Brief connectivity problem between group replication volumes and RPA
Summary: Brief connectivity problem between group replication volumes and RPA
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Symptoms
From logger:/sr/138220/extracted.rp-unit-ltc.KBox1.2016.11.28.10.22.12/processes/InfoCollect/showDevs.sh
this will show __revision 00__:
0x7c0a8452d1db4f0b=>(NaaRawGuid=Vector(96,6,1,96,172,96,65,0,253,128,44,88,227,201,206,40),
oldRawGuid=Option(Vector(96,6,1,96,172,96,65,0,253,128,44,88,227,201,206,40)),
vendor=DGC,product=VRAID,model=Option(Unity 400F),capacity=Option(1288490188800),
niceName=Option(apl-sub01-RP-6036-VM-LTC-400FA_S7B-R (279)),serialNumber=CKMxxxxxxxxxxx,
bIsSymmTaggedDevice=NoOption,symmDevID=NoOption,numPaths=4,controllerIDs=Set(SP-A,SP-B),
geometry=Option((bytesPerSector=512,numberOfHeads=1,sectorsPerTrack=160,numberOfCylinders=15728640)),
revision=00,bIsFTSVolume=0,numSymmTargets=0,bIsUsable=1)
this log extract would appear (usually but not exclusiviely) in replication logs
2016/11/28 09:41:44.788 - #2 - 7602/7485 - MultiPath: handleReservationConflict: cannot resolve reservation conflict m_volume = 0x7c0a8452d1db4f0b m_basePath = (0x500124820066815e,0x5006016747e00819,0x24,e_fiberChannel)
IO error due to reservation conflict will cause replication to stop.
Event from the logs:
Brief connectivity problem between group replication volumes and RPA
Time: Mon Dec 5 15:00:38 2016
Time Zone: GMT
Topic: RPA
Scope: NORMAL
Level: ERROR & CLEAR
Event ID: 16061
Cluster: rp-unit-ltc
Global links: None
RPA access:
RPAs:
RPA: RPA 1
Groups whose replication volumes are affected: [XXX, XXX]
Summary: Brief connectivity problem between group replication volumes and RPA
Service Request info: N/A............................................
Impacted Configuration & Settings [Replication Mode,Splitter Type,Compression,CDP/CLR/Multi,FC/IP/iSCSI, Policies etc.]: Unity Midrange Storage Array, in situations such as adding and Rset and reservation conflicts occur.
Impact on RP: RP is unable to penetrate the reservation conflict
this will show __revision 00__:
0x7c0a8452d1db4f0b=>(NaaRawGuid=Vector(96,6,1,96,172,96,65,0,253,128,44,88,227,201,206,40),
oldRawGuid=Option(Vector(96,6,1,96,172,96,65,0,253,128,44,88,227,201,206,40)),
vendor=DGC,product=VRAID,model=Option(Unity 400F),capacity=Option(1288490188800),
niceName=Option(apl-sub01-RP-6036-VM-LTC-400FA_S7B-R (279)),serialNumber=CKMxxxxxxxxxxx,
bIsSymmTaggedDevice=NoOption,symmDevID=NoOption,numPaths=4,controllerIDs=Set(SP-A,SP-B),
geometry=Option((bytesPerSector=512,numberOfHeads=1,sectorsPerTrack=160,numberOfCylinders=15728640)),
revision=00,bIsFTSVolume=0,numSymmTargets=0,bIsUsable=1)
this log extract would appear (usually but not exclusiviely) in replication logs
2016/11/28 09:41:44.788 - #2 - 7602/7485 - MultiPath: handleReservationConflict: cannot resolve reservation conflict m_volume = 0x7c0a8452d1db4f0b m_basePath = (0x500124820066815e,0x5006016747e00819,0x24,e_fiberChannel)
IO error due to reservation conflict will cause replication to stop.
Event from the logs:
Brief connectivity problem between group replication volumes and RPA
Time: Mon Dec 5 15:00:38 2016
Time Zone: GMT
Topic: RPA
Scope: NORMAL
Level: ERROR & CLEAR
Event ID: 16061
Cluster: rp-unit-ltc
Global links: None
RPA access:
RPAs:
RPA: RPA 1
Groups whose replication volumes are affected: [XXX, XXX]
Summary: Brief connectivity problem between group replication volumes and RPA
Service Request info: N/A............................................
Impacted Configuration & Settings [Replication Mode,Splitter Type,Compression,CDP/CLR/Multi,FC/IP/iSCSI, Policies etc.]: Unity Midrange Storage Array, in situations such as adding and Rset and reservation conflicts occur.
Impact on RP: RP is unable to penetrate the reservation conflict
Cause
RP code for penetrating the reservation conflict is calculated based on legacy VNX revision code.
the Unity array returns code 00 therefore RP considers this array not supporting reservation conflict penetration
the Unity array returns code 00 therefore RP considers this array not supporting reservation conflict penetration
Resolution
Fixed at: target for 5.0.1 or 5.1
Workaround:
change tweak t_RsrvUseClariionPenetrationKeyFromRevision = from 26 to 0 on all RPAs that access the Unity array and reboot each one after changing the tweak
Workaround:
change tweak t_RsrvUseClariionPenetrationKeyFromRevision = from 26 to 0 on all RPAs that access the Unity array and reboot each one after changing the tweak
Products
Dell EMC Unity Family |Dell EMC Unity All FlashArticle Properties
Article Number: 000054740
Article Type: Solution
Last Modified: 12 Dec 2025
Version: 3
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