I recently encountered a volume group that was part legacy devices, part dsf agile.
root@protterdbsvr1:/root/shuffle> vgdisplay -v vgprotter
--- Volume groups ---
VG Name /dev/vgprotter
VG Write Access read/write
VG Status available
Max LV 2047
Cur LV 15
Open LV 15
Cur Snapshot LV 0
Max PV 2048
Cur PV 11
Act PV 11
Max PE per PV 65536
VGDA 22
PE Size (Mbytes) 16
Unshare unit size (Kbytes) 1024
Total PE 48004
Alloc PE 46765
Current pre-allocated PE 0
Free PE 1239
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 2.2
VG Max Size 1t
VG Max Extents 65536
Cur Snapshot Capacity 0p
Max Snapshot Capacity 1t
--- Logical volumes ---
LV Name /dev/vgprotter/sqlbin
LV Status available/syncd
LV Size (Mbytes) 20000
Current LE 1250
Allocated PE 1250
Used PV 1
LV Name /dev/vgprotter/sqladmin
LV Status available/syncd
LV Size (Mbytes) 4000
Current LE 250
Allocated PE 250
Used PV 1
LV Name /dev/vgprotter/sqlctrl1
LV Status available/syncd
LV Size (Mbytes) 512
Current LE 32
Allocated PE 32
Used PV 1
LV Name /dev/vgprotter/sqlctrl2
LV Status available/syncd
LV Size (Mbytes) 512
Current LE 32
Allocated PE 32
Used PV 1
LV Name /dev/vgprotter/sqldata1
LV Status available/syncd
LV Size (Mbytes) 550000
Current LE 34375
Allocated PE 34375
Used PV 10
LV Name /dev/vgprotter/sqldiag
LV Status available/syncd
LV Size (Mbytes) 4000
Current LE 250
Allocated PE 250
Used PV 1
LV Name /dev/vgprotter/sqlexport
LV Status available/syncd
LV Size (Mbytes) 70000
Current LE 4375
Allocated PE 4375
Used PV 5
LV Name /dev/vgprotter/sqlindex1
LV Status available/syncd
LV Size (Mbytes) 30000
Current LE 1875
Allocated PE 1875
Used PV 1
LV Name /dev/vgprotter/sqlredo1
LV Status available/syncd
LV Size (Mbytes) 10000
Current LE 625
Allocated PE 625
Used PV 1
LV Name /dev/vgprotter/sqlredo2
LV Status available/syncd
LV Size (Mbytes) 10000
Current LE 625
Allocated PE 625
Used PV 1
LV Name /dev/vgprotter/sqlsystem
LV Status available/syncd
LV Size (Mbytes) 7200
Current LE 450
Allocated PE 450
Used PV 1
LV Name /dev/vgprotter/sqltemp
LV Status available/syncd
LV Size (Mbytes) 20000
Current LE 1250
Allocated PE 1250
Used PV 1
LV Name /dev/vgprotter/sqltools
LV Status available/syncd
LV Size (Mbytes) 1008
Current LE 63
Allocated PE 63
Used PV 1
LV Name /dev/vgprotter/sqlundo
LV Status available/syncd
LV Size (Mbytes) 20000
Current LE 1250
Allocated PE 1250
Used PV 1
LV Name /dev/vgprotter/sqlusers
LV Status available/syncd
LV Size (Mbytes) 1008
Current LE 63
Allocated PE 63
Used PV 1
--- Physical volumes ---
PV Name /dev/dsk/c3t1d6
PV Name /dev/dsk/c5t1d6 Alternate Link
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/dsk/c3t1d7
PV Name /dev/dsk/c5t1d7 Alternate Link
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/dsk/c3t2d0
PV Name /dev/dsk/c5t2d0 Alternate Link
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/dsk/c3t2d1
PV Name /dev/dsk/c5t2d1 Alternate Link
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/dsk/c3t2d2
PV Name /dev/dsk/c5t2d2 Alternate Link
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk220
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk221
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk222
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk223
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk224
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk225
PV Status available
Total PE 4364
Free PE 1239
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On The issue is that two different technologies, alternate link and native multipathing are in use in the same volume group. The volume group was working but might have maintenance issues down the road. Plus I personally found it darn confusing. PV Name /dev/dsk/c3t2d2
PV Name /dev/dsk/c5t2d2 Alternate Link
The fix:
vgextend vgprotter /dev/disk/disk53
echo $?
0
vgreduce vgprotter /dev/dsk/c3t2d2
echo $?
0
vgreduce vgprotter /dev/dsk/c5t2d2
echo $?
0
We check the return code to make sure the operation was a success. Repeat for each legacy device.
No downtime though for prodcution systems I recommend working with a change request under your organizations policy.
What id looks like after we are done:
root@
protterdbsvr1:/root> vgdisplay -v vgprotter
--- Volume groups ---
VG Name /dev/vgprotter
VG Write Access read/write
VG Status available
Max LV 2047
Cur LV 15
Open LV 15
Cur Snapshot LV 0
Max PV 2048
Cur PV 11
Act PV 11
Max PE per PV 65536
VGDA 22
PE Size (Mbytes) 16
Unshare unit size (Kbytes) 1024
Total PE 48004
Alloc PE 46765
Current pre-allocated PE 0
Free PE 1239
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 2.2
VG Max Size 1t
VG Max Extents 65536
Cur Snapshot Capacity 0p
Max Snapshot Capacity 1t
--- Logical volumes ---
LV Name /dev/vgprotter/sqlbin
LV Status available/syncd
LV Size (Mbytes) 20000
Current LE 1250
Allocated PE 1250
Used PV 1
LV Name /dev/vgprotter/sqladmin
LV Status available/syncd
LV Size (Mbytes) 4000
Current LE 250
Allocated PE 250
Used PV 1
LV Name /dev/vgprotter/sqlctrl1
LV Status available/syncd
LV Size (Mbytes) 512
Current LE 32
Allocated PE 32
Used PV 1
LV Name /dev/vgprotter/sqlctrl2
LV Status available/syncd
LV Size (Mbytes) 512
Current LE 32
Allocated PE 32
Used PV 1
LV Name /dev/vgprotter/sqldata1
LV Status available/syncd
LV Size (Mbytes) 550000
Current LE 34375
Allocated PE 34375
Used PV 10
LV Name /dev/vgprotter/sqldiag
LV Status available/syncd
LV Size (Mbytes) 4000
Current LE 250
Allocated PE 250
Used PV 1
LV Name /dev/vgprotter/sqlexport
LV Status available/syncd
LV Size (Mbytes) 70000
Current LE 4375
Allocated PE 4375
Used PV 5
LV Name /dev/vgprotter/sqlindex1
LV Status available/syncd
LV Size (Mbytes) 30000
Current LE 1875
Allocated PE 1875
Used PV 1
LV Name /dev/vgprotter/sqlredo1
LV Status available/syncd
LV Size (Mbytes) 10000
Current LE 625
Allocated PE 625
Used PV 1
LV Name /dev/vgprotter/sqlredo2
LV Status available/syncd
LV Size (Mbytes) 10000
Current LE 625
Allocated PE 625
Used PV 1
LV Name /dev/vgprotter/sqlsystem
LV Status available/syncd
LV Size (Mbytes) 7200
Current LE 450
Allocated PE 450
Used PV 1
LV Name /dev/vgprotter/sqltemp
LV Status available/syncd
LV Size (Mbytes) 20000
Current LE 1250
Allocated PE 1250
Used PV 1
LV Name /dev/vgprotter/sqltools
LV Status available/syncd
LV Size (Mbytes) 1008
Current LE 63
Allocated PE 63
Used PV 1
LV Name /dev/vgprotter/sqlundo
LV Status available/syncd
LV Size (Mbytes) 20000
Current LE 1250
Allocated PE 1250
Used PV 1
LV Name /dev/vgprotter/sqlusers
LV Status available/syncd
LV Size (Mbytes) 1008
Current LE 63
Allocated PE 63
Used PV 1
--- Physical volumes ---
PV Name /dev/disk/disk220
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk221
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk222
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk223
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk224
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk225
PV Status available
Total PE 4364
Free PE 1239
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk57
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk56
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk55
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk54
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk53
PV Status available
Total PE 4364
Free PE 0
Current pre-allocated PE 0
Autoswitch On
Proactive Polling On
Tags: agile dsr, how to fix mixed agile/legacy volume group with no dowtime, hpux, legacy device, LVM, volume group