Tiny partition unused

P

Pavel

Some of you may have noticed a small partition on your hard drive, usually
7.8 megabytes that seem to serve no purpose. It may be located at the start
of the drive or the end of the drive. It does not seem worth the trouble to
actually use this since it is so small and most people leave it alone (that
is if you actually discover that you have it).
My understanding for the existence of this partition is that during creation
of your main partition, the partitioning software decided that in order to
keep it aligned to predefined number of tracks/sectors, this was a necessary
sacrifice.

I have created a valid drive on this partition but it just seemed useless
for anything but to store some odds and ends of files. Then I realized that
this is a great place to create an emergency disk that I could boot to
instead of using floppy drive, which is slow and you must always have one
ready with the right software on it.

In order to make this work, I needed a way to selectively boot to this
partition with out interfering with a normal boot to WindowsXP. This is
simple if you have access to a program which can switch active partition on
the fly. Once such program is PQMAGIC (there is a small utility called
PQBOOT included with PQMAGIC that can also do it with out the need for the
entire PQMAGIC program). I think that FDISK (from Windows 98) can also set
the Active disk. There are other programs that can do this. Regardless of
which program you will use, you will still have to have a bootable disk with
such program on it or.....you could use a boot manager. Most boot managers
need additional partition of about same size as this 7.8 so that would leave
me nothing for utilities. I found a great partition manager that does not
use any disk space called OSL2000. Since this OSL2000 can be invisible
during boot, you will never even notice that it's there until you need to
boot to another partition.

What do I use this partition for? Following is a list of the utilities I
have on it:

Bootable trimmed down version of Win98 that includes:
Oakcdrom.sys
Drvspace.bin
Command.com
Himem.com
Smartdrive.exe
Attrib.exe
Debug.exe
Edit.com
Edit.hlp
Fdisk.exe
Format.exe
Label.exe
Mem.exe
Mode.exe
More.exe
MSCDEX.exe
Scandisk.exe
Sys.com

Pqmagic 8 and PqDrive Image 2002 (only the basic files including Pqboot.exe)
folder
OSL2000 (only the DOS portion) folder
RAR 3.5 (DOS version) folder
NTFSPRO folder
Norton Commander folder

1) The Win98 is used to boot it's self and then it can be unused to perform
various functions such as create a bootable floppy, edit a simple text file
that could include INI and BAT files. NTFS partitions can be accessed using
program called NTFSDOS from SYSINTERNALS. It is free read only program. For
writing to NTFS, you will need NTFSPRO.

2) Pqmagic8 can be used to edit partitions. Some basic Drive Image
functionality is built in.

3) Drive Image is used for creating and restoring images of your system.
Some basic Pqmagic 8 functionality is built in. NTFS partition access is
built in.

4) OSL2000 is the partition boot program. A side benefit that is not
documented is that by using the uninstall portion of this utility, MBR is
restored.

5) RAR can be used to zip/unzip many types of compressed files.

6) Norton Commander. My favorite. It's a Disk Explorer with many features
built in to it that would normally be only accomplished with external
program in DOS such as text editor, Attribute changer, renamer...etc.
 
C

Carey Frisch [MVP]

That small partition is necessary in the event you need to
install the Recovery Console.

How to install and use the Recovery Console in Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;307654

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User
Microsoft Newsgroups

Get Windows XP Service Pack 2 with Advanced Security Technologies:
http://www.microsoft.com/athome/security/protect/windowsxp/choose.mspx

-------------------------------------------------------------------------------------------

:

| Some of you may have noticed a small partition on your hard drive, usually
| 7.8 megabytes that seem to serve no purpose. It may be located at the start
| of the drive or the end of the drive. It does not seem worth the trouble to
| actually use this since it is so small and most people leave it alone (that
| is if you actually discover that you have it).
| My understanding for the existence of this partition is that during creation
| of your main partition, the partitioning software decided that in order to
| keep it aligned to predefined number of tracks/sectors, this was a necessary
| sacrifice.
|
| I have created a valid drive on this partition but it just seemed useless
| for anything but to store some odds and ends of files. Then I realized that
| this is a great place to create an emergency disk that I could boot to
| instead of using floppy drive, which is slow and you must always have one
| ready with the right software on it.
|
| In order to make this work, I needed a way to selectively boot to this
| partition with out interfering with a normal boot to WindowsXP. This is
| simple if you have access to a program which can switch active partition on
| the fly. Once such program is PQMAGIC (there is a small utility called
| PQBOOT included with PQMAGIC that can also do it with out the need for the
| entire PQMAGIC program). I think that FDISK (from Windows 98) can also set
| the Active disk. There are other programs that can do this. Regardless of
| which program you will use, you will still have to have a bootable disk with
| such program on it or.....you could use a boot manager. Most boot managers
| need additional partition of about same size as this 7.8 so that would leave
| me nothing for utilities. I found a great partition manager that does not
| use any disk space called OSL2000. Since this OSL2000 can be invisible
| during boot, you will never even notice that it's there until you need to
| boot to another partition.
|
| What do I use this partition for? Following is a list of the utilities I
| have on it:
|
| Bootable trimmed down version of Win98 that includes:
| Oakcdrom.sys
| Drvspace.bin
| Command.com
| Himem.com
| Smartdrive.exe
| Attrib.exe
| Debug.exe
| Edit.com
| Edit.hlp
| Fdisk.exe
| Format.exe
| Label.exe
| Mem.exe
| Mode.exe
| More.exe
| MSCDEX.exe
| Scandisk.exe
| Sys.com
|
| Pqmagic 8 and PqDrive Image 2002 (only the basic files including Pqboot.exe)
| folder
| OSL2000 (only the DOS portion) folder
| RAR 3.5 (DOS version) folder
| NTFSPRO folder
| Norton Commander folder
|
| 1) The Win98 is used to boot it's self and then it can be unused to perform
| various functions such as create a bootable floppy, edit a simple text file
| that could include INI and BAT files. NTFS partitions can be accessed using
| program called NTFSDOS from SYSINTERNALS. It is free read only program. For
| writing to NTFS, you will need NTFSPRO.
|
| 2) Pqmagic8 can be used to edit partitions. Some basic Drive Image
| functionality is built in.
|
| 3) Drive Image is used for creating and restoring images of your system.
| Some basic Pqmagic 8 functionality is built in. NTFS partition access is
| built in.
|
| 4) OSL2000 is the partition boot program. A side benefit that is not
| documented is that by using the uninstall portion of this utility, MBR is
| restored.
|
| 5) RAR can be used to zip/unzip many types of compressed files.
|
| 6) Norton Commander. My favorite. It's a Disk Explorer with many features
| built in to it that would normally be only accomplished with external
| program in DOS such as text editor, Attribute changer, renamer...etc.
|
| --
| Pavel
 
P

Pavel

Carey,

I have looked at the article and nowhere there does it say that a separate
partition, more specifically, the small 7.8 megabyte partition that I was
referring to is mentioned in this article. I have installed the recovery
console as per the instruction in this article and the resulting CMDCONS was
created in the root of my C drive which contains my WindowsXP. I do not
discount the possibility of this partition being created for this purpose
but from my continuous tinkering with my systems and many other systems I
have noticed that this particular partition is not created on some drives
and is created on different drives even on the same system.
I will do some searching to see why this is so. The only reason I have
indicated my opinion as to why this partition is created was that I seem to
remember this being mentioned few times someplace but I just can not recall
where.
 
L

Lil' Dave

The 7 MB unallocated space is a requirement for the extended partition. An
offset to carry dos logical partitions within the extended partition
boundary. You won't see this unallocated space on physical hard drives with
3 primary partitions and one extended partition.
 
R

Richard Urban

Nonsense!

--
Regards,

Richard Urban

aka Crusty (-: Old B@stard :)

If you knew half as much as you think you know,
You would realize that you don't know what you thought you knew!
 
R

Richard Urban

If you had ever taken time to actually install the recovery console you
would know that it "always" installs in the root of C:


--
Regards,

Richard Urban

aka Crusty (-: Old B@stard :)

If you knew half as much as you think you know,
You would realize that you don't know what you thought you knew!
 
S

Steve N.

Pavel said:
Some of you may have noticed a small partition on your hard drive, usually
7.8 megabytes that seem to serve no purpose.

Windows 2000 and XP leave one cluster unallocated for possible use in
converting to dynamic disk.

http://support.microsoft.com/default.aspx?scid=kb;en-us;309044&sd=tech

Note this:
"You must have at least 1 megabyte (MB) of free space on any master boot
record (MBR) disk that you want to convert. This space is automatically
reserved when the partition or volume is created in Microsoft Windows
2000 or Windows XP Professional. However, it may not be available on
partitions or volumes that are created in other operating systems."

The smallest amount of disk space increments when partitioning are
clusters, the size of the cluster is determined by the disk size and
type, but typicaly I see around 8MB for 30-40 GB drives.

Steve
 
P

Pavel

Thanks Steve. I knew it was there for reason. I still find it useful for my
purpose since I nor anyone that I know uses Dynamic partitioning.
 
S

Steve N.

Pavel said:
Thanks Steve. I knew it was there for reason. I still find it useful for my
purpose since I nor anyone that I know uses Dynamic partitioning.

You're welcome. I find it kind of odd that MS is not entirely clear
about this and one has to deduce it logically, and also odd that most
MVPs here seem to be unaware of it even though it's been pointed it out
several times.

Steve
 
B

Bob I

You mean this?

"Some space at the end of the disk is reserved by Setup in case you
later want to upgrade the disk to a dynamic disk. Dynamic disk
information is saved at the end of the disk. The amount that is reserved
is a minimum of one cylinder, or 1MB, whichever is greater. One cylinder
can be up to 8MB, depending on drive geometry and translation."

Excerpt from
http://support.microsoft.com/default.aspx?scid=kb;en-us;225822
 
S

Steve N.

Bob said:
You mean this?

"Some space at the end of the disk is reserved by Setup in case you
later want to upgrade the disk to a dynamic disk. Dynamic disk
information is saved at the end of the disk. The amount that is reserved
is a minimum of one cylinder, or 1MB, whichever is greater. One cylinder
can be up to 8MB, depending on drive geometry and translation."

Excerpt from
http://support.microsoft.com/default.aspx?scid=kb;en-us;225822

Aha! Written for Win2K (which is why I never found it due to searching
KB on XP subjects) but applies to XP as well. Thank you!

Steve
 
B

Bob I

I cheated, I just searched the knowledge base for "8 megabytes", cause
that's what I've seen left over. :)
 
S

Steve N.

Bob said:
I cheated, I just searched the knowledge base for "8 megabytes", cause
that's what I've seen left over. :)

Cool. I don't consider that cheating, I consider it smart. Thanks again.

Steve
 

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