Some attachment restrictions apply to FlashCopy and Remote
Mirror and Copy processing.
The source and target volumes should be on different host systems when
you copy a source volume to a target volume with FlashCopy® or Remote Mirror and Copy.
The source and target volumes should be on different host systems when you
require 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 host system sees two
identical volumes.
When the copy operation creates the same identification for the target
volume as for the source volumes, you are not able to distinguish one from
the other. Therefore, you might not be able to access the original data.
Note: You
cannot create a host target on a single Novell NetWare host system. For Novell
NetWare, the target volume must be attached to a second Novell NetWare host
system.
The target volume and the source volume can be on the same host system
for a Remote Mirror and Copy or FlashCopy operation only under the
following conditions:
- For AIX®,
when the host system is using a logical volume manager (LVM) with recreatevg command
support.
- For AIX and
Sun, when the host system is not using a logical volume manager.
- For HP using fibre-channel, when the host is using LVM with 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.