A logical storage area extracted from a parity group is used as an LDEV (basic volume). To create an LDEV to be used for operations such as volume allocation or pool creation, you need to create a parity group in advance.
Parity group operations performed by the REST API vary depending on the type of storage system.
- For VSP E series
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- Creating a parity group
You can create a parity group when installing a new storage system or adding drives. You can configure a distributed parity group, or specify settings to encrypt a parity group or specify copy-back mode.
- Changing the drive settings
You can assign a specified drive as a spare drive, or release the assignment. The spare drive is used when a failure occurs in a drive that configures a parity group.
- Formatting a parity group
You can format all volumes created from a parity group. When you create multiple volumes at the time a new storage system is installed or drives are added, you can collectively format the volumes.
- Deleting a parity group
You can delete a parity group. If the specified parity group is a parity group making up a distributed parity group, all concatenated parity groups are deleted.
- Creating a parity group
- For VSP G350, G370, G700, G900, VSP F350, F370, F700, F900
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- Creating a parity group
You can create a parity group when installing a new storage system or adding drives. You can configure a distributed parity group, or specify settings to encrypt a parity group or specify copy-back mode.
- Changing the drive settings
You can assign a specified drive as a spare drive, or release the assignment. The spare drive is used when a failure occurs in a drive that configures a parity group.
- Changing the accelerated compression setting of a parity group
You can enable or disable the accelerated compression setting for a parity group for which the accelerated compression function is supported.
- Formatting a parity group
You can format all volumes created from a parity group. When you create multiple volumes at the time a new storage system is installed or drives are added, you can collectively format the volumes.
- Deleting a parity group
You can delete a parity group. If the specified parity group is a parity group making up a distributed parity group, all concatenated parity groups are deleted.
- Creating a parity group
- For VSP 5000 series
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- Changing the accelerated compression setting of a parity group
You can enable or disable the accelerated compression setting for a parity group for which the accelerated compression function is supported.
- Formatting a parity group
You can format all volumes created from a parity group. When you create multiple volumes at the time a new storage system is installed or drives are added, you can collectively format the volumes.
- Changing the accelerated compression setting of a parity group
For details on parity groups, see the Provisioning Guide, or the Provisioning Guide for Open Systems.