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August 15, 2017
• To modify the pool properties:
1. On the Export Pool field select Copy Export from the pull down
Note: You will not be able to change this pool setting if the pool has already been associated
with a storage group name. Associating a pool with a storage group name makes that pool a
primary storage pool and a primary storage pool cannot be use for a copy export pool.
2. Select a Borrow Indicator. The setting defines if the pool borrows physical volumes from the
common scratch pool (Pool 00) and whether they are returned to the common scratch pool when
reclaimed. For this example, the pool will borrow and return all volumes assigned to it.
3. Select the 1st & 2nd Media types to be borrowed/returned from/to the common scratch pool (if
borrow was indicated).
4. Select the Reclaim Pool. The default is to the same pool. If the reclaim pool is modified, copy
export disaster recovery capabilities can be compromised. If there is a need to modify the
reclaim pool designated for the copy export pool, the reclaim pool CANNOT be set to the same
value as the primary pool or the reclaim pool designated for the primary pool. If the reclaim pool
for the copy export pool is the same as either of the other two pools mentioned, then primary and
backup copies of a logical volume may exist on the same physical media. If the reclaim pool for
the copy export pool is modified, it is the customer's responsibility to copy export volumes from
the reclaim pool.
5. Select the Maximum Devices. Leave at the default of All Devices unless you want to limit the
number of drives that will be used for copying data from the cache to physical volumes. This
setting specifies how many physical devices the TS7700 may use concurrently when copying
data from cache to the pool. If you set the default or a large value here, you may have many copy
exported physical volumes with small amount of data on each. A value of 1 minimizes the
number of physical volumes used for copy export, but the time to copy data from cache will take
longer. The best value depends on the amount of data exported. For example, if you estimate you
would normally export about 8.0TB data and use JC media, the data could fit on as few as 2
physical volumes, so you may want to set this field to 2. It is possible that an additional volume
may be used depending on drive and physical volume availability when data is copied from the
cache to physical tapes during a copy export operation.
6. Set up the reclamation policies by entering values in the Days without Access, Age of Last
Data Written, Days Without Data Inactivation and Maximum Active Data fields. A value of
1 to 365 days may be specified. If you do not want a policy to be included, set the field to 0. In
this example, all reclaim values have been set to 0. Maximum Active Data defaults to 5%
7. Let Reclaim Threshold Percentage default to 10%.
8. Select the OK button.
© Copyright IBM Corporation, 2017
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