VNX: IBM SVC reports LUN/Pool offline

Summary: IBM SVC Mdisk reports a LUN/Pool on VNX as offline, but there is no issues reporting on the array. (User Correctable)

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Symptoms

  • Customer has an IBM SVC virtual environment and there is a LUN/Pool reporting as offline.
  • There are Time-out errors being reported from the IBM SVC Mdisks
Event ID Text      Timeout due to excessive processing time
Error Code         1340
Error Code Text    Managed Disk timeout

 

Cause

  • Timeout errors on IBM SVC nodes
  • Possible Host Locks

 

Resolution

  • Reboot IBM SVC nodes to release all locked LUN(s)
  • Continue to work with IBM to confirm the cluster/virtual environment is configured correctly

 

Additional Information

Review of SP Collects

  • There are no current faults with Read and Write cache enabled.
  • There are no DU issues on the VNX.
  • There have been no SP reboots within the last thirty days.
  • One or more Servers are logged in to all zoned ports.
  • All LUN(s)/Pool(s) are enabled and online.
  • There are no current trespassed LUNs.
  • There are multiple host aborts seen on the LUNs.
POTENTIAL DU or DL ENTRY COUNT INFORMATION:
+--------------------------------------------------------------------+-------------------------------------------------------------+
| (71 / F1) SCSI Sense Deferred Error                        : 0     | (a4d) Parity Checksum Error                             : 0 |
| (684) Parity Reconstructs                                  : 0     | (a4c) Data Checksum Error                               : 0 |
| (689) Sector Reconstructs                                  : 0     | (a4b) Coherency Error                                   : 0 |
| (COH) Extended Status Coherency Errors                     : 0     | (a08) Database Sync Error                               : 0 |
| (a31)ENC not capable of changing speed to match loop speed : 0     | (878) LCC reported a General Fault                      : 0 |
| (957) Uncorrectable Sector                                 : 0     | (953) Uncorrectable Parity Sector                       : 0 |
| (951) CRU Signature Error total/unowned luns/broken luns   : 0/0/0 | (90a) Can't Assign - Cache Dirty                        : 0 |
| (792) Cleared - Cache Dirty                                : 0     | (840) Data Sector Invalidated                           : 0 |
| (904/988/88d) Enc Over temperature                         : 0     | (71248003) NTmirror UCRC                                : 0 |
| (a18/a24) Drive removed by BE fault recovery               : 0/0   | Pool and/or lun requires recovery and/or offline events : 0 |
+--------------------------------------------------------------------+-------------------------------------------------------------+

SP BOOT HISTORY INFORMATION:
Total Reboots:                                              0
Reboots from Bugcheck:                                      0
Reboots from Power Outage:                                  0
Software-Initiated or User-Initiated Reboots or Shutdowns:  0
Unexplained Reboots:                                        0

INITIATORS:     SPA  (Registered Initiator/Logged Initiator): Port0: 0/0,  Port1: 8/8,  Port2: 8/8,  Port3: 0/0,  Port4: 0/0,  Port5: 8/8,  Port6: 8/8,  Port7: 0/0
                SPB  (Registered Initiator/Logged Initiator): Port0: 0/0,  Port1: 8/8,  Port2: 8/8,  Port3: 0/0,  Port4: 0/0,  Port5: 8/8,  Port6: 8/8,  Port7: 0/0

[Ktrace]
[SFP Diag poll Information alarms:00000000 warnings:00000000]
[SPB (FE1/SC)]: 1
[SPB (FE5/SC)]: 1
[SPB (FE6/SC)]: 1
[Target command error: mp context xxx, SCSI status = 0x28:]
SPB   Interface:(FE6/SC)          SCSI status = 0x28   count:183

 

Affected Products

VNX/VNXe

Products

VNX1 Series, VNX2 Series, VNX/VNXe
Article Properties
Article Number: 000056943
Article Type: Solution
Last Modified: 20 May 2026
Version:  5
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.