Preserve Mirror reason codes

When ANTRQST returns to the caller from an ANTRQST QFRVOLS request that specifies that Preserve Mirror checking is to be done, and the RETINFO return and reason code, as well as the ANTQFRVL header return code, are all zero, then each volume entry has one of the following values. Note that there is a capability check for Preserve Mirror but not a capability check for Preserve Mirror Preferred or Preserve Mirror Required. The software will need to consider the returned information and make a determination if a Preserve Mirror Preferred request may be successful.

Preserve Mirror Capable	Preserve Mirror Capable Reason	Description
1	0 (X'00')	The request is Preserve Mirror capable.
0	-	The request is not Preserve Mirror capable. The reason will have a non-zero value indicating the current cause for being incapable.
0	1 (X'01')	Maximum number of FlashCopy® relationships exist for the secondary volume.
0	4 (X'04')	The volume's secondary is a concurrent copy source volume.
0	5 (X'05')	The volume's secondary is an XRC source volume.
0	6 (X'06')	The volume's secondary is currently inhibited from starting any FlashCopy operations.
0	7 (X'07')	A volume level (version 1) FlashCopy relationship is active on the volume's secondary.
0	8 (X'08')	The maximum number of relationships has been reached for the volume's secondary's control unit.
0	9 (X'09')	The volume's secondary is inaccessible; capability information could not be obtained.
0	10 (X'0A')	The volume's secondary is a cascaded Global Mirror primary.
0	11 (X'0B')	A full volume target relationship exists on the volume's secondary.
0	12 (X'0C')	A full volume source relationship exists on the volume's secondary and target capability checking was requested.
0	13 (X'0D')	The maximum number of full volume source relationships exist on the secondary volume and source checking capability checking was requested.
0	128 (X'80')	The volume is not a PPRC primary volume. For target checking, this can be considered capable, as it would be a FlashCopy to a simplex device. DFSMS considers this capable.
0	129 (X'81')	The volume's secondary and the control volume's secondary are not in the same Storage Facility Image (SFI).
0	130 (X'82')	The volume's PPRC relationship is not full duplex.
0	131 (X'83')	The volume's secondary control unit does not have the microcode installed that supports a preserve mirror operation.
0	132 (X'84')	The control volume is not a PPRC primary device.
0	133 (X'85')	The command was received while the subsystem was attempting to install a new microcode load and the microcode level of one or both CECs does not support a Preserve Mirror operation.
0	134 (X'86')	An error was detected when sending the FlashCopy capability command to the volume's secondary.
0	135 (X'87')	The volume is space efficient and target capability was requested.