A hidden blank 1.5 gb partition?

I was having trouble with my laptop, so using the recovery disk I formatted it to the out-of-the-box state.
Now I went into disk management to reduce c: size and saw that there is a hidden 1.5 GB empty partition?? Watch the screenshot plz

What is it? and more importantly why is it? any ideas?
it doesn't seem possible to remove it using disk-management btw



Its a toshiba satellite a135-s2276

 

Could be a diagnostic partition, not sure if toshiba has that or not.

 

whats a disgnostic partition?

 

My laptop has a hidden partition with a diagnostic program on it so when you boot up if you hit a certain key it will run and test your hardware for problems.

 

I have 6.84 gbs of an unknown partition..... i also had some unknown partition on my old laptop when i installed vista

i do remember that in xp, i kept losing hdd space all the way down to the point where i had 30 gigs of visible files on a 80 gig hdd, but only 30 gigs free, it ended up being system restore slowly eating up space

 

By the way the hidden partition with a diagnostic program shows up as 100% free space in disk management. I also have a media direct partition that shows 100% free.

 

EISA to me hints that it's most likely a recovery partition. I'm almost sure of that.

 

I agree. EISA partitions usually contain utility/diagnostic applications or a recovery operating system.

 

OK I loaded a bootable cd with a partition program. It showed the partition as

"toshiba file system" with .133GB used space NTFS

I wonder if it would be possible to read its contents( mount with read access??)

 

oh! google

 

Funny - I just got off the phone with Dell asking them why I had 4 partitions on my 1520 - one is 2.5gb and another is 78mb. He said the first is the MediaDirect (which Toshiba doesn't have) and the second is the diagnostic. I think yours is diagnostic.