Public bug reported:
1. Attach a Ubuntu 16.04 server to a VNX array through either FC, or iSCSI;
2. LUNZ will be automatically created as below:
# sudo ./inq.LinuxAMD64
Inquiry utility, Version V8.1.1.0 (Edit Level: 2102) built with SYMAPI Version
V8.1.1.0 (Edit Level 2102)
Copyright (c) [1997-2015] EMC Corporation. All Rights Reserved.
For help type inq -h.
.......
-------------------------------------------------------------------
DEVICE :VEND :PROD :REV :SER NUM :CAP(kb)
-------------------------------------------------------------------
/dev/sda :Lenovo :720i :4.23 : : 292421632
/dev/sdb :Lenovo :720i :4.23 : : 292421632
/dev/sdc :Lenovo :720i :4.23 : : 292421632
/dev/sdd :Lenovo :720i :4.23 : : 292421632
/dev/sde :Single :Flash Reader :1.00 : : 31166976
/dev/sdf :DGC :LUNZ :0533 :00000000 : FAILED
/dev/sdg :DGC :LUNZ :0533 :00000000 : FAILED
3. Provision 2 x LUNs from VNX to the Ubuntu 16.04 server, then rescan SCSI bus
to reflect the changes. The 2 x LUNs will be recognized as below:
# sudo ./inq.LinuxAMD64
Inquiry utility, Version V8.1.1.0 (Edit Level: 2102) built with SYMAPI Version
V8.1.1.0 (Edit Level 2102)
Copyright (c) [1997-2015] EMC Corporation. All Rights Reserved.
For help type inq -h.
..........
--------------------------------------------------------------------
DEVICE :VEND :PROD :REV :SER NUM :CAP(kb)
--------------------------------------------------------------------
/dev/sda :Lenovo :720i :4.23 : : 292421632
/dev/sdb :Lenovo :720i :4.23 : : 292421632
/dev/sdc :Lenovo :720i :4.23 : : 292421632
/dev/sdd :Lenovo :720i :4.23 : : 292421632
/dev/sde :Single :Flash Reader :1.00 : : 31166976
/dev/sdf :DGC :VRAID :0533 :BB589458 : 18874368
/dev/sdg :DGC :VRAID :0533 :BB589458 : 18874368
/dev/sdh :DGC :VRAID :0533 :CA589477 : 29360128
/dev/sdi :DGC :VRAID :0533 :CA589477 : 29360128
/dev/dm-0 :DGC :VRAID :0533 :CA589477 : 29360128
4. Based on the output, it can be clearly seen that only one multipath
device(dm-0) is created. Since we provisioned 2 x LUNs, 2 x multipath
devices should be created. The one not managed by multipath-tools is the
LUN with SN BB589458, which re-uses the same native device names as the
LUNZ devices(in step 2).
5. Command "multipath -v 3 -ll" will tell the root cause that native
devices(sdf and sdg) are still recognized as LUNZ devices:
# sudo multipath -v 3 -ll
......
Mar 09 04:48:42 | sdf: udev property SCSI_IDENT_LUN_VENDOR whitelisted
Mar 09 04:48:42 | sdf: not found in pathvec
Mar 09 04:48:42 | sdf: mask = 0x25
Mar 09 04:48:42 | sdf: dev_t = 8:80
Mar 09 04:48:42 | sdf: size = 0
Mar 09 04:48:42 | sdf: vendor = DGC
Mar 09 04:48:42 | sdf: product = LUNZ
Mar 09 04:48:42 | sdf: rev = 0533
Mar 09 04:48:42 | sdf: h:b:t:l = 33:0:0:0
Mar 09 04:48:42 | sdf: tgt_node_name = iqn.1992-04.com.emc:cx.apm00153919964.a5
Mar 09 04:48:42 | (null): (DGC:LUNZ) vendor/product blacklisted
......
Mar 09 04:48:42 | sdg: udev property SCSI_IDENT_LUN_VENDOR whitelisted
Mar 09 04:48:42 | sdg: not found in pathvec
Mar 09 04:48:42 | sdg: mask = 0x25
Mar 09 04:48:42 | sdg: dev_t = 8:96
Mar 09 04:48:42 | sdg: size = 0
Mar 09 04:48:42 | sdg: vendor = DGC
Mar 09 04:48:42 | sdg: product = LUNZ
Mar 09 04:48:42 | sdg: rev = 0533
Mar 09 04:48:42 | sdg: h:b:t:l = 35:0:0:0
Mar 09 04:48:42 | sdg: tgt_node_name = iqn.1992-04.com.emc:cx.apm00153919964.b5
Mar 09 04:48:42 | (null): (DGC:LUNZ) vendor/product blacklisted
......
6. After provisioning LUNs, LUNZ should be removed, and multipath-tools
should reflected the changes.
** Affects: multipath-tools (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1671397
Title:
A VNX LUN will still be recognized as LUNZ after provisioning
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