Advanced functions for HDS Lightning

Some advanced functions of the HDS Lightning are not supported by the system.

Advanced copy functions

Advanced copy functions for HDS Lightning (for example, ShadowImage, Remote Copy, and Data Migration) are not supported for disks that are managed by the system, because the copy function does not extend to the system cache.

Logical Unit Size Expansion

The HDS Lightning 99xxV supports Logical Unit Expansion (LUSE). LUSE is not a concurrent operation. LUSE is accomplished by concatenating between 2 and 26 existing logical units (LUs) together. Before LUSE can be performed on an LU, the LU must be removed from the storage pool and unmapped from the system.

Attention: LUSE destroys all data that exists on the LU, except on a Windows system.

TrueCopy

TrueCopy operations are functionally similar to Metro Mirror. TrueCopy processing is not supported when the disk controller system is used with the FlashSystem 7300 system. Even when an HDS Lightning 99xxV is shared between a host and the FlashSystem 7300 system, TrueCopy processing is not supported on the ports that are zoned directly with the host.

Virtual LVI/LUNs

The HDS Lightning 99xxV supports Virtual LVI/LUNs. Virtual LVI/LUNs is not a concurrent operation. Virtual LVI/LUNs allows you to divide LUNs into several smaller virtual LUNs for use by the HDS Lightning. You must first create existing LUNs into available capacity and then define their own LUNs using that available capacity. Virtual LVI/LUNs must not be managed or mapped to the system.

LUNs that are set up using either LUSE or Virtual LVI/LUNs appear as normal LUNs after they are created. Therefore, LUNs that are set up using LUSE or Virtual LVI/LUNs can be used by the system after they are created.

Write protect

LUs cannot be explicitly set to write-protected. However, some of the advanced features, such as Metro Mirror, can be used to write-protect an LU as part of the function. Metro Mirror must not be used for LUs that are in use by the system.