HP XP P9500 Storage - Manual (Page 136)

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If a remote copy pair is suspended during a Continuous Access Synchronous Z or Continuous
Access Journal Z copy operation and you want to enable the S-VOL read option on the RCU
(mode 20), 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, mode 20 will
be disabled. Also, operations such as REFORMAT and REFVTOC cannot be performed for
overwriting volume serial numbers.
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If a volume has the Protect attribute, the volume can neither be used as an P-VOL nor an S-VOL.
If the Protect attribute is set to the volume which is being used by Continuous Access
Synchronous Z, the pair might be suspended. ◦
◦ If the Protect attribute is set to the volume which is being used by Continuous Access
Journal Z, the remote copy processing might not be continued.
Business Copy Z, Compatible FlashCopy, and 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) for Business Copy Z; nor can it be used as a source volume (S-VOL) or
target volume (T-VOL) for Compatible FlashCopy or Compatible FlashCopy SE.
Volume Security for Mainframe
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If a logical volume is secured by Volume Security for Mainframe, you must set the Read/Write
attribute on the volume. If you want to assign another access attribute to the logical volume,
you must use Volume Security for Mainframe to remove security from the logical volume.
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If a logical volume has the Read Only attribute or the Protect attribute set, you must not use
Volume Security for Mainframe to secure the logical volume. If you still want to use Volume
Security for Mainframe to secure the logical volume, you must assign the Read/Write attribute
to the logical volume.
Keywords
To control the access to a volume, assign an access attribute to each volume. One of the following
access attributes can be assigned to each logical volume:
Read/Write
If a logical volume has the Read/Write attribute, hosts can perform both read and write operations
on the logical volume.
All volumes have the Read/Write attribute by default.
Read Only
If a logical volume has the Read Only attribute, hosts can perform read operations but cannot
perform write operations on the logical volume.
Protect
If a logical volume has the Protect attribute, hosts cannot access the logical volume. Hosts cannot
perform either read nor write operations on the logical volume.
Assigning access attribute
You can assign access attributes to volumes by using Volume Retention.
CAUTION: Do not perform Volume Retention operations if any other program product is running.
136 Configuring access attributes