HP XP for Compatible Extended Remote Copy Software (XRC) - Questions & Answers

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1.	How does HP XP for Compatible Extended Remote Copy (XRC) Software differ from Hitachi TrueCopy Async for Mainframe?
2.	Is HP XP for Compatible Extended Remote Copy (XRC) Software compatible with IBM GDPS?
3.	How is HP XP for Compatible Extended Remote Copy (XRC) Software licensed?

Q1.	How does HP XP for Compatible Extended Remote Copy (XRC) Software differ from Hitachi TrueCopy Async for Mainframe?
A1.	XRC is a host-based software implementation that takes advantage of special XRC microcode features in the disk array. It uses host channels (ESCON or FICON) to copy data from the local array to the host on which SDM resides, and then the host writes the data to the remote array. Because HP XP Compatible Extended Remote Copy (XRC) Software is completely compatible with IBM Extended Remote Copy, the local and remote disk arrays can be any combination of mainframe compatible IBM disk arrays and XP disk arrays. Hitachi TrueCopy Async for Mainframe is a remote copy implementation based on the XP disk array, and requires no host intervention. It uses Fibre channel links to transmit data between the local and remote disk arrays. Both the local and remote disk arrays must be XP disk arrays. TrueCopy Async is bundled in with HP XP Continuous Access Asynchronous and with HP XP Continuous Access Journal, and is not sold independently.

Q2.	Is HP XP for Compatible Extended Remote Copy (XRC) Software compatible with IBM GDPS?
A2.	Yes, XRC can be implemented in an IBM GDPS solution.

Q3.	How is HP XP for Compatible Extended Remote Copy (XRC) Software licensed?
A3.	XRC is licensed on total capacity of XRC primary volumes on the array. Also add the total capacity of XRC secondary volumes on the array if reverse copy will be used for recovery operations.

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