New hard drive not recognized correctly



Ozvideo
07-10-2005, 02:28 AM
I was aware that Windows used to have limitations on the size of Hard Disk
Drives for file sizes etc. but I had thought that these had now been fixed
with XP & XP PRO. The reason that I ask is because I installed a new 250GB
into a friends machine about a month ago & this went without incident.
Yesterday I just put into an external caddie a USB2 drive of 300GB into my
machine. XP Pro recognizes the drive & it will work but my computer
displays the size as only 127GB which is less than half 's true size.

Are there any other known size limitations & if so how does get around them?

--
Thanks in advance

bumtracks
07-10-2005, 02:28 AM
200gb / 127gb = 3 partitions, 2@127 and 1@ what's left over

or make three one-hundred gig partitions or six 50`GB's
or one 127, plus two@50gb, and one@73


"Ozvideo" <ozvideo@optusnet.com.au> wrote in message
news:%23mvXksFdFHA.2500@TK2MSFTNGP10.phx.gbl...
>I was aware that Windows used to have limitations on the size of Hard Disk
> Drives for file sizes etc. but I had thought that these had now been fixed
> with XP & XP PRO. The reason that I ask is because I installed a new
> 250GB
> into a friends machine about a month ago & this went without incident.
> Yesterday I just put into an external caddie a USB2 drive of 300GB into my
> machine. XP Pro recognizes the drive & it will work but my computer
> displays the size as only 127GB which is less than half 's true size.
>
> Are there any other known size limitations & if so how does get around
> them?
>
> --
> Thanks in advance
>
>
>
>
>

Ozvideo
07-10-2005, 02:28 AM
Are you saying that this size drive must be partitioned & that the maximin
size for any one partition is 127GB? Please clarify

Sharon F
07-10-2005, 02:28 AM
On Sun, 19 Jun 2005 07:07:52 +0800, Ozvideo wrote:

> I was aware that Windows used to have limitations on the size of Hard Disk
> Drives for file sizes etc. but I had thought that these had now been fixed
> with XP & XP PRO. The reason that I ask is because I installed a new 250GB
> into a friends machine about a month ago & this went without incident.
> Yesterday I just put into an external caddie a USB2 drive of 300GB into my
> machine. XP Pro recognizes the drive & it will work but my computer
> displays the size as only 127GB which is less than half 's true size.
>
> Are there any other known size limitations & if so how does get around them?

You need at least XP SP1 and support in BIOS to use drives larger than 137
GB.

Drive manufacturers define total space in powers of 10. Windows uses powers
of 2 so the drive always shows up a bit smaller. It sounds like you machine
is limited to 137GB.

How to enable 48-bit Logical Block Addressing support for ATAPI disk drives
in Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;303013
--
Sharon F
MS-MVP ~ Windows Shell/User

Ozvideo
07-10-2005, 02:29 AM
The problem seems to be the caddie. I swapped the hard drive that was in
the USB2 caddie with another smaller drive that was in the PC already. Both
My Computer & Partition Magic 8 showed the drives correct size. PM8 showed
the correct size but had the word bad displayed against the drive but
without any explanation. I then used Windows Disk management to format the
drive & it was reported as active & healthy. Just to see that things wer
100% OK I when went to get confirmation from PM8 & was amazed to see that
the drive was still being reported as bad. So at the moment I'm not 100%
ceratin that I don't have a problem. I would hate to load the drive up with
lots of data only to find that I still Have a problem. Any ideas?

Thanks in adavance


New hard drive not recognized correctly