Re: AW: mklvcopy 0516-622

From: Colin Jenkins (cdj@ANTALIS.CO.UK)
Date: Fri Apr 09 2004 - 07:56:56 EDT

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Thanks Sajjad,

I have now realized what happened.

Some months ago, before rebuilding and re-importing the database I blasted /dev/zero all over the raw volumes (everything continued to work fine after recreating the database).

So the 'somebody' was me. I knew I had to create the volumes greater that the Oracle datafile size, I just forgot when I came to wipe the data.

I have now deleted and recreated the raw volumes, and then rebuilt the Oracle database, and I can see from the getlvcb command that Uwe mentioned that the LVCB has been maintained.

I will be more careful in future. I am going live with the database this weekend so thanks again Uwe and Sajjad for solving my problem.

Regards,

Colin

-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf Of Sajjad S Hashimi
Sent: 08 April 2004 5:37 PM
To: aix-l@Princeton.EDU
Subject: Re: AW: mklvcopy 0516-622

That 'somebody' as correctly pointed out by uwe is Oracle. Oracle tends to write
on the 1024 byte blocks though reserved for logical volume control block (lvcb),
hence causing the warning message to show up. If you talk to Oracle they
should be able to help you set it up such that future raw lvs are then allowed
to skip the LVCB and use the rest ( I just can't remember the details off the
top of my head)

Hope this helps a little.

Sajjad
Colin Jenkins <cdj@ANTALIS.CO.UK>

Colin Jenkins <cdj@ANTALIS.CO.UK>
Sent by: IBM AIX Discussion List <aix-l@Princeton.EDU>
04/08/2004 03:16 AM
Please respond to IBM AIX Discussion List

To: aix-l@Princeton.EDU
cc:
Subject: Re: AW: mklvcopy 0516-622

Thanks Uwe, The point is that these are raw volumes that make up the database i.e. no fs on the volume. So I guess there is no lv control block data for a volume with no fs. Does this make sense ? If have tried the getlvcb command and for a volume with a fs it returns data, but for a raw volume (no fs) it returns no data. Regards, Colin -----Original Message----- From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf Of Uwe Gründel Sent: 08 April 2004 7:08 To: aix-l@Princeton.EDU Subject: AW: mklvcopy 0516-622 Probably you down`t have any valid LVCB-Data, because you overwrote them some time ago. Compare working LVCBs with the invalid by entering: getlvcb -ATi lv_name If you get correct data in every field, everything is o.k., if not, somebody has overwritten the data during copying the data from the installed fs to raw devices. Good luck Uwe -----Ursprüngliche Nachricht----- Von: Colin Jenkins [mailto:cdj@ANTALIS.CO.UK] Gesendet: Mittwoch, 7. April 2004 18:46 An: aix-l@Princeton.EDU Betreff: mklvcopy 0516-622 On my AIX 4.3.3 ML 10 system I have an oracle 7.3 raw volume database built on an SSA RAID 5 array. I have now added 2 new D40 drawers to the system, and built RAID 0 arrays within each drawer. I have added the RAID 0 arrays into the volume group and am transferring the raw volumes from the RAID 5 array to the RAID 0 arrays (ie mirror through the LVM). When I run e.g. mklvcopy FINLar01 3 hdisk3 hdisk8 I get ... 0516-622 mklvcopy: Warning, cannot write lv control block data. Everything seems ok and allows me to synvg the volumes, but what does the warning mean ? I can't find it on my 4.3.3 doc CD and google did'nt help either. I have not been brave enough to remove the LV copy from the RAID 5 array yet.. Any ideas ? Regards, Colin Jenkins Antalis UK ************************************************************************************************** The contents of this email and any attachments are confidential. It is intended for the named recipient(s) only. If you have received this email in error please notify the system manager or the sender immediately and do not disclose the contents to any one or make copies. ** eSafe scanned this email for viruses, vandals and malicious content ** ************************************************************************************************** ************************************************************************************************** The contents of this email and any attachments are confidential. It is intended for the named recipient(s) only. If you have received this email in error please notify the system manager or the sender immediately and do not disclose the contents to any one or make copies. ** eSafe scanned this email for viruses, vandals and malicious content ** **************************************************************************************************



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