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I tried to partition my 2nd hard drive (windows is on a different one) into 2 sectors, one being 130 gigs and the other 370. I ended with only 130 gigs and can't even touch the other 370. How can I fix this?

Terminology is very important in computing. A sector is the smallest unit of identifiable storage space on a drive. I believe you meant partitions.
It also helps to tell us HOW you partitioned like in did you use Disk Manager?
If you did use DM and your drive actually is 500gig go back into DM and look at the drive again. I suspect you did not format the 370gig partition.
Post back with more info if you need more troubleshooting.
Imagine the power if you knew how to internet search

xp service pack?
right click on 'my computer', select 'manage'. open the disk management snap-in. do you see any unallocated disk space on the new hard drive? if yes, right click and create a new partition.

If it is not the formatting and assigning of a drive letter as suggested above.
A few things are required to support that size drive. The version of the OS has to support them. The system board has to support it and the drive has to be set to allow it. Some drives have a jumper that can be set to dis-allows access beyond 137G. It has to do with how the ata spec was extended.
http://www.48bitlba.com/ has a tool to help you . Try the HDINFO for more help.
I read it wrong and answer it wrong too. So get off my case you goober.

Also if the hard drive isn't formatted or converted to NTFS the entire capacity of the drive will never be read. If you already formatted the drive, it was probably formatted to FAT32 by default and even with large disk support enabled, I don't think it would support a 500gb hard drive.
Internalrage

FYI: the partition size limit for FAT32 is 2 TB (terrabytes).
right now i'm looking at an external drive with a capacity of 750 GB all in one partition formatted FAT32.

That may be true. However, neither Windows 2000 nor XP support hard drives natively formatted in FAT32 larger than 32GB.
Internalrage

Let me rephrase that. Hard drives larger than 32GB cannot be FAT32 formatted in Windows 2000 Pro or XP Pro. I don't know if this limitation applies to the Home editions or not. They support being able to read the 2TB capacity when formatting was not done through Windows 2000 Pro or XP Pro. In which case I don't believe external hard drives were.
Internalrage

"However, neither Windows 2000 nor XP support hard drives natively formatted in FAT32 larger than 32GB."
of course they do.
even the installation of the above operating systems on fat32 partitions up to 2 TB is an option, if you prepare the drive prior to the installation. although i cannot see the need for an inferior file system.

Thanks for the info The_Oracle. I also agree with why anyone would need want FAT32 unless they plan on dual booting something like Windows 98 with Windows XP. NTFS provides a lot better security and faster file access. I even converted my 80GB external to NTFS. The only problem with doing that is if someone has a Windows 98/Me machine there is no way to access the drive.
Internalrage

Quoted from this MSKB 301340:
You cannot format a volume larger than 32 gigabytes (GB) in size by using the FAT32 file system. Windows XP can mount and support FAT32 volumes larger than 32 GB (subject to the other limits), but you cannot create a FAT32 volume larger than 32 GB by using the Format tool or Windows XP Setup. If you need to format a volume that is larger than 32 GB, use the NTFS file system to format it. Another option is to start from a Microsoft Windows 98 or Microsoft Windows Millennium Edition (Me) Startup disk and use the Format tool included on the disk.
i_Xp/VistaUser

zoned87
Your specs at the top of the page say N/A for the processor. This is relivent to your issue.
If your motherboard is not 48bit LBA compiant then you can't use a harddrive larger than 127GB. We have no way of even guessing with no sytem specs.
Additionally, as The Oracle has already questioned, the service pack integrated into the WinXP CD that you installed with is important.

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