Attachment restrictions for Copy Services
Certain attachment restrictions can apply to standard FlashCopy® and Remote Mirror and Copy features with regard to the host system of the target and source volumes.
When you copy a source volume to a target volume with the FlashCopy or Remote Mirror and Copy feature, the source and target volumes must be on different host systems to enable concurrent read/write access of both volumes.
A copy operation with the source and target volume on the same host system creates a target volume with the same identification as the source volume. The result is that the host system sees two identical volumes. When the copy operation creates the same identification for the target volume as for the source volume, you are not able to distinguish one from the other. Therefore, you might not be able to access the original data.
- For AIX® and Solaris, when the host system is not using a logical volume manager (LVM)
- For AIX, when the host system is using an LVM with recreatevg command support
- For HPE using a Fibre Channel connection, when an LVM accesses a host through the vfchigid -f command
- For any host system, when the host system can distinguish between a source and a target volume that have the same identification