Technical Issues

Ceph Bluestore is slow for me

When we upgraded our Ceph cluster from filestore to bluestore, our iowait went through the roof. Users were complaining about their web pages hanging all the time and all sorts of issues. This year in iowait: Between May and June we upgraded to Bluestore. The iowait seems to have slowly crept upwards after that. In September we added a bunch of SSDs and moved all our running VMs to them.

SuperMicro Server Reboots Automatically / Every 5 Minutes

Look for a watchdog feature (jumper on the motherboard or bios setting) and turn it off.

Streaming Errors with VLC on the Raspberry Pi

I’ve had tons of problems setting up my Raspberry Pi (specifically the first edition) for playing radio in sync over udp or rtp. I’ve managed to find a solution! I would get errors such as: @4000000056b8e5e40747ea1c [01ab9840] core audio output error: module not functional @4000000056b8e5e40748289c [b5d19f50] core decoder error: failed to create audio output @4000000056b8e5ed36fb571c [b4e001f8] http access: Raw-audio server found, mp3 demuxer selected @4000000056b8e5ee04fb0c1c ALSA lib pcm_hw.c:1667:(_snd_pcm_hw_open) Invalid value for card @4000000056b8e5ee0517276c [01ab9840] alsa audio output error: cannot open ALSA device "default": No such file or directory @4000000056b8e5ee05a916cc [01ab9840] core audio output error: Audio output failed @4000000056b8e5ee05cf3c6c [01ab9840] core audio output error: The audio device "default" could not be used: @4000000056b8e5ee05cf8a8c No such file or directory.

iPhone/iPad "Storage Almost Full" message appears after deleting apps and freeing space

I was having this issue on my iPad running iOS 6. The available space kept filling up after I freed space. Turns out it’s a glitch with the iCloud backup system. If you manually start an iCloud backup and let it finish, it frees up a bunch of cache. I went from having 0 bytes free to 9.3GB free after running an iCloud backup manually

Computer switches to 640x480 after rebooting (even with the latest drivers installed)

If you’re a Windows user and your computer is switching back to 640x480 after every reboot and you have your drivers installed correctly, I should have the answer for you. Open up your msconfig (start > run > msconfig) and go to the Boot tab and uncheck “Base Video”.  I had turned this on for testing purposes and didn’t realize the effect it had… doh!

Can't type/click/interact in Windows 8 native apps

I haven’t found a solution yet, but I can’t type inside Windows 8 “metro” apps when they pop up a browser and ask me to log in. For example, in the Microsoft People app, I go to log into Facebook and a white screen opens where I’m supposed to type my email address and password in. I can’t click on the fields or type anything. The only thing that I can click is the back arrow.

Computer shuts off after one second

If your PC is shutting down right after you turn it on (about 1 second), make sure the 12v (2x2 pin) cable is running to the board. This is separate from the main cable that plugs into the board. The fans spin up then spin down quickly when this is not connected and is dangerous.

Magento Downloader - No Extensions Listed

If you can’t see any packages or extensions listed in the Magento Connect Manager (Downloader), I might just have the fix for you. First thing I noticed was we didnt have pear installed (use this script to make sure your server is compatible). After I made sure the server was compatible, the extensions still weren’t listing. I found on this thread that you can enter the following: magento-core/Mage_All_Latest …into the “Paste extension key to install:” box on the Downloader.

DD-WRT TX Errors - 0% 0 OK

Wireless - Wireless Security: Set to “disable” (Wifi signal will now be visible) Wireless - Basic Settings: Set “Wireless Mode” to “Client Bridge”. Save, then Apply. (Your internet will go down, manually load your routers address or you will just wait forever.) Wireless - Wireless Security: Set to “WPA2” or whatever you had before (Wifi signal should still be visible) Note: This problem returned a few days later, might be best to update the router if you have this problem.

The network path was not found

The following Windows 7 error kept me from accessing shares on the network. 0x80070035 The network path was not foundBefore I started: I left the homegroup I was in My solution (applies to both computers on the network): Enable the Windows Firewall service (the firewall itself doesn’t have to be on.) Start the Homegroup Listener service if it was off. (Note: Homegroup Listener fails to start if the Windows Firewall service is not running and gives the following error: The HomeGroup Listener service terminated with service-specific error %%-2147023143.