HP Storage Mirroring Software - Manual (Page 199)

Repository server management Page 198 of 214
NTFS change journal already exists, the existing change journal will be
used with the size and growth values originally specified.
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Storage bin location—Specify the location where the single copy of the
redundant files will be stored. Do not select the system volume.
Note: If you set the storage bin location during another protection setup, the option
to set a storage bin location will not be available. Instead, you will need to
move the storage bin , if desired.
After you begin deduplication, a scan will begin looking for duplicates within the
selected volumes. As long as deduplication is enabled, it will also monitor the NTFS
change journal, in real-time, to discover modified or new files that should be inspected
for deduplication.