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Should I run the syncvg after replacing a disk drive?

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ROOTVG > AIX > Administration > Should I run the syncvg after replacing a disk drive?

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	Author	Topic: Should I run the syncvg after replacing a disk drive? (Read 1537 times)
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Michael

Administrator
Hero Member

Posts: 539

Re: Should I run the syncvg after replacing a disk drive?

« Reply #4 on: January 25, 2007, 04:31:36 PM »

Actually, since AIX 5.1 or 5.2 the dumplv (even as hd6) also gets mirrored correctly during a panic. To be sure which version that is I'll need to go look at old release documents.

Before this your comments were quite valid, as AIX only tried to coredump to one of the copies, not both.


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OdO

Jr. Member

Posts: 5

Re: Should I run the syncvg after replacing a disk drive?

« Reply #3 on: January 25, 2007, 12:36:53 PM »

Hello,

it is preferable not to mirror the dumplv, and create a other dumplv00 on hdisk1, and set a secondary dump space. ( in your situation , if hdisk0 failed and for any reason the serveur crash you can't take the dump ) .

Delete copy of dumplv:
# rmlvcopy dumplv 1 hdisk1

Create dumplv00 on hdisk1:
# mklv -y dumplv00 -t sysdump rootvg 16 hdisk1

Set sysdump:
# sysdumpdev -P -p /dev/dumplv
# sysdumpdev -P -s /dev/dumplv00

Vérification:
# sysdumpdev -l

primary /dev/dumplv
secondary /dev/dumplv00
copy directory /var/adm/ras
forced copy flag TRUE
always allow dump TRUE
dump compression ON

Good root (66). ^^


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JazzyG

New Member

Posts: 3

Re: Should I run the syncvg after replacing a disk drive?

« Reply #2 on: January 23, 2007, 05:39:09 PM »

Michael,

Thanks for your timely response!

JazzyG


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Michael

Administrator
Hero Member

Posts: 539

Re: Should I run the syncvg after replacing a disk drive?

« Reply #1 on: January 23, 2007, 05:03:43 PM »

Well, the only command I am missing after you extended the rootvg back to 2 disks is:

mirrorvg rootvg hdisk1

and then you can run bosboot -ad hdisk1 to recreate the extra info needed for AIX to actually boot from hd1 (makes some changes in the physical boot block, not to be confused with hd5 (boot partition).

re: you specific question. No, it is not necessary to run syncvg before a reboot, but it is handy. AIX, when it varyon's a volumn group (any volumn group) it will (attempt) to syncvg all stale partitions before activating the volumn group.


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JazzyG

New Member

Posts: 3

Should I run the syncvg after replacing a disk drive?

« on: January 23, 2007, 01:13:30 PM »

I recently replaced a disk drive on my 6F1. We are currently run AIX 5.3 SP 5. these are the commands I entered:

# unmirrorvg rootvg
# reducevg rootvg hdisk1
# rmdev -l hdisk1 -d
Replace the disk

# cfgmgr -v
# lspv
# extendvg rootvg hdisk1
# bootlist -m normal -o
hdisk0 blv=hd5
hdisk1 blv=hd5
cd0
rmt0

# Shutdown -Fr

The system came back up sucessfully with no problems, but we I run the lsvg -l rootvg command this what I received:

rootvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
hd5 boot 1 2 2 closed/syncd N/A
hd6 paging 64 128 2 open/syncd N/A
hd8 jfslog 1 2 2 open/syncd N/A
hd4 jfs 11 22 2 open/syncd /
hd2 jfs 214 428 2 open/syncd /usr
hd9var jfs 4 8 2 open/syncd /var
hd3 jfs 6 12 2 open/syncd /tmp
hd1 jfs 3 6 2 open/syncd /home
lv00 jfs 4 8 2 closed/syncd /usr/welcome_arcad
e
lv01 jfs 2 4 2 closed/syncd /usr/welcome
0516-1147 : Warning - logical volume dumplv may be partially mirrored.
dumplv sysdump 16 10 2 open/syncd N/A
lvpd jfs 2 4 2 open/syncd /var/pd
lvpsf jfs 26 52 2 open/syncd /var/psf
lv02 jfs 40 80 2 open/syncd /usr/sys/inst.imag
es
hd10opt jfs 5 10 2 open/syncd /opt

Should I have run the "syncvg rootvg" command prior to rebooting?

Thanks in advance,

JazzyG