Activate synchronous mirroring
The activate storageArray feature
command activates the Synchronous Mirroring feature and creates the mirror repository volume.
Supported Arrays
This command applies to any individual storage array, including the E4000, E2700, E5600, E2800, and E5700 arrays, as long as all SMcli packages are installed.
Roles
To execute this command on an E4000, E2800, or E5700 storage array, you must have the Storage Admin role.
Context
When you use this command, you can define the mirror repository volume in one of three ways:
-
User-defined drives
-
User-defined volume group
-
User-defined number of drives
If you choose to define a number of drives, the controller firmware chooses which drives to use for the mirror repository volume.
In previous versions of this command, the feature identifier was |
Syntax (user-defined drives)
activate storageArray feature=syncMirror
repositoryRAIDLevel=(0 |1 | 3 | 5 | 6)
repositoryDrives=(trayID1,[drawerID1,slotID1 ... trayIDn,pass:quotes[[drawerIDn,slotIDn
[driveType=(fibre | SATA | SAS | NVMe4K)
)
[repositoryVolumeGroupUserLabel="volumeGroupName"]
[trayLossProtect=(TRUE | FALSE)]
[drawerLossProtect=(TRUE | FALSE)]
[dataAssurance=(none | enabled)]
activate storageArray feature=syncMirror
repositoryRAIDLevel=(0 |1 | 5 | 6)
repositoryDrives=(trayID1,[drawerID1,]slotID1 ... trayIDn,[drawerIDn,]slotIDn)
[repositoryVolumeGroupUserLabel="volumeGroupName"]
[trayLossProtect=(TRUE | FALSE)]
[drawerLossProtect=(TRUE | FALSE)]
[dataAssurance=(none | enabled)]
Syntax (user-defined volume group)
activate storageArray feature=syncMirror
repositoryVolumeGroup=volumeGroupName
[freeCapacityArea=freeCapacityIndexNumber]
Syntax (user-defined number of drives)
activate storageArray feature=syncMirror
repositoryRAIDLevel=(1 | 3 | 5 | 6)
repositoryDriveCount=numberOfDrives
[repositoryVolumeGroupUserLabel="volumeGroupName"]
[trayLossProtect=(TRUE | FALSE)]
[drawerLossProtect=(TRUE | FALSE)]
[dataAssurance=(none | enabled)]
activate storageArray feature=syncMirror
repositoryRAIDLevel=(1 | 5 | 6)
repositoryDriveCount=numberOfDrives
[repositoryVolumeGroupUserLabel="volumeGroupName"]
[trayLossProtect=(TRUE | FALSE)]
[drawerLossProtect=(TRUE | FALSE)]
[dataAssurance=(none | enabled)]
Parameters
Parameter | Description |
---|---|
|
The RAID level for the mirror repository volume. Valid values are |
|
The drives for the mirror repository volume. For high-capacity drive trays, specify the tray ID value, the drawer ID value, and the slot ID value for the drive. For low-capacity drive trays, specify the tray ID value and the slot ID value for the drive. Tray ID values are All slot ID maximums are 24. Slot ID values either begin at 0 or 1, depending on the tray model. Drive trays compatible with E2800 and E5700 controllers have slot ID numbers starting at 0. Drive trays compatible with E2700 and E5600 controllers have slot ID numbers starting at 1. Enclose the tray ID value, the drawer ID value, and the slot ID value in square brackets ([ ]). |
|
The name that you want to give the new volume group in which the mirror repository volume will be located. Enclose the volume group name in double quotation marks (" "). |
|
The name of the mirror repository volume group where the mirror repository volume is located. (To determine the names of the volume groups in your storage array, run the |
|
The index number of the free space in an existing volume group that you want to use to create the mirror repository volume. Free capacity is defined as the free capacity between existing volumes in a volume group. For example, a volume group might have the following areas: volume 1, free capacity, volume 2, free capacity, volume 3, free capacity. To use the free capacity following volume 2, you would specify: freeCapacityArea=2 Run the |
|
The number of unassigned drives that you want to use for the mirror repository volume. |
|
The type of drive for which you want to retrieve information. You cannot mix drive types. Valid drive types are:
If you do not specify a drive type, the command defaults to all type. |
|
The setting to enforce tray loss protection when you create the mirror repository volume. To enforce tray loss protection, set this parameter to |
|
The setting to enforce drawer loss protection when you create the mirror repository volume. To enforce drawer loss protection, set this parameter to |
Notes
The repositoryDrives
parameter supports both high-capacity drive trays and low-capacity drive trays. A high-capacity drive tray has drawers that hold the drives. The drawers slide out of the drive tray to provide access to the drives. A low-capacity drive tray does not have drawers. For a high-capacity drive tray, you must specify the identifier (ID) of the drive tray, the ID of the drawer, and the ID of the slot in which a drive resides. For a low-capacity drive tray, you need only specify the ID of the drive tray and the ID of the slot in which a drive resides. For a low-capacity drive tray, an alternative method for identifying a location for a drive is to specify the ID of the drive tray, set the ID of the drawer to 0
, and specify the ID of the slot in which a drive resides.
If the drives that you select for the repositoryDrives
parameter are not compatible with other parameters (such as the repositoryRAIDLevel
parameter), the script command returns an error, and Synchronous Mirroring is not activated. The error returns the amount of space that is needed for the mirror repository volume. You can then re-enter the command, and specify the appropriate amount of space.
If you enter a value for the repository storage space that is too small for the mirror repository volumes, the controller firmware returns an error message that provides the amount of space that is needed for the mirror repository volumes. The command does not try to activate Synchronous Mirroring. You can re-enter the command by using the value from the error message for the repository storage space value.
When you assign the drives, if you set the trayLossProtect
parameter to TRUE
and have selected more than one drive from any one tray, the storage array returns an error. If you set the trayLossProtect
parameter to FALSE
, the storage array performs operations, but the volume group that you create might not have tray loss protection.
When the controller firmware assigns the drives, if you set the trayLossProtect
parameter to TRUE
, the storage array returns an error if the controller firmware cannot provide drives that result in the new volume group having tray loss protection. If you set the trayLossProtect
parameter to FALSE
, the storage array performs the operation even if it means that the volume group might not have tray loss protection.
The drawerLossProtect
parameter determines whether data on a volume is accessible if a drawer fails. When you assign the drives, if you set the drawerLossProtect
parameter to TRUE
and select more than one drive from any one drawer, the storage array returns an error. If you set the drawerLossProtect
parameter to FALSE
, the storage array performs operations, but the volume group that you create might not have drawer loss protection.
Data assurance management
The Data Assurance (DA) feature increases data integrity across the entire storage system. DA enables the storage array to check for errors that might occur when data is moved between the hosts and the drives. When this feature is enabled, the storage array appends error-checking codes (also known as cyclic redundancy checks or CRCs) to each block of data in the volume. After a data block is moved, the storage array uses these CRC codes to determine if any errors occurred during transmission. Potentially corrupted data is neither written to disk nor returned to the host.
If you want to use the DA feature, start with a pool or volume group that includes only drives that support DA. Then, create DA-capable volumes. Finally, map these DA-capable volumes to the host using an I/O interface that is capable of DA. I/O interfaces that are capable of DA include Fibre Channel, SAS, and iSER over InfiniBand (iSCSI Extensions for RDMA/IB). DA is not supported by iSCSI over Ethernet, or by the SRP over InfiniBand.
When all the drives are DA-capable, you can set the |
If the dataAssurance
parameter is set to enabled
, only data assurance capable drives will be considered for volume candidates; otherwise, both data assurance capable and non-data assurance capable drives will be considered. If only data assurance drives are available the new volume group will be created using the enabled data assurance drives.
Minimum firmware level
7.10 adds RAID Level 6 capability.
7.60 adds the drawerID
user input, the driveMediaType
parameter, and the drawerLossProtect
parameter.
7.75 adds the dataAssurance
parameter.
8.10 removes the driveMediaType
parameter.
8.60 adds the driveType
parameter.