Veritas Volume Manager (VxVM) 5.0 MP4 (Linux) is not reporting EMC Symmetrix luns under the DMP "emc" enclosure when using PureDisk on SLES
Article ID: 100008172
Updated On:
Description
Error Message
# vxdisk list
DEVICE TYPE DISK GROUP STATUS
disk_0 auto - - error
disk_1 auto - - error
disk_2 auto - - error
disk_3 auto - - error
disk_4 auto - - error
disk_5 auto - - error
disk_6 auto - - error
disk_7 auto - - error
disk_8 auto - - error
disk_9 auto - - error
eva4k6k0_0 auto:sliced - - online
eva4k6k0_1 auto:sliced - - online
eva4k6k0_2 auto:sliced - - online
eva4k6k0_3 auto:sliced - - online
eva4k6k0_4 auto:sliced - - online
eva4k6k0_5 auto:sliced sdj PDDG2 online
eva4k6k0_6 auto:sliced - - online
eva4k6k0_7 auto:sliced - - online
eva4k6k0_8 auto:sliced - - online
eva4k6k0_9 auto:sliced - - online
sda auto:none - - online invalid
The EMC LUN are seen by the OS as confirmed by the third party lsscsi utility. However, they are claimed by the generic DMP "disk" enclosure.
Sample output
# lsscsi |grep SYMM
[0:0:1:0] disk EMC SYMMETRIX 5874 /dev/sdq
[0:0:1:1] disk EMC SYMMETRIX 5874 /dev/sdr
[0:0:1:2] disk EMC SYMMETRIX 5874 /dev/sds
[0:0:1:3] disk EMC SYMMETRIX 5874 /dev/sdt
[0:0:1:4] disk EMC SYMMETRIX 5874 /dev/sdu
[0:0:1:5] disk EMC SYMMETRIX 5874 /dev/sdv
[0:0:1:6] disk EMC SYMMETRIX 5874 /dev/sdw
[0:0:1:7] disk EMC SYMMETRIX 5874 /dev/sdx
[0:0:1:8] disk EMC SYMMETRIX 5874 /dev/sdy
[0:0:1:9] disk EMC SYMMETRIX 5874 /dev/sdab
[1:0:2:0] disk EMC SYMMETRIX 5874 /dev/sdap
[1:0:2:1] disk EMC SYMMETRIX 5874 /dev/sdaq
[1:0:2:2] disk EMC SYMMETRIX 5874 /dev/sdar
[1:0:2:3] disk EMC SYMMETRIX 5874 /dev/sdas
[1:0:2:4] disk EMC SYMMETRIX 5874 /dev/sdat
[1:0:2:5] disk EMC SYMMETRIX 5874 /dev/sdau
[1:0:2:6] disk EMC SYMMETRIX 5874 /dev/sdav
[1:0:2:7] disk EMC SYMMETRIX 5874 /dev/sdaw
[1:0:2:8] disk EMC SYMMETRIX 5874 /dev/sdax
[1:0:2:9] disk EMC SYMMETRIX 5874 /dev/sday
# vxdmpadm listenclosure all
ENCLR_NAME ENCLR_TYPE ENCLR_SNO STATUS ARRAY_TYPE LUN_COUNT
===================================================================================
disk Disk DISKS CONNECTED Disk 11
eva4k6k0 EVA4K6K 50001FE1500C03F0 CONNECTED ALUA 10
What is an Array Support Library?
An ASL is a small library written either by VERITAS or by an array vendor that does the work of identifying an array and telling DMP how to use the devices that are present in the array. By splitting the discovery and path fail over routines into a separate library we can add support for new arrays without changing the base VM package.
The ASL libraries are installed in /etc/vx/lib/discovery.d
There is a corresponding ASL related key file installed in /etc/vx/aslkey.d.
NOTE: Without the applicable ASL related files, the specific disks will be claimed under the generic DMP enclosure category.
In this instance, the symbolic links for the libvxemc.key file do not exist in the directories /etc/vx/aslkey.d or /etc/vx/lib/discovery.d
Cause
The EMC ASL libvxemc.so is not listed with the CLI command vxddladm listversion. As a result, the EMC Symmetrix related luns will not be claimed by the required Array Support Library (ASL).
# vxddladm listversion output
LIB_NAME ASL_VERSION Min. VXVM version
===================================================================
libvx3par.so vm-5.0-rev-1 5.0
libvxCLARiiON.so vm-5.0-rev-3 5.0
libvxhds9980.so vm-5.0-rev-1 5.0
libvxhdsalua.so vm-5.0-rev-2 5.0
libvxhdsusp.so vm-5.0-rev-2 5.0
libvxhpalua.so vm-5.0-rev-1 5.0
libvxhpmsa.so vm-5.0-rev-2 5.0
libvxibmds4k.so vm-5.0-rev-2 5.0
libvxibmds6k.so vm-5.0-rev-2 5.0
libvxibmds8k.so vm-5.0-rev-1 5.0
libvxpp.so vm-5.0-rev-1 5.0
libvxxp1281024.so vm-5.0-rev-1 5.0
libvxxp12k.so vm-5.0-rev-2 5.0
CTLR-NAME ENCLR-TYPE STATE ENCLR-NAME
=====================================================
c0 Disk ENABLED disk
c1 Disk ENABLED disk
c2 Disk ENABLED disk
c1 EVA4K6K ENABLED eva4k6k0
c0 EVA4K6K ENABLED eva4k6k0Resolution
The below steps can be performed to create symbolic links for the corresponding libvxemc.so.1 files
1.] cd /etc/vx/aslkey.d
2.] Confirm if the symbolic link is present for the required ASL key file.
3.] If the symbolic link is missing, recreate it as follows:
Sample syntax:
# ln -s /etc/vx/aslkey.d/libvxemc.key.1 libvxemc.key
4.] cd /etc/vx/lib/discovery.d
5.] If the symbolic link is missing for the ASL library, recreate it as follows:
Sample syntax
# ln -s /etc/vx/lib/discovery.d/libvxemc.so.1 libvxemc.so
6.] Following the above changes to the aslkey.d and discovery.d directories, restart the Veritas Volume Manager vxconfigd daemon for the ASL updates to be detected.
# vxconfigd -k -x syslog
Example:
Ensure the required symbolic links for the libvxemc ASL are in place:
# cd /etc/vx/aslkey.d
# ln -s /etc/vx/aslkey.d/libvxemc.key.1 libvxemc.key
# cd /etc/v/lib/discovery.d
# ln -s /etc/vx/lib/discovery.d/libvxemc.so.1 libvxemc.so
# vxdisk scandisks
# vxdisk list
DEVICE TYPE DISK GROUP STATUS
disk_0 auto - - error
disk_1 auto - - error
disk_2 auto - - error
disk_3 auto - - error
disk_4 auto - - error
disk_5 auto - - error
disk_6 auto - - error
disk_7 auto - - error
disk_8 auto - - error
disk_9 auto - - error
eva4k6k0_0 auto:sliced - - online
eva4k6k0_1 auto:sliced - - online
eva4k6k0_2 auto:sliced - - online
eva4k6k0_3 auto:sliced - - online
eva4k6k0_4 auto:sliced - - online
eva4k6k0_5 auto:sliced sdj PDDG2 online
eva4k6k0_6 auto:sliced - - online
eva4k6k0_7 auto:sliced - - online
eva4k6k0_8 auto:sliced - - online
eva4k6k0_9 auto:sliced - - online
sda auto:none - - online invalid
Following the above changes to the aslkey.d and discovery.d directories, restart the Veritas Volume Manager vxconfigd daemon for the ASL updates to be detected.
# vxconfigd -k -x syslog
The missing ASL should now be listed by the CLI command vxddladm listversion
# vxddladm listversion
LIB_NAME ASL_VERSION Min. VXVM version<<< ASL now listed following the recreation of the required symbolic links
===================================================================
libvx3par.so vm-5.0-rev-1 5.0
libvxCLARiiON.so vm-5.0-rev-3 5.0
libvxemc.so vm-5.0-rev-3 5.0
libvxhds9980.so vm-5.0-rev-1 5.0
libvxhdsalua.so vm-5.0-rev-2 5.0
libvxhdsusp.so vm-5.0-rev-2 5.0
libvxhpalua.so vm-5.0-rev-1 5.0
libvxhpmsa.so vm-5.0-rev-2 5.0
libvxibmds4k.so vm-5.0-rev-2 5.0
libvxibmds6k.so vm-5.0-rev-2 5.0
libvxibmds8k.so vm-5.0-rev-1 5.0
libvxpp.so vm-5.0-rev-1 5.0
libvxxp1281024.so vm-5.0-rev-1 5.0
libvxxp12k.so vm-5.0-rev-2 5.0
Issue/Introduction
Veritas Volume Manager (VxVM) is not reporting the EMC Symmetrix devices although detected by the O/S. The EMC LUN are displayed with an index of disk_# by the VxVM CLI command vxdisk list.
Error Message
# vxdisk listDEVICE TYPE DISK GROUP STATUS
disk_0 auto - - error
disk_1 auto - - error
disk_2 auto - - error
disk_3 auto - - error
disk_4 auto - - error
disk_5 auto - - error
disk_6 auto - - error
disk_7 auto - - error
disk_8 auto - - error
disk_9 auto - - error
eva4k6k0_0 auto:sliced - - online
eva4k6k0_1 auto:sliced - - online
eva4k6k0_2 auto:sliced - - online
eva4k6k0_3 auto:sliced - - online
eva4k6k0_4 auto:sliced - - online
eva4k6k0_5 auto:sliced sdj PDDG2 online
eva4k6k0_6 auto:sliced - - online
eva4k6k0_7 auto:sliced - - online
eva4k6k0_8 auto:sliced - - online
eva4k6k0_9 auto:sliced - - online
sda auto:none - - online invalidThe EMC LUN are seen by the OS as confirmed by the third party lsscsi utility. However, they are claimed by the generic DMP "disk" enclosure.
Sample output
# lsscsi |grep SYMM
[0:0:1:0] disk EMC SYMMETRIX 5874 /dev/sdq
[0:0:1:1] disk EMC SYMMETRIX 5874 /dev/sdr
[0:0:1:2] disk EMC SYMMETRIX 5874 /dev/sds
[0:0:1:3] disk EMC SYMMETRIX 5874 /dev/sdt
[0:0:1:4] disk EMC SYMMETRIX 5874 /dev/sdu
[0:0:1:5] disk EMC SYMMETRIX 5874 /dev/sdv
[0:0:1:6] disk EMC SYMMETRIX 5874 /dev/sdw
[0:0:1:7] disk EMC SYMMETRIX 5874 /dev/sdx
[0:0:1:8] disk EMC SYMMETRIX 5874 /dev/sdy
[0:0:1:9] disk EMC SYMMETRIX 5874 /dev/sdab
[1:0:2:0] disk EMC SYMMETRIX 5874 /dev/sdap
[1:0:2:1] disk EMC SYMMETRIX 5874 /dev/sdaq
[1:0:2:2] disk EMC SYMMETRIX 5874 /dev/sdar
[1:0:2:3] disk EMC SYMMETRIX 5874 /dev/sdas
[1:0:2:4] disk EMC SYMMETRIX 5874 /dev/sdat
[1:0:2:5] disk EMC SYMMETRIX 5874 /dev/sdau
[1:0:2:6] disk EMC SYMMETRIX 5874 /dev/sdav
[1:0:2:7] disk EMC SYMMETRIX 5874 /dev/sdaw
[1:0:2:8] disk EMC SYMMETRIX 5874 /dev/sdax
[1:0:2:9] disk EMC SYMMETRIX 5874 /dev/sday
# vxdmpadm listenclosure all
ENCLR_NAME ENCLR_TYPE ENCLR_SNO STATUS ARRAY_TYPE LUN_COUNT
===================================================================================
disk Disk DISKS CONNECTED Disk 11
eva4k6k0 EVA4K6K 50001FE1500C03F0 CONNECTED ALUA 10Cause
The EMC ASL libvxemc.so is not listed with the CLI command vxddladm listversion. As a result, the EMC Symmetrix related luns will not be claimed by the required Array Support Library (ASL).# vxddladm listversion output
LIB_NAME ASL_VERSION Min. VXVM version
===================================================================
libvx3par.so vm-5.0-rev-1 5.0
libvxCLARiiON.so vm-5.0-rev-3 5.0
libvxhds9980.so vm-5.0-rev-1 5.0
libvxhdsalua.so vm-5.0-rev-2 5.0
libvxhdsusp.so vm-5.0-rev-2 5.0
libvxhpalua.so vm-5.0-rev-1 5.0
libvxhpmsa.so vm-5.0-rev-2 5.0
libvxibmds4k.so vm-5.0-rev-2 5.0
libvxibmds6k.so vm-5.0-rev-2 5.0
libvxibmds8k.so vm-5.0-rev-1 5.0
libvxpp.so vm-5.0-rev-1 5.0
libvxxp1281024.so vm-5.0-rev-1 5.0
libvxxp12k.so vm-5.0-rev-2 5.0# vxdmpadm listctlr all
CTLR-NAME ENCLR-TYPE STATE ENCLR-NAME
=====================================================
c0 Disk ENABLED disk
c1 Disk ENABLED disk
c2 Disk ENABLED disk
c1 EVA4K6K ENABLED eva4k6k0
c0 EVA4K6K ENABLED eva4k6k0