LVM Migration from Legacy to Agile Naming Model

# vgdisplay -v -F vg01 | grep pv_name

pv_name=/dev/disk/disk5:pv_status=available:total_pe=243:free_pe=242:autoswitch=On

2. Find legacy DSFs corresponding to the persistent DSF:

# ioscan -m dsf /dev/disk/disk5

Persistent DSF Legacy DSF(s)

========================================

/dev/disk/disk5 /dev/dsk/c2t1d0

/dev/dsk/c3t1d0

3. Add legacy DSFs as alternate links to the persistent DSF:

# vgextend vg01 /dev/dsk/c2t1d0 /dev/dsk/c3t1d0

4. Remove the persistent DSF from the volume group:

# vgreduce vg01 /dev/disk/disk5

5. Disable native multi-pathing through the legacy DSFs:

scsimgr command can be run in any of the two ways, listed below:

• Disable native multi-pathing for a specific LUN in a non-persistent way:

# scsimgr set_attr -D /dev/rdisk/disk5 -a leg_mpath_enable=false

Value of attribute leg_mpath_enable set successfully

• Disable native multi-pathing globally for all LUNs in the system, in a non-persistent way:

# scsimgr set_attr -a leg_mpath_enable=false

Value of attribute leg_mpath_enable set successfully

6. Verify the resulting configuration:

The scsimgr get_attr command should show the current setting of leg_mpath_enable attribute value set to false,

for all associated persistent DSFs in the volume group.

# scsimgr get_attr -D /dev/rdisk/disk5 –a leg_mpath_enable

SCSI ATTRIBUTES FOR LUN : /dev/rdisk/disk164

name = leg_mpath_enable

current = false

default = false

saved =

Note:

• If the scsimgr command is invoked with save_attr command instead of set_attr, the corresponding change

will be persistent (behavior preserved across reboots).

• To fully understand the mass storage attributes and the consequences of changing them, refer to

scsimgr(1M) manual page.

LVM Online Disk Replacement (OLR)