Extending logical volume lvol4

[boomer_2]

Hi guys,
When i m trying to extend my lvol4 m getting d followng error..heres the steps that i followed:->
root #/ >umount /backup
root #/ >lvextend -L 15000 /dev/vg00/lvol4
Warning: rounding up logical volume size to extent boundary at size "15008" MB.
lvextend: Not enough free physical extents available.
Logical volume "/dev/vg00/lvol4" could not be extended.
Failure possibly caused by contiguous allocation policy.
Failure possibly caused by strict allocation policy
root #/ >lvdisplay -v /dev/vg00/lvol4|pg
--- Logical volumes ---
LV Name /dev/vg00/lvol4
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 0
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 10016
Current LE 313
Allocated PE 313
Stripes 0
Stripe Size (Kbytes) 0
Bad block off
Allocation strict/contiguous
IO Timeout (Seconds) default

--- Distribution of logical volume ---
PV Name LE on PV PE on PV
/dev/dsk/c2t0d0s2 313 313

--- Logical extents ---
LE PV1 PE1 Status 1
00000 /dev/dsk/c2t0d0s2 00579 current
00001 /dev/dsk/c2t0d0s2 00580 current
00002 /dev/dsk/c2t0d0s2 00581 current
00003 /dev/dsk/c2t0d0s2 00582 current
00004 /dev/dsk/c2t0d0s2 00583 current
00005 /dev/dsk/c2t0d0s2 00584 current
00006 /dev/dsk/c2t0d0s2 00585 current
00007 /dev/dsk/c2t0d0s2 00586 current
00008 /dev/dsk/c2t0d0s2 00587 current
00009 /dev/dsk/c2t0d0s2 00588 current
00010 /dev/dsk/c2t0d0s2 00589 current
00011 /dev/dsk/c2t0d0s2 00590 current
00012 /dev/dsk/c2t0d0s2 00591 current
00013 /dev/dsk/c2t0d0s2 00592 current
00014 /dev/dsk/c2t0d0s2 00593 current
00015 /dev/dsk/c2t0d0s2 00594 current


--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 12
Open LV 12
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 4356
VGDA 2
PE Size (Mbytes) 32
Total PE 4346
Alloc PE 2884
Free PE 1462
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
LV Name /dev/vg00/lvol1
LV Status available/syncd
LV Size (Mbytes) 512
Current LE 16
Allocated PE 16
Used PV 1

LV Name /dev/vg00/lvol2
LV Status available/syncd
LV Size (Mbytes) 16000
Current LE 500
Allocated PE 500
Used PV 1

LV Name /dev/vg00/lvol3
LV Status available/syncd
LV Size (Mbytes) 2016
Current LE 63


Let me know what should i do??

Also my O.S disk is hard mirrored ..
i.e.
root #/ >sautil /dev/ciss2

******************************************************************************
**** ****
**** S A U T I L S u p p o r t U t i l i t y ****
**** ****
**** for the HP SmartArray RAID Controller Family ****
**** ****
**** version A.02.09 ****
**** ****
**** (C) Copyright 2003-2005 Hewlett-Packard Development Company, L.P. ****
******************************************************************************



---- DRIVER INFORMATION ------------------------------------------------------

Driver State........................ READY

---- CONTROLLER INFORMATION --------------------------------------------------

Controller Product Number........... A9890A
Controller Product Name............. HP PCI-X SmartArray 6402
Hardware Path....................... 0/1/1/0/4/0
Serial Number....................... P57820TXQT10OR
Device File......................... /dev/ciss2
Hardware Revision................... 'B'
Boot Block Revision................. 5.76
Firmware Revision (running)......... 2.58
Firmware Revision (in ROM).......... 2.58
Firmware Revision (inactive)........ 2.58
# of Logical Drives................. 1
# of Physical Disks Configured...... 2
# of Physical Disks Detected........ 2
Logical Drive Rebuild Priority...... 0 (low)
Array Capacity Expansion Priority... 0 (low)
Auto-Fail Missing Disks at Boot..... disabled
SCSI Transfer Detection Mode........ Auto Detect


---- ARRAY ACCELERATOR (CACHE) INFORMATION -----------------------------------

Array Accelerator Board Present?.... yes
Cache Configuration Status.......... cache enabled
Cache Ratio......................... 50% Read / 50% Write
Total Cache Size (MB)............... 128
Read Cache........................ 064
Write Cache....................... 064
Transfer Buffer................... 000
Battery Pack Count.................. 2
Battery Status (pack #1)............ ok
Battery Status (pack #2)............ ok


---- LOGICAL DRIVE SUMMARY ---------------------------------------------------

# RAID Size Status

0 1+0 140007 MB OK


---- SCSI DEVICE SUMMARY -----------------------------------------------------

Location Ch ID Type Capacity Status

internal 1 0 DISK 146.8 GB OK
internal 1 1 DISK 146.8 GB OK


---- SCSI BUS SUMMARY --------------------------------------------------------

External Internal
Ch LVD_Mode Connector Connector

1 YES - YES
2 YES - -


---- LOGICAL DRIVE 0 ---------------------------------------------------------

Logical Drive Device File........... c2t0d0
Fault Tolerance Mode................ RAID 1+0 (Disk Mirroring)
Logical Drive Size.................. 140007 MB
Logical Drive Status................ OK
# of Participating Physical Disks... 2

Participating Physical Disk(s)...... Ch:ID
1: 0
1: 1

Participating Spare Disk(s)......... Ch:ID
none

Stripe Size......................... 128 KB
Logical Drive Cache Status.......... cache enabled
Configuration Signature............. 0xA45C0456
Media Exchange Detected?............ no


---- SCSI DEVICE 1:0 [DISK] --------------------------------------------------

Connector Location............................... internal
Channel Number................................... 1
SCSI ID.......................................... 0
Device Type...................................... DISK
Disk Capacity.................................... 146.8 GB
Device Status.................................... OK
Device Vendor ID................................. HP 146 G
Device Product ID................................ ST3146707LC
Device Serial Number............................. 3KS48RTR00007642LBS7
Device Firmware Version.......................... HPC1
SCSI Transfer Rate (actual)...................... Ultra-320
Reserved Area (cfg/status info).................. 557.1 KB (0.6 MB)
Block Size (bytes/sector)........................ 512 bytes
M&P Data Stamped?................................ yes
Last Failure Reason.............................. none

Physical Disk Flags:
Disk present and operational................... yes
Non-disk device detected....................... no
Wide SCSI transfer enabled..................... yes
Synchronous (Fast/Ultra) transfer enabled...... yes
Narrow disk tray detected...................... no
Wide transfer failed, reverted to narrow....... no
Ultra SCSI transfer enabled.................... yes
Ultra-2 SCSI transfer enabled.................. yes

S.M.A.R.T. supported........................... yes
S.M.A.R.T. errors (in factory M&P data)........ no
S.M.A.R.T. enabled............................. yes
S.M.A.R.T. errors (in powerup M&P data)........ no
Attached to external channel................... no
Configured in a logical drive.................. yes
Configured as a spare disk..................... no
Disk write cache enabled at spin up............ no

Running in DT clocking mode.................... yes
Supports DT clocking mode only................. no
Supports DT and ST clocking modes.............. yes
Running in U320 mode........................... yes
Packetized SCSI supported...................... yes
Supports redundant controller operation........ yes
Disk write cache enabled in current page....... no
Disk write cache disabled in default page...... yes

QAS capable (U320 only)........................ yes
Currently running QAS (U320 only).............. yes



---- SCSI DEVICE 1:1 [DISK] --------------------------------------------------

Connector Location............................... internal
Channel Number................................... 1
SCSI ID.......................................... 1
Device Type...................................... DISK
Disk Capacity.................................... 146.8 GB
Device Status.................................... OK
Device Vendor ID................................. HP 146 G
Device Product ID................................ ST3146707LC
Device Serial Number............................. 3KS4A4LA00007642LUEZ
Device Firmware Version.......................... HPC1
SCSI Transfer Rate (actual)...................... Ultra-320
Reserved Area (cfg/status info).................. 557.1 KB (0.6 MB)
Block Size (bytes/sector)........................ 512 bytes
M&P Data Stamped?................................ yes
Last Failure Reason.............................. none

Physical Disk Flags:
Disk present and operational................... yes
Non-disk device detected....................... no
Wide SCSI transfer enabled..................... yes
Synchronous (Fast/Ultra) transfer enabled...... yes
Narrow disk tray detected...................... no
Wide transfer failed, reverted to narrow....... no
Ultra SCSI transfer enabled.................... yes
Ultra-2 SCSI transfer enabled.................. yes

S.M.A.R.T. supported........................... yes
S.M.A.R.T. errors (in factory M&P data)........ no
S.M.A.R.T. enabled............................. yes
S.M.A.R.T. errors (in powerup M&P data)........ no
Attached to external channel................... no
Configured in a logical drive.................. yes
Configured as a spare disk..................... no
Disk write cache enabled at spin up............ no

Running in DT clocking mode.................... yes
Supports DT clocking mode only................. no
Supports DT and ST clocking modes.............. yes
Running in U320 mode........................... yes
Packetized SCSI supported...................... yes
Supports redundant controller operation........ yes
Disk write cache enabled in current page....... no
Disk write cache disabled in default page...... yes

QAS capable (U320 only)........................ yes
Currently running QAS (U320 only).............. yes



---- DIAGRAM OF EXTERNAL CONNECTORS ON BRACKET -------------------------------

========---========
| |
| U320 <--- LOOK FOR THIS LOGO
| / \ |
| <- |
| \ / |
| |
| * * |
| * * * * |
(Ch A1)---> * * * * <--- (Ch A2)
| * * * * |
| * * |
| |
| |
| |
| |
| |
| |
| |
| |
| |
~ ~ ~ ~ ~


******************************************************************************
**** End of SAUTIL Output ****
******************************************************************************

[Torsten.]

From your lvdisplay:

...
Allocation strict/contiguous
...

To solve this, think about why it is set and consider to change. Have a look at

http://docs.hp.com/en/B2355-60105/lvchange.1M.html

lvchange -C n ...

[boomer_2]

Hi Torsten,
I have no idea as to why it is set as strict bcoz its hardwre mirrored too.........

should i go ahead wid lvchange -C n

Regards,
Boomer

[Torsten.]

Because it is mounted to "/backup" I can't see any reason to set it to contiguous.
Go ahead and change the setting.
But you have only ~4.3GB free, so you can extend up to ~14.3GB only.

[boomer_2]

hi Torsten,
Actually i have 46 gb of free space...so i can go ahead with the setting change na..should i again make it contiguous and strict....

lvchange -C n /dev/vg00/lvol4
lvchange -s n /dev/vg00/lvol4

[Torsten.]

Once it became non-contiguous (after extend) you cannot make it contiguous again, because it isn't contiguous then.

Strict does not apply, because you have only 1 disk device - the logical RAID disk.

Your free space is here:

PE Size (Mbytes) 32
Total PE 4346
Alloc PE 2884
Free PE 1462

32MB * freePE
(don't know what I calculated earlier ...)

[boomer_2]

Hi Torsten,
Once it became non-contiguous (after extend) you cannot make it contiguous again, because it isn't contiguous then.

Is it safe 4 me to go ahead with then...since i need to increase this mount point definitely.....
i.e it wont create any issues for my Hardware mirrored O.S. disks...

[Torsten. · Accepted solution]

Only /stand, / and swap must be contiguous.

contiguous means, there is no "gap" between parts of a LVOL. If you make your LVOL4 non-contiguous it will extend using space at the end of the disk - no problem for "data" lvols.

[boomer_2]

Thank u very much torsten..................i will assign u points as soon as i carry out the task....Planning to do it in next 10 min...