Error Message

Example: EMC SRDF

1.] Even though the EMC SRDF-R2 (target) disks have been "SPLIT" using EMC SYMCLI command:

# symrdf -g  split

2.] The VxVM disk group (i.e. SRDFDG) operation still fails for the EMC SRDF-R2 "SPLIT" disks:

# vxdg -c -o usereplicatedev=only import SRDFDG
VxVM vxdg ERROR V-5-1-19179 Disk group SRDFDG: import failed:
Device is a hardware mirror

3.] DMP & VxVM extended attributes refreshed

# vxdisk scandisks

4.] The VxVM disk group operation now works


The new vxdg "-o usereplicatedev=only" functionality is available with the following Veritas Volume Manager hot-fixes:
 

Linux:

vm-rhel7_x86_64-HotFix-7.4.2.2902.tar.gz
vm-rhel8_x86_64-HotFix-7.4.2.2902.tar.gz
vm-sles12_x86_64-HotFix-7.4.2.2902.tar.gz    
vm-sles15_x86_64-HotFix-7.4.2.2902.tar.gz    

The enhanced functionality is not included in the latest VxVM 7.4.2.3200 public patch. Hot-fixes will be created on top of the Linux related 7.4.2.32xx branch.

Solaris:

vm-sol11_sparc-HotFix-7.4.2.2901.tar.gz    

AIX:

vm-aix-HotFix-7.4.2.2601.tar.gz    

Please contact Veritas Technical Support if you require the above VxVM hot-fixes.

[VxVM][220624-000951][NATWEST] RHEL: 7.4.2.3200 requires fixes ported on top from 7.4.2.2901(PWWN)+2902(-o usereplicatedev=only)

 JIRA STESC-6976 for Linux 7.4.1 NEW hot-fix production 

We will track the separate urgent development effort for Solaris and AIX via JIRAs

STESC-7106: [CVM][211012-001386][HSBC]Solaris IS 7.4.2: Port Improvements for CVMTypes.cf ,  /opt/VRTSvcs/bin/CVMVolDg/offline & actions/import script for CVMVolDg Shared Diskgroups

STESC-7107: [CVM][211012-001386][HSBC]AIX IS 7.4.2: Port Improvements for CVMTypes.cf , /opt/VRTSvcs/bin/CVMVolDg/offline & actions/import script for CVMVolDg Shared Diskgroups

STESC-6976

Some existing VCS replication agents (EMC SRDF, EMC MirrorView, Hitachi TrueCopy) already have additional intelligence built-in to perform selective device rescanning (vxdisk scandisks [device=]) following replication takeover

The VCS DiskGroup & CVMVolDg resources require “ClearClone = 1” to be defined for importing hardware replicated devices (vxdg -c import).
 

Veritas Cluster Server (VCS) handling of Hardware Clone & Replicated devices

DMP & VxVM Attributes

To increase the flexibility of managing future hardware technologies

The VCS CVMVolDg agent will be taking over the responsibility of running the selective device scan (vxdisk scandisks device=) operations for replication agents which don’t have this capability.

VCS CVMVolDg Example
 

group srdf_SG (
        SystemList = { node1 = 0, node2 = 1 }
        AutoFailOver = 0
        Parallel = 1
        AutoStartList = { node1, node2 }
        )

        CFSMount data_cfs (
                Critical = 0
                MountPoint = "/data"
                BlockDevice = "/dev/vx/dsk/LINUXSRDF/data"
                MountOpt = rw
                )

        CFSMount scripts_cfs (
                Critical = 0
                MountPoint = "/data/scripts"
                BlockDevice = "/dev/vx/dsk/LINUXSRDF/scripts"
                MountOpt = rw
                )

        CVMVolDg srdf_dg (
                CVMDiskGroup = LINUXSRDF
                CVMVolume = { data, scripts }
                CVMActivation = sw
                CVMDeportOnOffline = 1
                ClearClone = 1
                DGOptions = { "-t -o usereplicatedev=only" }
                ScanDisks = 1
                )

        requires group cvm online local firm
        data_cfs requires srdf_dg
        scripts_cfs requires data_cfs
        scripts_cfs requires srdf_dg

NOTE: A selective device scan is performed on all paths associated with the disk group name specified when “ScanDisks = 1”.

VCS DiskGroup agent performing selective device scans (example)
 

Figure 2 . Enhanced VCS design

Sample main.cf
 

group srdf_SG (
        SystemList = { node1 = 0, node2 = 1 }
        ClusterList = { clust1 = 0, clust2 = 1 }
        Authority = 1
        AutoStartList = { node1, node2 }
        )

        DiskGroup srdf_sg (
                DiskGroup = LINUXSRDF
                ClearClone = 1
                DGOptions = "-o usereplicatedev=only"
                ScanDisks = 1
                )

        Mount data (
                MountPoint = "/data"
                BlockDevice = "/dev/vx/dsk/LINUXSRDF/data"
                FSType = vxfs
                FsckOpt = "-n"
                )

        Mount scripts (
                MountPoint = "/data/scripts"
                BlockDevice = "/dev/vx/dsk/LINUXSRDF/scripts"
                FSType = vxfs
                FsckOpt = "-n"
                )

        SRDF srdflin (
                GrpName = LINUXSRDF
                )

        data requires srdf_dg
        scripts requires data
        scripts requires srdf_dg
        srdf_dg requires srdflin
 

VRTScavf

Please contact Veritas Technical Support if you require the latest hot-fixes for the VRTScavf package for CVMVolDg.

RHEL8, SLES12, SLES15, AIX & Solaris fixed will be available soon for VRTScavf.

• Prior to importing any hardware replicated or hardware clone device managed by Veritas Volume Manger, it is vital the VxVM disk attributes are refreshed using vxdisk scandisks [device=<paths>]