chrishoffman at July 10th, 2014 06:40 — #1
Originally published at: http://www.howtogeek.com/192772/what-is-the-system-reserved-partition-and-can-you-delete-it/
Windows 7 and 8 create a special “System Reserved” partition when you install them on a clean disk. Windows doesn’t assign a drive letter to these partitions, so you’ll only see them when you use Disk Management or similar utility.
whs at July 10th, 2014 07:12 — #2
The commands in the tutorial that were given for the creation of an installation partition are insufficient because
a) You cannot assume that the disk on which you want to create the partition is Disk 0
b) The partition for the installation must be active
c) The partition must be formatted NTFS
I suggest the following commands:
Select disk n (where n is the number that was given for your disk in List disk)
Create partition primary
Format fs=ntfs quick
If you want to get rid of the 100MB system partition, you can copy the bootmgr to the C partition. I have written a procedure that tells you how to do that:
will_lyon at July 10th, 2014 10:23 — #3
My windows 8.1 Installation on my home PC shows the System Reserved with a drive letter assigned to it. I'll get a screenshot later
whs at July 10th, 2014 10:34 — #4
Right, I have seen that before. Apparently some OEMs assign a drive letter. That is really not a problem. If it bothers you, delete the letter with Disk Management.
will_lyon at July 10th, 2014 10:59 — #5
My system was built by me not bought though lol. I also built new PCs for my shop, all with Win 8.1 and none of them show the System Reserved partition. I didn't know you could just delete the letter assignment. Will that mess anything up?
0x64hacker117 at July 10th, 2014 11:26 — #6
I am currently using an ASUS T100TA, with 32 GB of C: drive storage, which obviously isn't much. The operating system is Windows 8.1.
I once made the mistake of deleting the System Reserved partition (which was 700MB), and while Windows 8.1 continued to work, I noticed that several functions, such as creating a system recovery partition, resetting and refreshing, no longer worked because of "missing system files".
In the end I had to take my laptop to the service centre to reinstall Windows 8.1 and thus recreate the System Reserved partition.
nsdcars5 at July 10th, 2014 11:58 — #7
Just saying, unless you have full idea what you're doing, it's worth it to let the partition be there; the pain in the power supply it's gonna be if you mess up is enough to make me not want 50 MB of space.
warren_illsley at July 10th, 2014 15:12 — #8
On my win 7 system it shows as drive H system reserved when you open "computer"
pbug56 at July 10th, 2014 21:46 — #9
Normally one leaves the partition alone. However, every once in a while something goes wrong. For instance, BACKUP started to fail saying there wasn't enough space. Turned out this partition was full - of useless log files that should not have been generated but were. I forget the cause and the fix, but there is a way, after mapping this drive, to clean out the mess and get things back to normal, after which you can once again forget about the partition.
krunalpithwa at July 11th, 2014 01:25 — #10
I have one question can we delete this system reserved partition?
rothgar at July 11th, 2014 01:34 — #11
To stop the reserved space from being created from the gui you can:
- Select create new partition (this will create reserve + install partition)
- Delete 2nd partition (leaving only the reserve)
- Highlight the reserved partition and then click expand (use the rest of the disk)
- Click next to complete installation
This is how we would do it at work because a) I hated that partition b) it would cause problems for imaging thousands of laptops/desktops depending on which imaging tool we would use.
robert_zanol at July 11th, 2014 08:28 — #12
I never, ever use the Windows installation media to prep a disk. I partition disks with an open source partition manager. Then I boot the Windows installation media and install to the NTFS partition specifically created for windows. This ensures there is no System Reserved partition. I never intend to use BitLocker so this works for me. I ask my clients if they will be using BitLocker. If they answer negatively then I do the same thing. If they want to use Bitlocker then I allow Windows installation media to create the System Reserved partition.
There really is not much mystery involved here.
robert_zanol at July 11th, 2014 08:31 — #13
If you delete the partition or mess it up you can always restore the boot manager and BCD store via command prompt from the Windows installation media repair options.
However for one not comfortable with the command prompt you are correct-it is better to leave well enough alone if you do not know what you are doing or what the consequences may be.
Also a best practice is to have an image of your disk or system partition(s) in case of disaster.
system at July 20th, 2014 06:40 — #14
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