HP XP P9500 Storage - Manual (Page 401)

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YKQUERY
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YKRESYNC REVERSE
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YKEWAIT GOTO(DUPLEX)
5. From the local site, execute the YKRESYNC DELTAJNL command for the delta resync pair.
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YKQUERY
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YKRESYNC DELTAJNL
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YKEWAIT GOTO(DUPLEX)
If the command is successful, the Continuous Access Journal Z copy pair is automatically
moved to the HOLD status (delta resync pair).
6. Start primary site host maintenance.
Using a Delta Resync Configuration 401