Lost hard disk space & hidden partitions

  Templar1961 11:58 30 Jan 2003

To free up an extra 1.7Gb of storage space I created a set of Master CDs from the backup data on my hard disk. Although the Master CDs were created succesfully the free space failed to appear in the form of a virtual hard disk assigned the letter "D" as described in the user's guide. I was therefore advised to reformat the hard drive and reinstall my software from the Master CDs. After all this my hard disk properties show a capacity of 37.2 Gb for a 40Gb hard drive. I understand that formatting accounts for some of the missing space, but is it possible that a portion of my hard drive remains hidden?

  pj123 13:52 30 Jan 2003

No. the disk manufacturer always gives capacity in whole numbers. But if you remember that 1mb is actually 1024kb and you do your sums you will see that the actual capacity is about right.

  Templar1961 14:58 30 Jan 2003

A 40 GB hard drive is approximately 40,000,000,000 bytes (40 x 1,000,000,000).
40,000,000,000 / 1,048,576 = 38,162 megabytes

40 GB

Binary MB
38,610 MB

Windows Output
37.3 GB

  Switcher 15:13 30 Jan 2003

2^10 is 1024 which is approximately 1000.

Computer people in the early days in a somewhat sloppy fashion then used the perfectly good Prefix Kilo for something which is not a Kilo.

That plus the fact that Disks are advertised using the correct mathematical terminology is what causes the confusion.

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