Sun Storage 9990V System
 
Sun Storage 9970 System
 
Sun Storage 9990 System
 
Sun Storage 9960 System
 
Sun Storage 9985 System
 
Sun Storage 9980 System
 

GCS>Sun Microsystems>Storage - Disk>Datacenter Disk
 

/usr/bin/paircreate -g na3-arch-dgt -f async 5 -vl
paircreate: [EX_CMDRJE] An order to the control/command device was rejected Refer to the command log(/HORCM/log120/horcc_ops-stgmgt1-1-sjl.log) for details.

/usr/bin/pairvolchk -g na3-arch-dgt
pairvolchk : execution error.
pairvolchk: [EX_ENQCTG] Unmatched CTGID within the group
Refer to the command log(/HORCM/log120/horcc_ops-stgmgt1-1-sjl.log) for details.

/usr/bin/pairdisplay -g na3-arch-dgt -fcx
Group PairVol(L/R) (Port#,TID, LU),Seq#,LDEV#.P/S,Status,Fence, %,P-LDEV# M
na3-arch-dgt disk0(L) (CL1-A , 0, 0)32487 0.P-VOL COPY ASYNC ,0 a00 -
na3-arch-dgt disk0(R) (CL1-R ,12, 0)23405 a00.S-VOL COPY ASYNC ,----- 0 -
na3-arch-dgt disk1(L) (CL1-A , 0, 1)32487 1.P-VOL COPY ASYNC ,0 a01 -
na3-arch-dgt disk1(R) (CL1-R ,12, 1)23405 a01.S-VOL COPY ASYNC ,----- 1 -
na3-arch-dgt disk2(L) (CL1-A , 0, 2)32487 2.SMPL ---- ------,----- ----- -
na3-arch-dgt disk2(R) (CL1-R ,12, 2)23405 a02.SMPL ---- ------,----- ----- -
na3-arch-dgt disk3(L) (CL1-A , 0, 3)32487 3.SMPL ---- ------,----- ----- -

After a few minutes the pair status changed to Suspended Error state:

/usr/bin/pairdisplay -g na3-arch-dgt -fcx
Group PairVol(L/R) (Port#,TID, LU),Seq#,LDEV#.P/S,Status,Fence, %,P-LDEV# M
na3-arch-dgt disk0(L) (CL1-A , 0, 0)32487 0.P-VOL PSUE ASYNC , 0 a00 -
na3-arch-dgt disk0(R) (CL1-R ,12, 0)23405 a00.S-VOL SSUS ASYNC , 100 0 -
na3-arch-dgt disk1(L) (CL1-A , 0, 1)32487 1.P-VOL PSUE ASYNC , 0 a01 -
na3-arch-dgt disk1(R) (CL1-R ,12, 1)23405 a01.S-VOL SSUS ASYNC , 100 1 -

They attempted to create the pair for a single device and the command was not rejected but the same symptoms followed (Copy -> PSUE/SSUS). We had the customer remove the RCU links and recreate them and then attempt to create the pairs from the TC GUI in Storage Navigator. The same symptoms occurred from the GUI as well. The paircreate would start and the first two pairs would show Copy status and then move to PSUE/SSUS status shortly after. None of the other device would even show Copy status, they still showed SMPL.

SyErr E/F MP# Date Time SSBNo R.SSB Detail Info.

C870 9F 06 07/05/14 18:29:40 20583 0 HRC/HODM stat is SUSPEND(statnoneexept)
CBBE FB 07 07/05/14 18:29:40 20584 0
C870 9F 06 07/05/14 18:29:40 20585 0 HRC/HODM stat is SUSPEND(statnoneexept)
CBBE FB 07 07/05/14 18:29:40 20587 0
CBBE FB 07 07/05/14 18:29:40 20588 0
C73C 9F 46 07/05/14 18:29:43 20589 0 RIO proc boot time exceeded(180s)
C73D 9F 46 07/05/14 18:29:43 20590 0
C828 9F 46 07/05/14 18:29:43 20591 0 SLEEP: RIO job sink(180s)-> permanenterr
C73C 9F 46 07/05/14 18:29:43 20592 0 RIO proc boot time exceeded(180s)
C73D 9F 46 07/05/14 18:29:43 20593 0
C828 9F 46 07/05/14 18:29:43 20594 0 SLEEP: RIO job sink(180s)-> permanenterr
C73C 9F 46 07/05/14 18:29:43 20595 0 RIO proc boot time exceeded(180s)

Analysis of the Cisco MD9509 FCIP switches showed that every time the paircreate command was issued the links would fail. The 9509 reported link failures issues between itself and the IP router. Further analysis of the IP router showed that the MTU was to 1500 while the MTU on the Cisco 9509 switch was set to 4000. Once the customer changed the MTU on the IP router to match the setting on the Cisco 9505 the paircreate was able to complete successfully.

To check the router MTU settings.

Cisco:

show interface fcip NUM (Requires FCIP tunnel to be up)

show tech-support details

An MTU value cannot be set manually but the PMTU flag can be set (default is on) which will attempt to discover the path MTU along the link. If PMTU is turned off, MTU reverts to 1518

Brocade 7500/FR4-18i/FC4-16i blade:

portshow ipif [slot]/geNUM

supportsave

For GE ports on a Silkworm 7500 or an FR4-18i blade in a Silkworm 48000, valid values are from 1500 to 2348. On a FC4-16i in a Silkworm 48000 valid values are from 1500 to 8256.

Brocade AP7420:

fcipshow NUM

supportshow

An MTU value cannot be set but 'Jumbo Support' can be turned on (2k/max FC frame) /off.

McData 1620/2640:

Use Element manager (browser). Advanced TCP/IP Configuration screen.
 <Document: 1002448.1> Collecting McData router information

An MTU of between 512 to 4096 (default 1508) can be manually set or use

Auto discovery (default on)

The MTU is but one of many settings that need to be carefully configured for the router link to work correctly.

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