Win 7 reads incorrect drive size

Ultimate Windows 7 ultimate 64-bit
July 29, 2010 at 10:03:37
Specs: Win7 64bit, Intel C2D/4gig
I had put a 1 TB HD into my system awhile back and it was working fine. I just 'wiped and reloaded' my system and, funny, in windows explorer and my computer, the drive reads only 693gig. Now in windows computer management/disk management, it reads 913gig. I have run a chkdsk, defrag, a disk utility from the manufacturer (WD) and unplugged and plugged it back in. No difference. What I haven't tried is downloaded all of MS updates and I wasn't able to apply a 'Sata drives' update from Dell. When I tried to install the update, there appeared a message stating that my pc didn't meet the requirements for the update. System specs are - Intel C2D E7400 cpu, 3 hd's, 4gig of pc6400 memory, ati radeon hd 512mb video. What I haven't tried is plugging it into a different sata port on the mb. All replies and opinions are greatly appreciated and respected.

Loretta


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#1
July 29, 2010 at 14:05:34
I won't get into the conversion factor, but a 1TB HDD is approx 931GB in size. If it only shows 693GB, it has something to do with the way you set it up. I don't know why you would want one huge partition anyway, esepcially if you're going to use it for the OS. Personally, I would break it up into at least 3 partitions...one for the OS, one for programs & a 3rd for storage.

http://www.partition-tool.com/


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#2
July 29, 2010 at 16:34:35
Thanks for the reply. I have never had a drive of that size so I never thought about partitioning it. I use the drive for backup anyway. I have a lot of data to move so that I can split it in two at least but that's the route I will take.

Loretta


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#3
July 29, 2010 at 22:07:52
"...in windows explorer and my computer.."

Almost no one who starts a Topic on this site mentions Windows Explorer . I prefer it to My Computer myself.

If it wasn't you who software partitioned (using the NTFS) and formatted the drive, the size of the drive letter's partition in Windows in My Computer and Windows Explorer is not necessarily the size of the hard drive's space.

In Disk Management, if the total drive size is 931GB, it should show you either that part of the drive space is un-allocated, or that the physical drive has more than one partition on it (more than one drive letter).

If it shows only one partition and there is no unallocated space on it in Disk Management, run chkdsk .

If you were accessing the drive, access something else.

All Programs - Accessories - RIGHT click on Command Prompt, choose Run as Administrator.
type: chkdsk /f (the drive letter followed by a colon) , press Enter.
E.g. if the drive letter is G
chkdsk /f G:, press Enter.
If Windows tells you something is accessing it and should you allow it to un-mount it, answer yes, press Enter.




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#4
July 31, 2010 at 05:03:01
Thanks for the replies. Problem solved. I moved the data, partitioned and reformatted and now Win 7 reads drive accurately. Long live Computing.Net!

Loretta


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#5
July 31, 2010 at 07:44:10
"In Disk Management, if the total drive size is 931GB, it should show you either that part of the drive space is un-allocated, or that the physical drive has more than one partition on it (more than one drive letter)."

What did you see in Disk Management ?

"I moved the data, partitioned and reformatted ..."

You don't have to move the data to elsewhere in Vista and Windows 7 , other than if you just want to make sure you won't lose the data if you did something wrong.

Vista and Windows 7, unlike XP and previous, have the built in ability to change the size of partitions the Vista or Windows 7 operating system made in Disk Management without you losing the data already on the partitions.

E.g.

If Disk Management shows one 693gb partition and the rest of the drive as unallocated, if you wanted to make just one partition on the drive, you simply make it larger in Disk Management.


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#6
July 31, 2010 at 08:03:14
Thanks for the reply. Gotcha. I have made it a habit when dealing with my data, I always make a backup or move it from a drive that I will be manipulating in some manner. Thanks for the tips though. I will file that and keep it for future tasks.

Loretta


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