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7065Admin_Configure.fm
Draft Document for Review August 30, 2007 12:59 am
174
IBM System Storage DS3000: Introduction and Implementation Guide
If a FlashCopy logical drive or FlashCopy repository logical drive is displayed as a missing
logical drive, this means that the storage system could no longer access these drives. Missing
logical drives, in most cases, are recoverable.
8.4.3 Check the status of the FlashCopy premium feature
Use the following procedure to check premium features enabled on the DS3000.
From the DS3000 Subsystem Management window, in the Tools tab select “View / Enable
Premium features” The List Premium Features view opens and lists the enabled premium
features (Figure 8-56 on page 175). Verify that FlashCopy Logical Drives: is
Enabled
. If the
FlashCopy feature is not enabled, enable it as described in 4.4.7, “(Optional) View and enable
premium features” on page 87. Click Configure again to return to the configuration options.
Attention: Do not ignore the FlashCopy repository logical drive
threshold exceeded
notification.
Note: Using a defragmentation utility to defragment a base logical drive with an associated
FlashCopy repository logical drive will cause a copy-on-write of every data block in the
base logical drive. This can cause the FlashCopy repository logical drive to become full
before the defragmentation operation is completed.
To prevent this from happening, during a base logical drive defragmentation, ensure that
the FlashCopy repository logical drives' capacity is set to 105% of the size of the base
logical drive before starting the defragmentation utility. This is the minimum size needed to
support a copy-on-write of every data block in the base logical drive.