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Cannot Revert a Disk to Basic Disk

Dynamic disks support three partition types namely, Extended partitions, OEM partitions and type 0×42 for dynamic volumes. However, if MBR contains any invalid partition type, your system might run into an issue. At times, when you observe that disk is appearing as ‘Dynamic Unreadable’, it simply indicates that MBR contains invalid partition type that dynamic disks don’t support. It usually occurs when the MBR is damaged or improperly altered. Thus, to restore the lost information in this way, you require using your recent data backup. However to cope up with the situations that might occur due to data backup unavailability or damage, you should use Disk Recovery tools for recovery purpose.

You might observe following symptoms while using a Windows XP, Server 2003 or 2000 based system:

• You open Disk Management snap-in and disk appears as ‘Dynamic Unreadable’
• You try to use Revert to Basic Disk option and get an error that it will cause data loss. Next, you click yes to the option, but the process fails
• You try to use Diskpart.exe utility for converting the disk to a basic disk. You get a false message stating that it has been successfully converted into basic disk. Next, you rescan the disk, but it still appears ad ‘Dynamic Unreadable’

Cause

Basic causes responsible for this behavior to occur are:

• You are running Windows earlier than Windows 2000 and have deleted or recreated the partition using Fdisk.exe. This causes the disk to appear as damaged dynamic disk and prevent you to convert it back to basic disk
• MBR or EBR is corrupted and is forcing to appear a basic disk as damaged dynamic disk. It can occur if MBR or EBR contains a hexadecimal 0×42 value.

Solution

Follow these steps to solve the existing issue:

• Use Diskmap.exe or Dmdiag.exe utility in verbose mode to output MBR information containing system IDs and partition types in hexadecimal format.
• If this information contains invalid types, you should next use clean command of Dskprobe.exe or alternatively, Diskpart.exe utility to remove all disk partitions.
• The above step will delete all the data from the disk, so use your recent data backup to restore. In case of any backup concerns, scan your disk using Data Recovery tools. These are powerful hard disk recovery tools built to scan and safely recover the lost information.

Stellar Phoenix Windows Data Recovery is an advanced data recovery application with support to Windows 7 (currently in RC1), Vista, XP, 2003 and 2000. It is read-only tool that provides features like Disk Imaging, Disk Cloning, Drive Status etc. It supports recovery for FAT32, VFAT, NTFS and NTFS5 file systems.

About the Author

Jacob Luis is a student of Mass Communication doing research on partition recovery. He is also a file recovery Specialist.

sata converter doesn’t work properly?

I have via m/b. there are no any sata port. I want to use sata hard disk by using sata converter but it doesn’t work properly. Sata harddisk shown in BIOS but when i install windows xp it given massage that there are no any harddisk device. So pls suggest me how to use sata hdd on my m/b.

Windows XP was released before SATA became popular, and so the installer lacks support for SATA controllers.

If the SATA controller your purchased came with a floppy disk containing drivers, insert it and follow the onscreen instructions when prompted to by the installer…
“Press F6 if you need to install a third party SCSI or RAID driver”

If you don’t have a floppy drive or a disk with the drivers, you can ‘slipstream’ them onto a custom Windows installation CD using a program called nlite. This involves adding the SATA drivers to the CD. You will need access to another computer with a CD burner in order to make the CD.

http://www.nliteos.com/

DX – SATA USB 2.0 Hard Disk Enclosure for 2.5-inch HDD