Access attribute restrictions

When a volume is used by Volume Migration

• Do not assign an access attribute to a volume when Volume Migration operations are being performed.
• If an automatic start time is set in Volume Migration, make sure to assign an access attribute before or after the volume is migrated.

When a volume is used by TrueCopy for Mainframe (TCz) or Universal Replicator for Mainframe (URz)

• Do not assign an access attribute to a volume that is used by TCz or URz. If you assign an access attribute to a TCz or URz volume, the job might end abnormally. If you still want to assign an access attribute to a TCz or URz volume, you must assign the same access attribute to both the primary volume (P-VOL) and the secondary volume (S-VOL) of the pair.
• When creating a TCz or URz pair and using a read-only volume as the P-VOL, use an S-VOL on a storage system on which Volume Retention Manager is enabled.

  If the S-VOL must be on a storage system on which Volume Retention Manager is not enabled, you must do either of the following:

  • Change the access attribute of the P-VOL to read/write.
  • Remove Volume Retention Manager on the primary storage system.
• If you use TCz or URz to create a pair, the P-VOL and the S-VOL will have the same access attribute. Even if you suspend or delete the pair, the access attribute for these volumes will not change.
• If a remote copy pair is suspended during a TCz or URz copy operation and you want to enable the S-VOL read option, you must ensure that the access attribute of the S-VOL is read/write before you enable the S-VOL read option. If the access attribute of the S-VOL is read-only, the S-VOL read option will be disabled. Also, operations such as REFORMAT and REFVTOC cannot be performed for overwriting volume serial numbers (volsers).
• If a volume has the protect attribute, the volume can not be used as a P-VOL or an S-VOL.
  • If the protect attribute is assigned to a volume that is being used by TrueCopy for Mainframe, the pair might be suspended.
  • If the protect attribute is assigned to a volume that is being used by Universal Replicator for Mainframe, the remote copy processing might be discontinued.

When a volume is used by ShadowImage for Mainframe, Compatible FlashCopy^® V2, or Compatible FlashCopy^® SE

If a volume has the protect attribute, the volume cannot be used as a primary volume (P-VOL) or secondary volume (S-VOL) of a ShadowImage for Mainframe pair.

If a volume has the protect attribute, the volume cannot be used as a source volume (S-VOL) or target volume (T-VOL) of a Compatible FlashCopy^® V2 or Compatible FlashCopy^® SE relationship.

When jobs that manipulate data on the volume are in progress

Do not assign an access attribute to the volume. The jobs in progress might be abnormally terminated.

When I/O processing from hosts is being performed on the volume

Do not change the access attribute of the volume. The I/O processing being performed might be abnormally terminated.