Illegitimi non carborundum!

So, is the sata turbo button pushed?

How fast are they going (sata drives) connected to controller x:

# dmesg | grep -i sata | grep 'link up'
[    1.210000] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[    1.210001] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[    1.210002] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[    1.210003] ata6: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    1.210004] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)

Ruh-roh. Looks like ata6 is the slow one in the bunch.
That is ok if it is a sata cd rom drive... Don't want to have the cd fly out and decapitate anybody.

Stupid lvm "tricks"

I am getting older, so here is a spot for lvm, forgot how to remember stuff:

What physical (or raid) device(s) is / are the lvm associated with?

  # pvs
    PV         VG   Fmt  Attr PSize PFree  
    /dev/md2   vg0  lvm2 a-   1.77t 372.53g

So that would be vg0 on md device 2
Check cat /proc/mdstat for the physical disks in the md raid

Whats a whozit volume group of the logical volume thingie?

# vgdisplay 
  --- Volume group ---
  VG Name               vg0
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.77 TiB
  PE Size               4.00 MiB
  Total PE              462726
  Alloc PE / Size       367358 / 1.40 TiB
  Free  PE / Size       95368 / 372.53 GiB
  VG UUID               Mwa-ha-ha


# lvdisplay
  --- Logical volume ---
  LV Name                /dev/vg0/lv0
  VG Name                vg0
  LV UUID                Tra-La-La-UuId
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                1.40 TiB
  Current LE             367358
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:0

So that would be volume group vg0 with the logical volume lv0 carved out of it
And look ma, extra physical extents. Can someone say snapshot?

Tubes live on?

Late 30's tech lives on in the "modern" world. Photomultipliers
They might be obsolete, except for the fact that they are not.
I found that tidbit from the laser article I posted before this one.

Ham radio operators - back when employers let them have some fun!

Do you have some new tech that can and should be expanded upon to go where we have not been before?
How about giving space, time, and if you can materials and know-how to some folks with ambition.

Here is how it played out back in 1963: Project Red Line 50 years on
To think with all that tech, improvising with a 100W light bulb and a couple of rocks were a part of history.

It makes you think that all the maker-labs, SIG groups, and other efforts could be better focused if we just made time to have fun.
That is what I think it should be about, but then again, I have been wrong before.
I am grateful that my boss let met set up shop in the office to test out ideas with the ham group I am involved with.
From that effort, we have pushed that envelope a bit farther. 14567.org

I think the moral of this story is:
Get out there and play.
P.S. You don't have to be a ham to play, just have an inquisitive mind. There will be a spot for you somewhere.

line So I guess Cory is with the program: Go Cory! Good luck. Looks like you are up against some interesting competition Red Bull USA Creation

Thanks also to hackaday.com for pointing this out.

Does whois leave you feeling like you are doing DNS lookups for jokers?

If you do a whois and get back bunk results (try it now)

whois google.com

If you want to just get back the non "other domain registrar results", give this a try:

whois domain google.com

Sorry if I am the last one to the party on this one, but I did not find it in the man page.

Does the Internet Explorer 10 password eyeball creep you out?

- Hack the registry to turn it off:
Usual rule applies, if you don't know what this means, don't do it.
You will probably make your computer break, and then you will be sad.
passwordreveal.reg
Windows 8 users (if there are any), can change it via group policy:
gpedit.msc -> Computer Configuration -> Administrative Templates -> Windows Components -> Credential User Interface -> set the "Do not display the password reveal button" to enabled.

Linux hints

As I hate having to keep going to Google for info, I am putting things
down here so I don't forget. You will not find it to be of any use.

CD rip.

abcde -a cddb,read,encode,tag,move,playlist,clean -d /dev/sr1 -o ogg -V -x

git checkout .. no, not like all other tools, it is "clone"

git clone git://blah.blah/blah

I guess checkout was not "intuitive".

Varnish cache - something for nothing.

Have some Concrete5 sites that might need some help getting "over the hump" during busy times?
How about trying out Varnish cache?
The always smarter than me boss man put this in place on a site that was having issues during peak times and it helped the site stay alive.

Being a file backed cache, it can help keep some frequently served files cached for the big wave times.
With the default cache time of 120 seconds, it should not get in the way, and NWLinux found a way to allow bypass of login cookies within the Varnish DSL regex:
NWLinux's How To
Probably not the ultimate solution for sites that need cookies for browsing public - i.e. shopping sites, but seems ok for info sites.

Looks like Franz thinks Varnish is not a bad idea either (see comments below the article)

If you have large video files, you might want to hack up the default.vcl to pipe (assuming a recent version of Varnish is installed).

if (req.request == "GET" && req.url ~ "\.(svg|swf|ico|mp3|mp4|m4a|ogg|mov|avi|wmv|flv)$") {
        return (pipe);
     }

This will let you Varnish skip the cache and stream to Apache.

If you are having Varnish restart issues under load:
Damn, love the title of this one - See this for what Shawn Tan says
And as always, I will republish the bits that are of use in case that moves:
Under load, varnish can time out when starting up under load, and fail to talk to the back-end in time.
To fix that, add the cli_timeout switch to the daemon options.
Might want to bump it up a bit, as would it not suck to have your varnish cache fail during times of most need (i.e. highest load)?
Looks like the current default is 10 seconds.
More bits to tune here

Block IE 10 - if you have not moved on already.

Here is a reg key export (apply at your own risk) to block the auto IE 10 upgrade.
Believe it or not, some websites don't work with IE10 yet.

ie10block.reg

But if you are running Windows, you will probably not be able to download the file anyway.

BYOD (for schools).

BYOD, or as I would like to call it, bring your malware to school day.