EFI and Recovery HD

[rosarian007]

Can someone please explain to me exactly what the EFI 209.7MB partition is and when it was created?

This is what I get when I run the diskutil command.

bash-3.2$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *240.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_CoreStorage 239.2 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS 0emma *238.9 GB disk1

 

[slashbinslashbash]

http://en.wikipedia.org/wiki/EFI_System_partition

Apple–Intel

On Apple–Intel architecture Macintosh computers, the EFI partition is initially blank and not used for booting.[3] However, the EFI partition is used as a staging area for firmware updates;[4] specifically, it places a firmware flash utility (EFI binary) and data file (FD – "Firmware Device"[5]) in the directory EFI/APPLE/FIRMWARE which is then run when rebooting the system in "flash firmware" mode.[6]

If deleted, the system will still boot, and the boot manager will still allow users to choose whether to start a Boot Camp partition or the default Mac OS X, but firmware updates will fail.