iPhone Windows 10 Copy Photos "Device is unreachable" Fix

Go to Settings/Photos and scroll down to "Transfer to Mac or PC", Check "Keep Originals".


It is because iPhone keeps Photos in HEIC Format, It automatically converts HEIC to JPG when you copy from USB IPhone Device to Windows. However, this function sucks and causing the iPhone disconnect from Windows. By disabling this feature, you can copy HEIC and MOV format to Windows directly without issues and increase copy speed dramatically.

You can install HEIC extension for Windows 10 here: 
https://www.microsoft.com/en-us/p/heif-image-extensions/9pmmsr1cgpwg#activetab=pivot:overviewtab

VMware VCenter 5.X SSL Certificate Erros

Cannot verify SSL certificate chain

check Web Client Server C:\ProgramData\VMware\SSL\ca_cerficiates.crt, this cert should be the SSO server root cert (not the customize root chain)


Cannot verify SSL http://servername.fqdn:XXXX/sdk

check duplicate serviceid using JXplorer and compare it with the serviceid in vpxd.cfg , removing is using unregister command.

Cisco B200 M4 Unable to change blade power state-MC

It could be a bad CPU

Enable Split Tunneling for Apps

Set-VpnConnection -Name US -SplitTunneling $True

Set-VpnConnection –Name US –IdleDisconnectSeconds 300

Add-VpnConnectionTriggerApplication -Name US –ApplicationID 4DF9E0F8.Netflix_mcm4njqhnhss8

Remove-VpnConnectionTriggerApplication

PhotoViewer in Windows 10

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Applications\photoviewer.dll]

[HKEY_CLASSES_ROOT\Applications\photoviewer.dll\shell]

[HKEY_CLASSES_ROOT\Applications\photoviewer.dll\shell\open]
"MuiVerb"="@photoviewer.dll,-3043"

[HKEY_CLASSES_ROOT\Applications\photoviewer.dll\shell\open\command]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
  00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,72,00,75,00,\
  6e,00,64,00,6c,00,6c,00,33,00,32,00,2e,00,65,00,78,00,65,00,20,00,22,00,25,\
  00,50,00,72,00,6f,00,67,00,72,00,61,00,6d,00,46,00,69,00,6c,00,65,00,73,00,\
  25,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,20,00,50,00,68,00,6f,\
  00,74,00,6f,00,20,00,56,00,69,00,65,00,77,00,65,00,72,00,5c,00,50,00,68,00,\
  6f,00,74,00,6f,00,56,00,69,00,65,00,77,00,65,00,72,00,2e,00,64,00,6c,00,6c,\
  00,22,00,2c,00,20,00,49,00,6d,00,61,00,67,00,65,00,56,00,69,00,65,00,77,00,\
  5f,00,46,00,75,00,6c,00,6c,00,73,00,63,00,72,00,65,00,65,00,6e,00,20,00,25,\
  00,31,00,00,00

[HKEY_CLASSES_ROOT\Applications\photoviewer.dll\shell\open\DropTarget]
"Clsid"="{FFE2A43C-56B9-4bf5-9A79-CC6D4285608A}"

[HKEY_CLASSES_ROOT\Applications\photoviewer.dll\shell\print]
"NeverDefault"=""

[HKEY_CLASSES_ROOT\Applications\photoviewer.dll\shell\print\command]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
  00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,72,00,75,00,\
  6e,00,64,00,6c,00,6c,00,33,00,32,00,2e,00,65,00,78,00,65,00,20,00,22,00,25,\
  00,50,00,72,00,6f,00,67,00,72,00,61,00,6d,00,46,00,69,00,6c,00,65,00,73,00,\
  25,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,20,00,50,00,68,00,6f,\
  00,74,00,6f,00,20,00,56,00,69,00,65,00,77,00,65,00,72,00,5c,00,50,00,68,00,\
  6f,00,74,00,6f,00,56,00,69,00,65,00,77,00,65,00,72,00,2e,00,64,00,6c,00,6c,\
  00,22,00,2c,00,20,00,49,00,6d,00,61,00,67,00,65,00,56,00,69,00,65,00,77,00,\
  5f,00,46,00,75,00,6c,00,6c,00,73,00,63,00,72,00,65,00,65,00,6e,00,20,00,25,\
  00,31,00,00,00

[HKEY_CLASSES_ROOT\Applications\photoviewer.dll\shell\print\DropTarget]
"Clsid"="{60fd46de-f830-4894-a628-6fa81bc0190d}"

ShadowSocks on Ubuntu LTS

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Have fun with Java Memory Tuning

First, by default JVM 1.8 setting, this program metaspace never over 20M, Old Gen never over 80M, Suvivor just around 6M - 24M.

With New Space can bump up to 1.4G, shows this Java Program create many objects for only a very short time and won't last for long. As it is a client program, GC time actually VS memory usage, we can sacrifice some GC time for much less memory as 1.4G is really large.

1st try:
-XX:MaxHeapSize=256M -XX:MaxMetaspaceSize=64M -XX:MetaspaceSize=24M -XX:NewRatio=2 -XX:CompressedClassSpaceSize=16M -XX:-UseParallelGC

Not bad, with doubled GC pause but I only use 1/5 memory

2nd try:

-XX:MaxHeapSize=128M -XX:MaxMetaspaceSize=64M -XX:MetaspaceSize=24M -XX:MaxNewSize=96M -XX:NewRatio=2 -XX:SurvivorRatio=14 -XX:CompressedClassSpaceSize=16M -XX:-UseParallelGC

Not bad, with 4 times GC pause but I only use 1/10 memory, acceptable since it is just a client program.

3rd try:

-XX:MaxHeapSize=64M -XX:MaxMetaspaceSize=64M -XX:MetaspaceSize=24M -XX:MaxNewSize=32M -XX:NewRatio=2 -XX:SurvivorRatio=3 -XX:CompressedClassSpaceSize=16M -XX:-UseParallelGC

Not good, dramatically increased to 2.3 seconds GC pause, 64M seems really a little over :)

Keep trying difference 256MB allocation.