Unallocated Partition!

  cotom 19:43 20 Feb 07

My first drive came with two main partitions: System (C) and Restore (E). I know what these are. However, there is a small partition, without a drive letter, which is at the very end of the drive, which is 'unallocated'. It has a capacity of 7.383MB (yes MB) but no free space. What is this? And why, when I try to patrition the drive further (to add Linux) does this disappear (before I commit!)

  Diodorus Siculus 20:21 20 Feb 07

... because I've got 8MB like this too and often wondered what it is :)

  cotom 20:44 20 Feb 07

"Its the MTF File table etc"

..and that is? Does that mean I shouldn't risk deleting it?

  Fruit Bat /\0/\ 20:47 20 Feb 07

The unallocated space is actually set aside by Windows when you format an NTFS drive in anticpation of you perhaps changing it to a dynamic drive in the future (this is a special windows extension that allows you to, among aother things, create dynamic volumes for RAID configurations.)

  Fruit Bat /\0/\ 20:49 20 Feb 07

If you convert the logical to a primary partition the unallocated space will be "absorbed"/disappear.

  cotom 20:50 20 Feb 07

Thanks, I think I follow and I do not have a RAID config - but if in partitioning the drive this gets lost - is there a consequence?

  Fruit Bat /\0/\ 20:52 20 Feb 07

There is a convention whereby partitions always start on cylinder boundaries and for a logical drive this is the position nearest the beginning of the drive, where that partition can start ON a new cylinder.

1 cylinder normally occupies: 63 heads of 256 sectors of 512 bytes
256 x 63 x 512 = 8,257,536 bytes

8,257,536 / 1,024 = 8,064 kB

8,064 / 1,024 = 7.875 MB

  cotom 20:53 20 Feb 07

Thanks, your next post arrived after I sent my request for clarification. I do wish a Primary partition so if I follow I can go ahead with this and the 7.4 partition doesn't matter.

  Fruit Bat /\0/\ 20:54 20 Feb 07

As stated at Tue, [email protected]:47

Quite safe to delete or absord if not using RAID etc.

Think this info is somewhere in Partition Magic Help pages.

  cotom 20:56 20 Feb 07

Cheers, thats helpful!

  Diodorus Siculus 21:08 20 Feb 07

Fruit Bat - thanks from me also :)

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