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Operating Systems AIX cfgmgr and hdisk number allocation Post 302096560 by fosteria on Thursday 16th of November 2006 09:07:45 AM
Old 11-16-2006
Flashcopy Scripts

Hello again,

Further to my original post; I'm looking at our existing Flashcopy scripts and the related changes prior to adding our new disks. Can anybody ratify the following scripted processes (in principal) ?

Recreate Flashcopies :

(Shutdown database - quiesce i/o)

1. SMcli -n "FAStT700" -c 'recreateFlashcopy logicalDrive ["FC VOL 1-1"];
2. SMcli -n "FAStT700" -c 'create mapping logicalDrive="FC VOL 1-1" logicalUnitNumber=xx host="AIX HOST";
3.hot_add (actually cfmgr -l deviceclass)
4. chdev -l hdiskxx -a pv=clear;
5. recreatevg -y fc_vgname hdiskxx hdiskxx hdiskxx etc
6. mount /fc_filesystem

Disable Flashcopies :

1. umount /fc_filesystem
2. varyoffvg fc_vgname
3. export fc_vgname
4. rmdev -l hdiskxx (omitting -d which we run currently)
5. Smcli -n "FAStT700" -c 'delete mapping logicalDrive="FC VOL 1-1" host ="AIX HOST";
6. SMcli -n "FAStT700" -c 'disableFlashCopy logicalDrive ["FC VOL 1-1"];

Do I need to do 'chdev -l hdiskxx -a pv=yes' after the clear (step 4) in the recreate to switch the pv from defined to available again; or will the 'hot_add' do that anyway?

Also we got an error with a dirty jfs2 superblock the other night when we mounted the FC volumes. I was wondering about (a) adding a 'sync;sync;sync' call before creating the FCs to flush the buffers and (b) adding a full fsck of the FC volumes before they are mounted; I'm not sure what the policy is on this ??

Thanks in advance.
 

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cfgmgr.auth(4)						     Kernel Interfaces Manual						    cfgmgr.auth(4)

NAME
cfgmgr.auth - Configuration management server authorization database SYNOPSIS
/etc/cfgmgr.auth DESCRIPTION
The cfgmgr.auth file lists the remote systems that are authorized to modify the local system's kernel subsystem configuration. Using the sysconfig command, system administrators can maintain the kernel subsystem configuration on local and remote hosts. To secure access to the kernel subsystem configuration, the local configuration management server (cfgmgr) answers requests from remote systems only when the remote system is listed in the cfgmgr.auth file. Each entry in the file has the following form: host-name Where host-name specifies the full domain name of the remote host. You must list each remote host on a separate line and only the first 128 characters of each line are read and processed. Lines beginning with the pound sign (#) are comments. If the cfgmgr.auth file does not exist, the configuration management server assumes no remote system administrators are allowed to config- ure, reconfigure, or unconfigure any kernel subsystem on the local host. EXAMPLES
The following shows entries in the cfgmgr.auth file on a host named buster: salmon.zk3.dec.com trout.zk3.dec.com bluefish.zk3.dec.com This cfgmgr.auth file allows system administrators on the salmon, trout, and bluefish hosts to configure, reconfigure, and unconfigure sub- systems on buster. RELATED INFORMATION
Commands: cfgmgr(8), sysconfig(8), sysconfigdb(8), kloadsrv(8) Files: /etc/sysconfigtab(4) System Administration delim off cfgmgr.auth(4)
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