IMPORTANT ! Please run ‘vxdisk rm ’ prior to removing a LUN from a server. Please ensure you apply at least SF 5.0
Please capture the /etc/vx/diag.d/vxasldebug output prior to adding or removing any LUNs
1.) Identity the LUNs to be removed from the host:
- Use the Storage Array Management interface to identify the LUNs to be removed
# vxdisk –e –o alldgs list
# vxdisk –x LUN_SERIAL_NO –x CAB_SERIAL_NO –x UDID –p list “New to 5.0MP3”
# lscfg –vl The ‘lscfg’ command should display the LUN Serial
2.) Ensure the LUNs to be removed are not part of any diskgroup
# vxdg –g rmdisk
3.) Close and remove the LUNs at the VxVM layer
# vxdisk rm
Note: This step is essential. If you do not perform this step, Volume Manager (VxVM) will leave the device in an open state, possibly resulting in duplicate/ghost paths reported by ‘vxdisk list’ or NONAME entries. 5.0 MP3 include the NEW Data Corruption Prevention feature
4.) Close the related paths for the respective da-names for the removed LUNs
# vxdmpadm getsubpaths dmpnodename=
# vxdmpadm –f disable path=
Path being the OS native name, ie hdisk16
5.) Mask the LUNs at the Storage Layer
Using the appropriate Storage Array Management interface remove access for the required LUNs from
6.) Clean up the AIX device tree
# lsdev –Cc disk
# rmdev –dl
# cfgmgr -v
7.) Update VxVM
# vxdisk scandisks As of 5.0 MP3, both the DMP and VXVM incore
8.) Refresh the /etc/vx/disk.info file ( if the persistence option with vxddladm has been enabled )
# vxddladm assign names NEW to 5.0
Questions: Is the device tree clean? Is the ‘vxdisk list’ output correct? Is the ‘vxdisk path’ output correct? Were all the
SYMANTEC SF 5.0MP3 AIX LUN RECONFIGURATION GUIDELINES
- Prior to the provisioning of NEW luns, please ensure the AIX device tree is clean, the ‘vxdisk list’ command looks
correct and the /etc/vx/disk.info file has been refreshed (if it exists)
- Please capture the /etc/vx/diag.d/vxasldebug output prior to adding or removing any LUNs
- 5.0 MP3 introduces the ‘vxdisk –x
–p list’ enhanced command syntax to customize the standard ‘vxdisk list’ output. 5.0 MP3 also introduces the NEW ‘vxlist’ command to enable the System Administrators to work more closely with the Storage Administrators. - To perform online LUN addition:
1.) Refresh the /etc/vx/disk.info file ( if the persistence option with vxddladm has been enabled )
# vxdisk –x LUN_SERIAL_NO –x CAB_SERIAL_NO –x UDID –p list NEW to 5.0 MP3
# grep –i 0xffffffff /etc/vx/disk.info If entries are reported, then the disk.info has not been updated
# vxddladm assign names NEW to 5.0 MP3
2.) Clean up the AIX device tree and VxVM
# lsdev –Cc disk
# cfgmgr –v
# vxdisk scandisks
3.) Identity the LUNs to be presented to the host:
# vxdisk –e –o alldgs list Capture what VxVM is able to see prior to presenting the NEW
Use the Storage Array Management interface to identify the LUNs to be presented
Symantec recommend you use the EBN_AVID ( Array Volume ID ) naming scheme where possible. The AVID will be useful for
4.) Device Discovery:
# cfgmgr –v
# vxdisk scandisks Update VxVM, scan for new devices
5.) Confirm the NEW LUNs are visible to the host:
# lsdev –Cc disk
# vxdisk –e –o alldgs list Capture what VxVM is able to see prior to presenting the NEW
6.) Capture the special 5.0 MP3 related output ‘vxlist path’ and ‘vxdisk –x ….’
# vxlist path NEW to 5.0 MP3
# vxdisk –x LUN_SERIAL_NO –x CAB_SERIAL_NO –x UDID –p list NEW to 5.0 MP3
Note: Please record the date and time of when the new LUNs were provisioned, along with their corresponding serial numbers .
Applies To
AIX 5.3 running 5.0MP3
