HP P9000 for Compatible XRC User Guide (AV400-96390, October 2011)

Table 1 Features supported by Compatible XRC
XRC3XRC2DescriptionFeature
SupportedSupportedSidefile threshold tuning feature for each volume.DEV blocking
SupportedNot supportedDifferential copy feature for unplanned outage achieved
by the differential bit management in the storage system.
Unplanned outage
SupportedNot supportedAlternate path retry feature for CNT USD
1
connections.CNT MULTI path
Supported
2
Not supportedFix or Float of Utility DEV setting feature.Fix utility
Supported
3
Not supportedSuspend setting feature which does not report SCP from
SDM.
Suspend on Long
Busy
Supported
4
Not supportedFeature to set arbitrary Sleep Time from SDM when the
amount of write data is controlled.
Write Pacing
1
CNT extender (Ultranet Storage Director).
2
Only Fix of Utility DEV is supported (Float is not supported).
3
Operates when Level 2 Suspend is set to Disabled in the option of Compatible XRC. Level 2
Suspend operation will be processed preferentially, when Level 2 Suspend is set to Enable.
4
Operates when Block Option is set to Volume Level in the option of Compatible XRC. Write
Pacing will not operate when Block Option is set to Cache Level.
When the controller emulation type is 2105 or 2107, both XRC2 and XRC3 are supported.
Number of sessions for Compatible XRC and CC
The following table shows the number of supported sessions in Compatible XRC.
Table 2 Number of Compatible XRC sessions
Number of SessionsUnit
Number of CUs x 64Per storage system
64Per CU
1Per volume
The number of Concurrent Copy (CC) and Compatible XRC sessions per volume depends on the
combination of CC and XRC (XRC2 and XRC3). The following table shows the number of sessions
per volume.
Table 3 Number of sessions per volume
Device Emulation Type (3390-1, 3390-2, 3390-3, 3390-3R, 3390-9, 3390-A, 3390-L, 3390-M)Session Type
Number of Compatible XRC SessionsNumber of CC Sessions
N/A16CC only
115CC and XRC2
115CC and XRC3
Requirements and restrictions for Compatible XRC 9