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VMAX3: No Paths Seen to LUNs After Replaced HBA Using Red Hat Linux

Summary: An HBA was recently replaced. The New HBA (host9) WWN was zoned to the disk array FA; also the new WWN was replaced in the Initiator Group (IG). Despite this, the host is unable to see any paths to the LUNs using the newly replaced HBA. ...

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Symptoms

The LUNs allocated are from the array. The LUNs are replicated with two paths to the local and remote using each HBA (2 x 2 X 2 = 8 paths for each LUN). 

The HBA (host11) is zoned to two ports on both local and remote disk arrays providing four paths to each LUN using this HBA.

The replaced or new HBA (host9) is zoned to two ports on both the local and remote disk arrays. There are no paths to the LUN using this HBA.

The CART report shows all disk array FA (port-5 on both local and remote) for HBA (host9) as shown below:  
host    hba    wwpn
11    QLE2742    21000024ff1b09e5 
did    fa/sp wwn        sn/32 bit seed    fa/sp
0b0400    50000979a8005808    CN49780XXXX  1:08
0b1400    50000979a8005848    CN49780XXXX    2:08
0a1400    50000979a8005448    CN49780YYYY    2:08
0a0400     50000979a8005408     CN49780YYYY     1:8 

host    hba    wwpn
9    QLE2742    2100f4c7aa048b2b                    
did    fa/sp wwn        sn/32 bit seed    fa/sp
150000    50000979a8005805    CN49780XXXX    1:05
140000    50000979a8005405    CN49780YYYY    1:05
141000    50000979a8005445    CN49780YYYY    2:05
151000     50000979a8005845     CN49780XXXX    2:5 
The "rescan-scsi-bus.sh" does not resolve this issue. The "multipath -ll" command shows only paths using host11 and not using host9. 
360000970000497800022533030303544 dm-8 EMC,SYMMETRIX
size=250G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  |- 11:0:2:3 sdq  65:0   active ready running
  |- 11:0:3:3 sdt  65:48  active ready running
  |- 11:0:4:3 sdw  65:96  active ready running
  `- 11:0:5:3 sdz  65:144 active ready running
Disk array contact found HBA WWN (Node and Port Name = NULL) not logged in from list logins: 
User-generated                        Logged On 
Identifier       Type  Node Name         Port Name         FCID   In     Fabric
---------------- ----- ----------------------------------- ------ ------ ------
50000979a8005405 Fibre NULL              NULL              140000 No     No
50000979a8005445 Fibre NULL              NULL              141000 No     No

50000979a8005805 Fibre NULL              NULL              150000 No     No
50000979a8005845 Fibre NULL              NULL              151000 No     No

Cause

The fc_transport is missing HBA information.

Resolution

If you believe you have encountered this issue, contact Dell Support Center for assistance and quote this article ID. A GRAB is required for Support to investigate further.

Resolution:
Running the below command resolves the issue: 
echo “- - -” > /sys/class/scsi_host/host9/scan 

Affected Products

PowerMax, Red Hat Enterprise Linux Version 8, VMAX3 Series
Article Properties
Article Number: 000210360
Article Type: Solution
Last Modified: 27 Apr 2023
Version:  2
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