The CentOS6/RHEL6 installer does not allow to put the efi partition (/boot/efi) on a md device. And there is a pretty good reason for that:

The UEFI firmwares does only recognize FAT12/16/32 filesystems! In this early boot state, the md device is not available.
If you try it anyway (CentOS6), you will get an error, saying "You have not created a /boot/efi partition", like this:

I thought my plan is pretty straightforward. Take a screencast from my nexus4 with adb, upload it to my webserver and embed it into a html5 video tag.

But it took me about 7 hours to get the video (a perfectly valid mp4) working in Internet Exporer 11.

creating the video:

$ adb shell screenrecord /sdcard/test.mp4
$ adb pull /sdcard/test.mp4 .                                                                
140 KB/s (6001 bytes in 0.041s)
[steininr:~]↥ $ ffprobe test.mp4 
...
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x199e700] decoding for stream 0 failed
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 0
    compatible_brands: isom3gp4
    creation_time   : 2014-05-23 09:04:25
  Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
    Stream #0:0(eng): Video: h264 (Baseline ... 768x1280, DAR 3:5 ...
    Metadata:
      creation_time   : 2014-05-23 09:04:25
      handler_name    : VideoHandle

See below a easy method to manage (upload/download/delete) iso images on a VMWare datacenter datastore using curl.

upload file:

curl -k --user 'mydomain.local\myusername:supersecret' \
     --data-binary @./image.iso -X PUT \
     "https://vcenter/folder/customdir/image.iso?dcPath=MYDATACENTER&dsName=mydatastore"

Yesterday while playing around with pythons regex library re, i came across the expand function of the Match-Object class. It uses a handy template syntax supporting named backreferences to capturing groups.

Example:

$ python
>>> import re
>>> re.match("(?P<fst>.*?) (?P<snd>.*)", "a b").expand( "\g<snd> \g<fst>" )
'b a'

... "\g<fst>" expands to the first capturing group ...

... "\g<snd>" expands to the second capturing group ...