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XP only detects 30.738GB out of my 37GB SATA Raptor

Posted on 2004-10-17
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Last Modified: 2010-04-03
XP-Pro (and disk manager) only detects 30.738 out of my 37GB Hard Drive, with no other free or unallocated space.

System:

37GB Raptor SATA Drive
ASUS P4C800 Deluxe with RAID
Drive in RAID channel set up as mirror.
 
Partition Magic 8.0 only sees 30GB as well.  
The onboard Promise RAID controller properly detects 37.019 GB but at the rebuild mirror screen, it only shows only a 30.738 mirror.

Everything works fine but would like to get those extra 7 GB!
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Question by:Montabahn
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by:rwweyers
ID: 12335478
That is the Overhead for a raid Mirror You will find that a 73 gig Segate on a raid card will only show as 69.8 gb This  is a normal occurance for SATA and SCSI
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by:Montabahn
ID: 12335780
Not so!  7 GB is way too large for overhead (Read my numbers again).  
Besides, I have an identical system, and Partition Magic (and XP) see the 37GB Raptor drive in total.
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by:rwweyers
ID: 12335869
hmmm
Both are set up identically to the last letter.?
Then you might have a bios issue on the card I had the same thing happen to me but I still lost some to overhead.  Check the bios on both SATA cards and reflash the one that is giving you problems
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by:Montabahn
ID: 12335909
When I set the machine up one year ago, I purposely wanted it to stay under 30GB.  I cannot remember how I did that.  Is there a way to configure, ghost, or format a hard drive so it is recognized smaller than it actually is?  There must be, because I did it.  Now the question is, how do I reverse it.  I thought PartitionMagic wouuld work, but it only recognizes the Raptor as a 30 Gigabytes Drive with no room for expansion.    
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by:rwweyers
ID: 12335993
Un mirror the drives then destroy the data on the second drive.  Then ghost the data to ne drive that has been formatted at its largest size and then place it as the primary boot off it and remirror.
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Author Comment

by:Montabahn
ID: 12336074
"Un mirror", do you mean delete the Raid array?  
How do I format the drive to its "largest size"?
You say I need to "destroy the data on the second drive."  Won't ghosting or formating destroy the data?

I think you may be on to something though.

Will ghost work on SATA?  I think it may if I plug the drive into a non-RAID SATA channel.
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by:_
ID: 12336137
Did you set a jumper on the HD to limit it to less than 32gig?
Limit it with FDISK to 30gig?
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by:Montabahn
ID: 12336301
Not with jumper.  
It has been a year since I used Fdisk and not very familiar with it.
Can you limit drive size with Fdisk?
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by:_
ID: 12336345
Yes. Just tell it how big a partition you want, and let the rest of the drive stay unallocated.
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by:Cyber-Dude
ID: 12337175
Use diskpart to analyze the drive's capacity:
1. Start => Run... => Type 'cmd' and press 'Enter.
2. Type 'diskpart' to start the disk utility of Windows XP.
3. Type 'List Disk' to view all the drives available.
4. Type 'select disk <disk number>' to select the disk you want to analyse.
5. Type 'list partition' to view partition details.
6. Type 'list volume' to verify all correct data.
7. Type 'detail disk' to view all available data on the drive.

More on the 'diskpart' utility:
http://home.earthlink.net/~rlively/MANUALS/COMMANDS/D/DISKPART.HTM

Cyber
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Author Comment

by:Montabahn
ID: 12338323
coral47:

If my drive was formatted as a 30GB and the balance is unallocated, would XP, diskpart, or Partition Magic "see" only the allocated space or both the unallocated and allocated space?


Cyber-Dude

Interesting, but diskpart only sees a primary 29GB, 1x2 Mirror Raid 1 SCSi Disk Device, 32kb offset, NTFS, healthy...
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by:rwweyers
ID: 12342815
Because this is not a software raid You may have to ghost the dive to DVD or another place and then remake the array drive theen ghost the info back to the drive.... RW
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by:rwweyers
ID: 12342827
Ghost will work on SATA as long sas you use the correct driver Like as in SCSI you need a boot  disk that can see the drives.   This is a common practice I would look into buying larger drives and setting them up as a Mirror and then ghosting to them.
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by:_
ID: 12344428
>> would XP, diskpart, or Partition Magic see <<  Xp probably won't. DP and PM should, though I don't use them, so I can't say for sure. FDISK should say if there is unallocated space on the drive.
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by:Cyber-Dude
ID: 12345768
Any chance you are using Quota Manager?

Go to the following link; It has a comprehansive drive analyser tool; I think it'll shed more lite on the drive's missing data:

Links:
Great tool for complete hard drive analysing:
http://www.webattack.com/get/hddhealth.html
And the second tool that helps complete the info;
http://www.webattack.com/get/adenixsmart.html

Good luck

Cyber
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Author Comment

by:Montabahn
ID: 12397292
Here's what I finally did.

I deleted the mirrored array (I did not delete the data) and created a new single drive, striped array.
I then used a third-party software called Casper X. P. and copyed the 30GB to my second SATA 37GB raptor.
The whole 37GB was now available, so I then created a new mirror array.

It sounds so simple, but without the software (which is very simple and elegant) and a few tech support calls with both the maker of the software and the raid controller, I would still have only 30GBs.
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