Re: XP does not see all of a WD 160GB drive that was added as a slave

From: Jason Tsang (jason-onlineDEL_at_ETEmvps.org)
Date: 02/04/04 

Date: Tue, 3 Feb 2004 20:18:36 -0500

It's only going to get bigger unfortunately :( 

-- 
Jason Tsang - Microsoft MVP
Find out about the MS MVP Program -
http://mvp.support.microsoft.com/default.aspx
"John" <anonymous@discussions.microsoft.com> wrote in message
news:91f001c3eab1$d14e81c0$a101280a@phx.gbl...
> Thanks Carey!!!!!
>
> I knew that was a possibility but discounted it as such
> because I never dreamed the gap would be so large!!!!
>
> John
>
>
>
> >-----Original Message-----
> >From the Western Digital website:
> >
> >Determining drive capacity can be confusing at times
> because of the different measurement standards that are
> often used. When dealing with Windows and Mac based
> systems, you will commonly see both decimal measurements
> and binary measurements of a drive's capacity. In either
> case, a drive's capacity is measured by using the total
> number of bytes available on the drive. As long as the
> drive displays the correct number of bytes (approximate),
> you are getting the drive's full capacity.
> >
> >Decimal vs. Binary:
> >For simplicity and consistency, hard drive manufacturers
> define a megabyte as 1,000,000 bytes and a gigabyte as
> 1,000,000,000 bytes. This is a decimal (base 10)
> measurement and is the industry standard. However,
> certain system BIOSs, FDISK and Windows define a megabyte
> as 1,048,576 bytes and a gigabyte as 1,073,741,824 bytes.
> Mac systems also use these values. These are binary (base
> 2) measurements.
> >
> >  To Determine Decimal Capacity:
> >  A decimal capacity is determined by dividing the total
> number of bytes, by the number of bytes per gigabyte
> (1,000,000,000 using base 10).
> >
> >  To Determine Binary Capacity:
> >  A binary capacity is determined by dividing the total
> number of bytes, by the number of bytes per gigabyte
> (1,073,741,824 using base 2).
> >This is why different utilities will report different
> capacities for the same drive. The number of bytes is the
> same, but a different number of bytes is used to make a
> megabyte and a gigabyte. This is similar to the
> difference between 0 degrees Celsius and 32 degrees
> Fahrenheit. It is the same temperature, but will be
> reported differently depending on the scale you are using.
> >
> >
> >
> >---------------------------------------------------------
> -----------------------
> >
> >
> >
> >Various Drive Sizes and their Binary and Decimal
> Capacities
> >
> >
> >
> >      Drive Size in GB Approximate Total Bytes  Decimal
> Capacity
> >      (bytes/1,000,000,000)
> >     Approximate Binary Capacity (bytes/1,073,724,841)
> >      10 GB 10,000,000,000 10 GB 9.31 GB
> >      20 GB 20,000,000,000 20 GB 18.63 GB
> >      30 GB 30,000,000,000 30 GB 27.94 GB
> >      40 GB 40,000,000,000 40 GB 37.25 GB
> >      60 GB 60,000,000,000 60 GB 55.88 GB
> >      80 GB 80,000,000,000 80 GB 74.51 GB
> >      100 GB 100,000,000,000 100 GB 93.13 GB
> >      120 GB 120,000,000,000 120 GB 111.76 GB
> >      160 GB 160,000,000,000 160 GB 149.01 GB
> >      180 GB 180,000,000,000 180 GB 167.64 GB
> >      200 GB 200,000,000,000 200 GB 186.26 GB
> >      250 GB 250,000,000,000 250 GB 232.83 GB
> >
> >
> >-- 
> >Carey Frisch
> >Microsoft MVP
> >Windows XP - Shell/User
> >
> >Be Smart!  Protect your PC!
> >http://www.microsoft.com/security/protect/
> >
> >---------------------------------------------------------
> ----------------------------------------
> >
> >"John" <anonymous@discussions.microsoft.com> wrote in
> message:
> > news:976a01c3eaab$04c32170$a001280a@phx.gbl...
> >
> >| I am having the same problem with Windows XP Home
> edition
> >| when I attempted to add a new WD 160GB drive. I have
> read
> >| many articles and have done the following:
> >|
> >| 1) Service Pack 1 is installed
> >| 2) My Atapi.sys file is version 5.1.2600.1135
> >|
> >| My Bios sees the drive as 160 GB.
> >| My Device Manager/Disk Drives sees it as 152625MB.
> >| Disk management sees it as 149.05GB.
> >|
> >| I have initialized the disk but have not yet
> partitioned
> >| or formatted the drive.
> >|
> >| Why doesn't XP see the full drive and how do you fix
> this
> >| problem???
> >|

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