Lun Manager; Thin Provisioning; Data Retention - HP XP P9500 User Manual

LUN Manager

LUN Manager operations do not affect Continuous Access Journal operations. Volumes that
are under secure ports and/or are assigned to host groups can also be assigned to Continuous
Access Journal pairs. Volumes that are assigned to Continuous Access Journal pairs can be
protected by LUN Manager.
Continuous Access Journal S-VOLs cannot be accessed by any UNIX or PC server host except
when the pair is split.

Thin Provisioning

You can create a Continuous Access Journal pair by specifying V-VOL (Thin Provisioning virtual
volume).
V-VOLs can be either the Continuous Access Journal P-VOL or S-VOL, or both P-VOL and S-VOL.
V-VOLs cannot be used for Continuous Access Journal journal volumes.
You can use V-VOLs that are used by a Business Copy pair or a that are in an Auto LUN's
migration plan. To do so:
1. Delete the Business Copy pair and disable the Auto LUN setting.
2. Create the Continuous Access Journal pair.
3. Re-create the Business Copy pair and the Auto LUN migration plan.
When specifying a V-VOL that has allocated pages to a Continuous Access Journal S-VOL,
be aware that used pool capacity will become temporarily larger than the actual capacity,
because pages must be reallocated in the V-VOL. Therefore, before creating the pair:
Make sure that V-VOL pool capacity is sufficient.
◦
◦ Make sure that the pool-VOLs, which are added to a pool, are not blocked. If the
pool-VOLs are blocked, restore the volume status and then create the pair.
Be aware that when a V-VOL is used as the Continuous Access Journal S-VOL, you might not
be able to update the Continuous Access Journal S-VOL because the capacity of the pool-VOL
is full. In this instance:
The Continuous Access Journal status changes to PFUS
◦
◦ The Remote Web Console status changes to PSUS
The pair is suspended
◦

Data Retention

You can create a Continuous Access Journal pair using volumes that have been assigned the access
attribute by the Data Retention. However, you cannot specify a volume with the "S-VOL Disable"
attribute as a Continuous Access Journal S-VOL.
The following table shows whether the access attribute can be changed or referenced for the
displayed Continuous Access Journal volume and status.
Following this table you will find another table showing the changes you can make to the access
attribute when the Continuous Access Journal P-VOL status is PAIR or COPY.
Table 23 Status, availability of Data Retention operation
Cnt Ac-J
volume
P-VOL
128 Sharing Continuous Access Journal volumes
Pair status Changing access attribute
SMPL Yes
COPY See next table.
PAIR See next table.
PSUS Yes
Referencing access attribute
Yes
Yes
Yes
Yes