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IDS Forum

Re: Raw devices softlink to dbspaces were lost

Posted By: rroussey@comcast.net
Date: Friday, 23 October 2009, at 9:39 a.m.

In Response To: Re: Raw devices softlink to dbspaces were lost (John Miller iii)

It's been a while since I've done it, but if this is Linux 2.6 or newer, you need to use the 'udev' process and create your own config files (under /etc/udev/?? ) that rebuilds the links after any reboots. Either do a man on udev or google it.

Bob

----- Original Message -----
From: "John Miller iii" <miller3@us.ibm.com>
To: ids@iiug.org
Sent: Thursday, October 22, 2009 2:21:13 PM GMT -05:00 US/Canada Eastern
Subject: Re: Raw devices softlink to dbspaces were lost [17704]

I am not sure which version you are on, but you can do the following
and the example below show version 11.,

Assuming the device offset is 0 then you can run the following command

od -x device | head -1
0000000 0000 0000 0001 96f5 0003 1800 0130 06c0

*****

Look at the **** group of numbers, please be sure to byte swap if
you required by your processor type.

After setting all the link up and before starting the server
run oncheck -pP {chunk number} 0 | head -2 for each chunk to
make sure all is correct.

*** chunk number matches below
oncheck -pP 1 0 | head -2
addr stamp chksum nslots flag type frptr frcnt next
prev
1:0 431858 96f5 3 1800 ROOTRSV 304 1728 0
0
**** chunk number matches the command above

John F. Miller III
STSM, Support Architect
miller3@us.ibm.com
503-578-5645
IBM Informix Dynamic Server (IDS)

ids-bounces@iiug.org wrote on 10/22/2009 10:36:26 AM:

> [image removed]
>
> Re: Raw devices softlink to dbspaces were lost [17698]
>
> JACK PAPA
>
> to:
>
> ids
>
> 10/22/2009 10:37 AM
>
> Sent by:
>
> ids-bounces@iiug.org
>
> Please respond to ids
>
> Thanks all,
>
> Raw devices links to each chunks connected to dbspace is the problem...
the
> raw devices are there and also the oncheck -pr output.... which has
> the chunks
> associated to each dbspace.
>
> NOTE: It's not mirrored and i was thinking that if i got the link
restored
> from netbackup, i will just restart the db instance using onmode
-ky;oninit
> -y.
>
> Problem is the netbackup will take days to restore due to some
> process, so, im
> trying to find another solution how to restore that link between raw dev
and
> links to dbspace.
>
>
>

*******************************************************************************

> Forum Note: Use "Reply" to post a response in the discussion forum.
>

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