Optimistic Algorithm is aggressive enough to move to a higher rate but yet tries to conservatively capture the fluctuations of the RSSI. It starts with the highest possible rate and then decreases till the rate can be supported while periodically transmitting packets at higher rates and computing the transmission time. The optimistic rate algorithm always looks to achieve highest throughput while sacrificing noise immunity and robustness.

Rate Algorithm selection
Conservative Algorithm is less sensitive to individual packet failure as it is based on a function of number of successful and erroneous transmission/retransmission over a sampling period. It steps down to a lower rate after continuous packet failure and steps up after number of successful packets. The conservative rate algorithm provides the best case stability / robustness, but may compromise maximum throughput. It is recommended to select conservative rate algorithm when the signal strength is low due to noisy environment or link distance.

EWMA Algorithm is trying to move to a higher rate but is continuously monitoring the packet failure counters. The Exponential Weighted Moving Average (EWMA) Algorithm (also known as minstrel) is a hybrid of the Conservative and Optimistic Algorithm. It is the compromise for most of the wireless network use cases.

Check if necessary loopback device is available

# lsdev -C | grep loop

if nothing returned, run:

# mkdev -c loopback -s node -t loopback
loop0 Available

If the device is not present on system you get this error:

1320-003 loopmount: Specified loopback device is not found in ODM

Now for mount:

# loopmount -i /iso/dvd.iso -l loop0 -o "-V cdrfs -o ro" -m /mnt/dvd

And umount:

# loopumount -l loop0 -m /mnt/dvd

Attention: an image file can be associated with only one loopback device.

login: padmin
padmin's Password:
1 unsuccessful login attempt since last login.
Last unsuccessful login: Mon Jan 31 18:51:28 CST 2011 on /dev/vty0
Last login: Mon Jan 31 18:28:29 CST 2011 on /dev/vty0

$
$ mkrep -sp rootvg -size 10G
Virtual Media Repository Created
Repository created within "VMLibrary" logical volume
$ mkvopt -name 6_1_6osp.iso -dev cd0 -ro
$
$ mkvdev -vadapter vhost1 -fbo -dev vcd1
vcd0 Available
$ loadopt -vtd vcd0 -disk 6_1_6osp.iso
$ unloadopt -vtd vcd0

Download latest driver from IBM Fixcentral:
Storage Systems => Tape Systems => Tape device drivers and software => Linux

Get two two RPMs (my system is an RHEL 5 on 32bit hardware) :
lin_tape-1.61.0-1.src.rpm <== Kernel module
lin_taped-1.61.0-rhel5.i386.rpm <== Binary services

First step, rebuild the source:

# rpmbuild --rebuild lin_tape-1.61.0-1.src.rpm

Installing lin_tape-1.61.0-1.src.rpm
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.625
+ umask 022
+ cd /usr/src/redhat/BUILD
+ cd /usr/src/redhat/BUILD
+ rm -rf lin_tape-1.61.0
+ /bin/gzip -dc /usr/src/redhat/SOURCES/lin_tape-1.61.0.tgz
[cut]
Wrote: /usr/src/redhat/RPMS/i386/lin_tape-1.61.0-1.i386.rpm
Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.18792
+ umask 022
+ cd /usr/src/redhat/BUILD
+ cd lin_tape-1.61.0
+ rm -rf /var/tmp/lin_tape-1.61.0-1-root-root
+ exit 0
Executing(--clean): /bin/sh -e /var/tmp/rpm-tmp.18792
+ umask 022
+ cd /usr/src/redhat/BUILD
+ rm -rf lin_tape-1.61.0
+ exit 0

Second step, install all:

# rpm -Uhv /usr/src/redhat/RPMS/i386/lin_tape-1.61.0-1.i386.rpm
# rpm -Uhv lin_taped-1.61.0-rhel5.i386.rpm

Last step, start service and check for the probed devices:

# /etc/init.d/lin_tape start

# cat /proc/scsi/IBM*
lin_tape version: 1.61.0
lin_tape major number: 253
Attached Changer Devices:
Number model SN HBA SCSI FO Path
lin_tape version: 1.61.0
lin_tape major number: 253
Attached Tape Devices:
Number model SN HBA SCSI FO Path
0 ULTRIUM-TD2 1110274799 Adaptec 29160B Ultra160 SCSI 2:0:1:0 NA
1 ULTRIUM-TD2 1110275058 Adaptec 29160B Ultra160 SCSI 2:0:2:0 NA

# lppchk –v

lppchk: The following filesets need to be installed or corrected to bring the system to a consistent state:
9a33182fe26f1beae04e59e5cb6d3cdb 0.0.0.0 (COMMITTED)

# lslpp -L

Backup the ODM using the following command:

# tar -cvf /tmp/odm.tar ./etc/objrepos ./usr/lib/objrepos
# export ODMDIR=/usr/lib/objrepos
# odmget -q name= lpp
# odmdelete -q name= -o lpp
# odmdelete -q lpp_name= -o product
# odmdelete -q lpp_id= -o history
# odmdelete -q lpp_id= -o inventory
# export ODMDIR=/etc/objrepos
# odmdelete -q name= -o lpp
# odmdelete -q lpp_name= -o product
# odmdelete -q lpp_id= -o history
# odmdelete -q lpp_id= -o inventory
# export ODMDIR=/etc/objrepos


Check lppchk -v again to see if those entries are gone from ODM

0516-1734 extendlv: Warning, savebase failed. Please manually run ‘savebase’ before rebooting.

If you run savebase -v and you get “non-bootable LV name given” try reconstucting your /dev/ipldevice file.

Run savebase -v again and if you get the same error, try follow procedure:

# bosboot -ad /dev/hdiskX (a disk that has hd5 on it)
# bosboot -ad /dev/hdiskY (a disk that has hd5 on it)
# ipl_varyon -i

[You'll get a return on every physical disk on the system]

You will then get a return similar to this:

# savebase -v

saving to ‘/dev/hd5′
99 CuDv objects to be saved
240 CuAt objects to be saved
44 CuDep objects to be saved
51 CuVPD objects to be saved
407 CuDvDr objects to be saved
5 CuPath objects to be saved
0 CuPathAt objects to be saved
0 CuData objects to be saved
0 CuAtDef objects to be saved
Number of bytes of data to save = 49587
Compressing data
Compressed data size is = 12069
bi_start = 0×3600
bi_size = 0×1820000
bd_size = 0×1800000
ram FS start = 0x8d6ca0
ram FS size = 0xea34cf
sba_start = 0×1803600
sba_size = 0×20000
sbd_size = 0x2f29
Checking boot image size:
new save base byte cnt = 0x2f29
Wrote 12073 bytes
Successful completion

List the package that owns a file

# lslpp -w

List the files in a package

# lslpp -f

List all packages installed

# lslpp -L

File like (with +x attribute): /usr/sbin/vihosts

#!/bin/sh
sudo chattr -i /etc/hosts
sudo vim /etc/hosts
sudo chattr +i /etc/hosts

[leo@thinkleo2 ~]$ /usr/lib/ICAClient/wfcmgr -icaroot /usr/lib/ICAClient
Warning: Missing charsets in String to FontSet conversion
Warning: Missing charsets in String to FontSet conversion
Warning: Unable to load any usable fontset
Error: Aborting: no fontset found

Solution 1 force language C (my favourite for any lang problems):

[leo@thinkleo2 ~]$ export LANG=C

Solution 2 remove charset cjkuni:

smtpd_sasl_authenticated_header = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth

dovecot.conf file Dovecot related parameters:

auth default {
mechanisms = plain login


[...removed irrelevance parameters...]


socket listen {
client {
path = /var/spool/postfix/private/auth
mode = 0660
user = postfix
group = postfix
}
}
}

REQUIRE:
DVB Tools
SMCroute
PCI Card supported by Linux/DVB Tools (ex. Skystar 2)

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#!/bin/bash
####################################################################
#								   #	
# Leonardo Rizzi 						   #
# Late night 24/04/2010						   #
# Revision 1.0							   #
# Tune DVB-S pci card for Eurobird 9E shifted from 13E Hotbird     #
# Tune, set net PID, Enable multicasting ecc. ecc. blah blah buuuu #
#								   #	
####################################################################
 
#Globalvar
DTUNE="/usr/bin/dvbtune"
DNET="/usr/bin/dvbnet"
MROUTE="/usr/sbin/smcroute"
IFCONFIG="/sbin/ifconfig"
 
SERVICE="eumetsat"
 
#Set dvbcard 0-3
INT="0"
 
#Set multicast forwarding interface and ip (by default TelliCast bind on 192.168.238.238)
MINT="eth1"
MIP="192.168.238.238"
 
#Set absolute frequency in Hz
FREQ=11977000
 
#Set polarization
POL=H
 
#Set symbol rate
SYR=27500
 
#Set PID one space for value separation
PID="100 300 301 302 500 509 510 511"
 
 
#Begin start!!
 
case "$1" in
  start)
  	# Pre-Start check
 
  	test -x $DTUNE || { echo "$DTUNE not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
        test -x $DNET || { echo "$DNET not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
        test -x $MROUTE || { echo "$MROUTE not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
        test -x $IFCONFIG || { echo "$IFCONFIG not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
        test -d /dev/dvb/adapter$INT || { echo "DVB$INT device not installed or not configured properly";
        if [ "$1" = "stop" ]; then exit 0;
        else exit 5; fi; }
 
 
	# Tuning the dvb frequency 
	echo ""
	echo "Tune the satellite donwlink on interface ${INT}"
	${DTUNE} -c ${INT} -f ${FREQ} -p ${POL} -s ${SYR} -m >/dev/null 2>&1 &
 
	# Set address on local forwarding interface and bring it up
	echo ""
	echo "Set multicast forwarding interface ${MINT}"
	${IFCONFIG} ${MINT} ${MIP} multicast up
 
	# Set PID on active dvb interface
	echo ""
	echo "Set net interface for listed PID:"
	for i in ${PID}
	do
	echo "Bring up PID $i"
	${DNET} -a ${INT} -p $i>/dev/null 2>&1
	done
 
	# Set address on dvbs interfaces and bring it up
	echo ""
	echo "Set net interface up:"
	for ii in {0..7}
	do
	echo "Bring up dvb net interface $ii"
	${IFCONFIG} dvb${INT}_$ii 192.168.22$ii.238 up >/dev/null 2>&1
	done
 
	# Start multicast router
	echo ""
	echo "Enable Multicast Router"
	${MROUTE} -d
 
	#PID 100 multicast forward
	echo "Set multicast for PID 100"
	${MROUTE} -a dvb0_0 192.168.1.1 224.223.222.34 ${MINT}
	${MROUTE} -a dvb0_0 192.168.1.1 224.223.222.36 ${MINT}
	${MROUTE} -a dvb0_0 192.168.1.1 224.223.222.40 ${MINT}
	${MROUTE} -a dvb0_0 192.168.1.1 224.223.222.223 ${MINT}
 
	#PID 300 multicast forward
	echo "Set multicast for PID 300"
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.21 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.31 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.32 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.37 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.226 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.252 ${MINT}
	${MROUTE} -a dvb0_1 192.168.1.1 224.223.222.253 ${MINT}
 
	#PID 301 multicast forward
	echo "Set multicast for PID 301"
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.23 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.33 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.38 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.39 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.35 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.227 ${MINT}
	${MROUTE} -a dvb0_2 192.168.1.1 224.223.222.251 ${MINT}
 
	#PID 302 multicast forward
	echo "Set multicast for PID 302"
	${MROUTE} -a dvb0_3 192.168.1.1 224.223.222.25 ${MINT}
 
	#PID 500 multicast forward
	echo "Set multicast for PID 500"
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.1 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.22 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.28 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.27 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.29 ${MINT}
	${MROUTE} -a dvb0_4 192.168.1.1 224.223.222.30 ${MINT}
 
	#PID 509 multicast forward
	echo "Set multicast for PID 509"
	${MROUTE} -a dvb0_5 192.168.1.1 224.223.222.248 ${MINT}
	${MROUTE} -a dvb0_5 192.168.1.1 224.223.222.249 ${MINT}
	${MROUTE} -a dvb0_5 192.168.1.1 224.223.222.250 ${MINT}
 
	#PID 510 multicast forward
	echo "Set multicast for PID 510"
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.231 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.232 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.233 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.234 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.235 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.236 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.237 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.239 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.240 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.242 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.243 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.244 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.245 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.246 ${MINT}
	${MROUTE} -a dvb0_6 192.168.1.1 224.223.222.247 ${MINT}
 
	sleep 5
	;;
 
  stop)
	# Stopping the dvb card
	echo ""
	echo "Stopping Satellite Downlink"
	killall dvbtune >/dev/null 2>&1
 
	echo ""
	echo "Stopping Multicast Routing"
	# Stopping Multicast Router
	${MROUTE} -k
 
	# Disable dvbs interfaces and remove active PID
	echo ""
	echo "Shutting down DVB-S interfaces"
	for iii in {0..7}
	do
	/sbin/ifconfig dvb0_$iii down >/dev/null 2>&1
	${DNET} -d $iii >/dev/null 2>&1
	done
 
	# Remove and disable multicasting forwarding interface
	echo ""
	echo "Shutting down multicasting forwarding interface"
	${IFCONFIG} ${MINT} del ${MIP} multicast
	${IFCONFIG} ${MINT} down
 
	;;
 
  restart)
 
	$0 stop
	$0 start
	;;
 
  status)
 
  	PID1='pidof dvbtune'
  	echo ""
  	echo "Tuning subsystem running at pid" $PID1
 
  	PID2='pidof smcroute'
  	echo ""
  	echo "Mulicast router running at pid" $PID2
 
	;;
 
  multicast)
 
  	echo "Multicasting Routing table:"
  	ip mroute show  
	;;
 
  *)
	echo "Usage: $0 [start|stop|restart|status|multicast]"
	;;
esac
 
exit;s

kb315353

To resolve this issue, follow these steps:

1. Log on to your computer as an administrator.
2. Click Start, and then click Run.
3. In the Open box, type cmd, and then click OK.
4. At the command prompt, typemsiexec.exe /unregister, and then press ENTER.
5. Type msiexec /regserver, and then press ENTER.
6. Verify that the SYSTEM account has full control access permissions to the
HKEY_CLASSES_ROOT
hive in the Windows registry. In some cases, you may also have to add Administrator accounts. To do so:Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 (http://support.microsoft.com/kb/322756/ ) How to back up and restore the registry in Windows
1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Click the following registry hive:
HKEY_CLASSES_ROOT
3. On the Edit menu, click Permissions.
4. If SYSTEM is not listed in the Group or user names list, click Add, make sure that the local computer name appears in the From this location box, type system in the Enter the object names to select box, click Check Names, and then click OK.
5. Click SYSTEM in the Group or user names list, and then select the Full Control check box under Allow in the Permissions for SYSTEM box.
6. Click Apply, click OK, and then quit Registry Editor.
7. Restart the computer. If the problem is not resolved, repair Windows XP. For more information about how to repair Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
315341 (http://support.microsoft.com/kb/315341/ ) How to perform an in-place upgrade (reinstallation) of Windows XP

You can reset the key and restart that service as follows:

Reset RMC unique ID:

# /usr/sbin/rsct/install/bin/recfgct
# /usr/sbin/rsct/bin/rmcctrl -z
# /usr/sbin/rsct/bin/rmcctrl -A

Then you can check the rmc status:

# /usr/sbin/rsct/bin/rmcdomainstatus -s ctrmc

A list of the ODM Device Configuration Object Classes follows:

PdDv
Predefined Devices

PdCn
Predefined Connection

PdAt
Predefined Attribute

Config_Rules
Configuration Rules

CuDv
Customized Devices

CuDep
Customized Dependency

CuAt
Customized Attribute

CuDvDr
Customized Device Driver

CuVPD
Customized Vital Product Data

fw01-> save software from tftp 10.255.4.210 ns50ns25.5.4.0r21.0 to flash
Load software from TFTP 10.255.4.210 (file: ns50ns25.5.4.0r21.0).
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
tftp received octets = 5994268
tftp success!

TFTP Succeeded
Save to flash. It may take a few minutes ...platform = 14, cpu = 10, version = 18
update new flash image (01e97ddc,5994268)
platform = 14, cpu = 10, version = 18
offset = 20, address = 3060000, size = 5994189
date = 4062f3e0, sw_version = 4062f3e4, cksum = f7522c46
Program flash (5994268 bytes) ...
sec_size :131072 align_support 1 , mode 96028
++++++++++++++++++++++++++++++++++++++++++++++done
Done
fw01-> reset
System reset, are you sure? y/[n] y
In reset ...

If the computer is in an OpenVMS Cluster, specify a value that is unique within the cluster. Do not use zero as the value.

If the computer is running DECnet for OpenVMS, calculate the value from the DECnet address using the following formula:

SCSSYSTEMID = ((DECnet area number) * 1024) + (DECnet node number)

Example: If the DECnet address is 2.211, calculate the value as follows:

SCSSYSTEMID = (2 * 1024) + 211 = 2259

Obtain the size of the image, then identify the nearest multiple of 128 MB that will provide enough space for the image. For example, the image of CD-ROM is approximately 650/700 MB, so use 768 MB as an image size.

Make a logical volume of this size. Ensure that there is enough space on the physical volume. For example, hdisk0.

# mklv -y cdlv -s n -L /dev/cdlv rootvg 768M hdisk0

If the command fails, increase the volume size by a multiple of 128.

Use the dd command to create a pseudo-device. Ensure that the partition has enough space for the pseudo-device. In the following example command, the pseudo-device is /dev/cdlv.

# dd if=/opt/iso/cd.iso of=/dev/cdlv

Note that this command may take a long time and will create two dd processes.

Mount the device like a CD-ROM in AIX. Ensure that the mount point exists.

# mount -v cdrfs -o ro /dev/cdlv /mnt/iso