized on the new primary.
Specifies the maximum number of devices (LUNs) under the adapter. The default should be sufficient.
Specifies the maximum number of commands that can be outstanding at the adapter for attached JBOD, RAID and SATA devices. For example, a value of "20,30,8" indicates a JBOD limit of 20, RAID limit of 30 and a SATA limit of 8 commands. If there are 2 JBOD disks and one has 5 commands active, the other disk is limited to at most 15 commands at that time.
The sum of all outstanding commands cannot exceed a adapter specific hard limit. When increasing the queue_depth on disk devices, the command limit on the parent SAS adapter may have to be increased.
Specifies the total size of all outstanding data transfer in bytes for JBOD, RAID and SATA devices. The Direct memory access (DMA) window may have to be increased when increasing the command elements, disk queue depth, and/or the IO transfer size. For example, a value of 0x2000000, 0x4000000, and 0x1000000 indicates a DMA window of 32MB for JBOD, 64MB for RAID and 16MB for SATA transfers. The total DMA window cannot exceed a system or PCI slot dependent limit.