Adding a Cache, Meta, or Log Device to an Existing Storage Pool (BUI)

Use the following task to add a log, read cache, or meta device to an existing storage pool.

Before You Begin

For recommendations on how many drives to select per pool, as well as other considerations and guidelines, see Storage Pool Concepts.
You must select the same data profile currently used in the existing pool. To understand the different data profiles, see Data Profiles for Storage Pools.
Do not perform a pool configuration operation while a disk firmware upgrade is occurring. To check if an upgrade is in progress, from the Maintenance menu, select System.
A meta device must be a 3.2 TB (minimum) SSD to support the enhanced data deduplication feature available in software version OS8.7.0 or later.

Install the new log, read cache, or meta device into the first available and appropriate slot. To determine the appropriate slot, see Disk Shelf Configurations in Oracle ZFS Storage Appliance Customer Service Manual, Release OS8.8.x.
From the Configuration menu, select Storage.
From the Available Pools list, select an online pool to which to add the device.
Click ADD.
Select the device to add to the pool, and click COMMIT.
Select the appropriate profiles.
- For log devices, click Log Profile and select either the mirrored or striped profile. Use the mirrored profile if the pool now contains an even number of log devices.
  
  Caution:
  A double failure can cause loss of data from a log in a striped configuration. It is highly recommended to configure a mirrored log profile for added redundancy. For more information, see Data Profiles for Storage Pools.
- For cache devices, the profile is always striped, as shown under Cache Profile.
- For meta devices, click Metadata Profile and select either the mirrored or striped profile. The striped profile is recommended for better performance in the event of a meta device failure.
Click COMMIT.