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How do you reformat in command prompt... already have a partition

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You cannot format windows partition from command prompt. It's a security measure for some viruses.
You can only format partitions which does not contain current operating system
The only way to format windows partition is from windows boot cd

Posted on Jul 29, 2009

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Posted on Jul 29, 2009

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Acer eRecovery management Restore system to factor default but I don't know the password


Locate and Unhide Hidden Rescue Partition
  • 1 Access the Diskpart command prompt. Acer stores custom eRecovery passwords on your computer in PQService, a hidden rescue partition. Locating this partition requires accessing the Diskpart utility from the command prompt. Diskpart allows you to run a scan on your hard drive and bring up hidden partitions. To access Diskpart, go to Start and type "cmd" in the search bar to bring up the black command prompt box, and then type "diskpart" at the prompt to switch to a Diskpart prompt. Depending on your computer, a new command prompt may open with the Diskpart prompt.
  • 2 Scan your computer configuration. At the Diskpart prompt, type "rescan" to run a system configuration check. When the scan finishes, you will receive a message informing you the scan is complete. At the command prompt, type "list disks" to bring up available disks and then type "select disk 0."
  • 3 Locate the hidden partition. At the command prompt, type "list partition" to view a list of partitions on your disk. Locate the partition with no name and a size of approximately 10GB. At the command prompt, type "select partition (number)."
  • 4 Determine the partition type and unhide the partition. The hidden PQService partition will be either a type 27 or a type 12 partition. If the partition is type 27, unhide it by typing "set id=07 override," and if a type 12, then unhide it by typing "set id=0B" at the command prompt.
  • 5 View the PQService partition. Return to the disk containing PQService by typing "select disk 0" at the command prompt, and then type "list volume" to view the contents of the disk. PQService will be visible in the list, preceded by a number. Type "select volume (number)" and then assign PQService a new drive letter so you will be able to open and view it from your computer interface window. At the command prompt, type "assign letter=f."
Reset eRecovery Password
  • 1 Open PQService. Navigate to the drive containing PQService. Find the file "aimdrs.dat." Right-click on the file and select "Open with" and then "Textpad," "Notepad" or another text editor you prefer.
  • 2 Open the file and find the password. Open the file with your text editor and locate the eRecovery password. Look for a line that reads, "Password=password name," "Hint=the password hint." Write down the password and close the file.
  • 3 Open eRecovery using the recovered password and follow the instructions to create a new password.


Read more

May 23, 2015 | Acer Computers & Internet

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Creating a bootable flash drive


<p><b>Resolution:</b><br /> <p>The USB Flash Drive must be configured with an active primary MS-DOS partition. It must also contain the boot files. Follow the steps below to create a bootable USB Flash Drive. <br /> <p><b>Requirements:</b><br /> <ul> <li> Motherboard with BIOS that supports USB boot. <li> USB Flash Drive that may be erased. <li> Bootable floppy disk or CD with Fdisk and Format commands. </li></ul> <p><b>Directions:</b><br /> <ol> <li> Plug in the USB Flash Drive. <li> Make the USB drive the only bootable hard drive. <b>Method 1:</b><br />If available, change the BIOS settings for the hard drive sequence, making sure the USB device is at the top of the list above all other hard drives. Not all BIOS Setup Utilities have this option. <b> Method 2:</b><br /> Disable all hard drives in the BIOS. In some BIOS Setup Utilities you can disable the individual hard drives, while in others you will need to disable the controller. <b> Method 3:</b><br /> Unplug all hard drive cables inside the case. If the cables are unplugged the computer cannot detect and boot to the hard drive. <li> Insert the bootable floppy disk or CD into the appropriate drive. <li> Restart the computer to the bootable floppy disk or CD. <li> At the command prompt, type: FDisk. <li> Delete and create a new active primary DOS partition. <li> Use FDisk to delete all partitions from the USB Flash Drive. <ul> <li> In FDisk, press the 3 key to Delete partition or Logical DOS Drive. <li> If there is just one partition on the drive, choose 1 to delete the primary DOS partition. If there are several partitions, the extended and logical partitions must be deleted before the primary partition. <li> After choosing option 1, the screen appears with partition information and a prompt for the partition to delete. Choose which primary DOS partition to delete, and then press ENTER. <li> A prompt appears to enter the volume label of the hard drive. Enter the label exactly as it appears on the top of the screen in the partition information. If the volume label contains gibberish or lowercase letters, the partition will have to be deleted as a non-DOS partition. Try using the option to delete a non-DOS partition in FDISK. After entering the volume label, press ENTER. <li> You are prompted if it should delete the partition. Press Y for Yes, and then press ENTER. <li> The screen changes to show only the total disk space and a line near the bottom that prompts that the primary DOS partition has been deleted. Press the ESC key to return to the main menu. </li></ul> <li> Use FDisk to create a primary partition on the USB Flash Drive. The drive letter will be C:, since all other hard drives were disabled in step 2. <ul> <li> In FDisk, press 1 to Create DOS partition or Logical DOS drive. <li> Press 1 to Create a Primary DOS Partition. <li> The next screen prompts if the maximum hard disk size should be made into one partition. Press the Y key, and then press ENTER. <li> The next screen prompts that the computer will now reboot. Press ENTER to continue. </li></ul> <li> Exit FDisk and restart the computer. <li> Start the computer from the bootable floppy disk or CD with the USB Flash Drive still connected. <li> At the command prompt, run Format by typing the following command: Format c: /s. Press ENTER. <li> At the command prompt, run FDisk by typing following command: Fdisk /mbr. Press ENTER. <li> Restart the computer without the bootable floppy disk or CD, and attempt to boot to the USB Flash Drive. If it works, it should go to a C:\&gt; command prompt. <li> Change the settings made in step 2 back so that the computer operates normally again. </li></ol>

on Mar 14, 2011 | Computers & Internet

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How to Reset an Password for Acer eRecovery


Acer eRecovery is a vendor-specific method you can use to restore your computer to its original factory settings, or to custom settings you create and store on your hard drive or other removable media. eRecovery also contains a back-up utility you can use to back up data to your hard drive or other removable media. Access to eRecovery requires you to use the default "000000"password or one you select. While it is important to store a custom password in a safe location, if you lose or forget it, there are steps you can take to reset your Acer eRecovery password.
Access the Diskpart command prompt. Acer stores custom eRecovery passwords on your computer in PQService, a hidden rescue partition. Locating this partition requires accessing the Diskpart utility from the command prompt. Diskpart allows you to run a scan on your hard drive and bring up hidden partitions.

02d2ca3.pngstep 1. To access Diskpart, go to "Start" and type "cmd" in the Search bar to bring up the black command prompt box, and then type "diskpart" at the prompt to switch to a Diskpart prompt. Depending on your computer, a new command prompt may open with the Diskpart prompt.
Step 2. Scan your computer configuration. At the Diskpart prompt, type "rescan" to run a system configuration check. When the scan finishes, you will receive a message informing you the scan is complete. At the command prompt, type "list disks" to bring up available disks and then type "select disk 0."
Step 3. Locate the hidden partition. At the command prompt, type "list partition" to view a list of partitions on your disk. Locate the partition with no name and a size of approximately 10 GB. At the command prompt, type "select partition (number)."
Step 4. Determine the partition type and unhide the partition. The hidden PQService partition will be either a type 27 or a type 12 partition. If the partition is type 27, unhide it by typing "set id=07 override," and if a type 12, then unhide it by typing "set id=0B" at the command prompt.
Step 5. View PQService partition. Return to the disk containing PQService by typing "select disk 0" at the command prompt, and then type "list volume" to view the contents of the disk. PQService will be visible in the list, preceded by a number. Type "select volume (number)" and then assign PQService a new drive letter so you will be able to open and view it from your computer interface window. At the command prompt, type "assign letter=f."
Reset eRecovery Password
Step 1. Open PQService. Navigate to the drive containing PQService. If you are using Windows XP, use My Computer; if you are using windows Vista, use Computer. Find the file "aimdrs.dat." Right click on the file and select "Open with" and then "Textpad," "Notepad," or whatever text editor you prefer.
Step 2. Open file and find password. Open the file with your text editor and locate the eRecovery password. Look for a line that reads, "Password=password name," "Hint=the password hint." Write down the password and close the file.
Step 3. Open eRecovery using the recovered password and follow instructions to create a new password.

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on May 18, 2010 | Computers & Internet

1 Answer

Dell error Ox0000225


An unexpected error has occurred.
Boot selection failed because a required device is inaccessible.

how-to-fix-boot-error-0xc0000225.png
A general group of people will initiate a fresh install upfront. However, it is to inform you that the problem is not as severe as it seems. To recover from the situation, it would require a Windows installation disc, as you are already incapable to boot into Windows. Listed below are the possible solutions for this issue, depending upon the reason of its occurrence.
  • Rebuild Boot Configuration Data (BCD)
  • Configure Active Partition
  • Restore Master Boot Record (MBR)
Rebuild Boot Configuration Data (BCD)
The resolution is helpful, when your system is facing a spoiled Boot Configuration Data (BCD). In such a situation, it is recommended to rebuild this component of windows through command prompt. See below for a systematic procedure.
  • Insert Windows Installation Disk and Restart your computer
  • Select Time, Language, and click on the Next button
  • Click on the words stating Repair your computer in the lower left corner
  • Identify and access your system drive (For Example, C: D: E: etc.) and click Next
  • In the System Recovery Options box, choose Command Prompt
  • In the command prompt, type the command BOOTREC /REBUILDBCD and hit Enter
Configure Active Partition
The error 0xc0000225 may also result due to a wrong partition selected. The instance is that a user divides its storage device into several partitions. The BIOS must access the partition having system files on it (also called as System Drive). While accessing a wrong partition, it would end up in this issue.
  • Insert Windows Installation Disk and Restart your computer
  • Carry out the above given steps to reach System Recovery Options box
  • Among several system recovery options, choose Command Prompt
  • To set a correct partition, type the command line DISKPART and press Enter key
  • In the listed partitions, determine the one to be active and type following command line
  • SELECT PARTITION X (Let X be your desired active partition) and press Enter
  • Once the partition is selected, type the command line ACTIVE and then press Enter
  • Type QUIT and press enter to exit and then Restart the system
Restore Master Boot Record (MBR)
MBR is a boot sector containing information of logical partitions and file systems. An agitating MBR can also prevent you from normally booting into your Windows operating system. If this is the issue with your PC, try following steps to restore your MBR.
  • Insert Windows Installation disk and Restart your computer
  • Corry out the above given steps to reach System Recovery Options box
  • Among several system recovery options, choose Command Prompt
  • Enter the Diskpart and type the command line SELECT DISK 0 and press Enter
  • Now type LIST VOLUME and press Enter key to view a new list
  • Locate the CD/DVD-ROM under Type column and note down its letter under LTR column
  • Close Diskpart by typing Exit and pressing Enter.
  • Now access the CD Drive by typing F: and hitting Enter (Let F: be the CD/DVD-ROM letter)
  • Type and enter CD BOOT and then DIR to view the directory within the drive
  • Now type and enter BOOTSECT /NT60 SYS /MBR
  • Type Exit and press Enter
At the completion of process, you will see a success message saying, Bootcode was successfully updated on all targeted volumes. Now you must not have any issue while booting into your Operating system.
Fix Boot Error 0xc0000225 in Windows 7

Jul 07, 2014 | Dell Inspiron Computers & Internet

1 Answer

Reformatting HCS725032VLA380


Is it your primary hard drive ?
Reformat hard drive to NTFS Windows XP allows you to easily format the hard drives with its inbuilt utility. Formatting the hard drive would forever delete all the files stored on it. There are two ways in which you can format the hard disk partition - from My Computer and from DOS. You cannot have a NTFS partition with allocation unit s above 4096.

Click on "Start," and then click on "My Computer." Right-click on the disk partition to format and then click on "Format." Click on the "File System" drop down box and select "NTFS." Click on the "Allocation unit " drop down box and select an allocation . It is recommended that you select the "Default allocation " option. Click on the "Start" button. b> Format the Partition from DOS b> Click on "Start," and then click on "Run." Type "cmd" in the 'Run' dialog box and then press "Enter." Type "format drive_letter: /FS:NTFS" at the command prompt and then press "Enter." Replace the 'drive_letter' here with the letter of the drive that you want to format (for example, format e: /FS:NTFS). For help on advanced formatting options, type "format/?'more" at the command prompt and then press "Enter." Keep pressing "Enter" as you read on. Hope it helps

Jan 24, 2013 | Hitachi CinemaStar 7K500 HCS725032VLA380...

Tip

Creating Bootable USB Flash Drive.


The USB Flash Drive must be configured with an active primary MS-DOS partition. It must also contain the boot files. Follow the steps below to create a bootable USB Flash Drive.
Requirements:
  • Motherboard with BIOS that supports USB boot.
  • USB Flash Drive that may be erased.
  • Bootable floppy disk or CD with Fdisk and Format commands.
Directions:
  1. Plug in the USB Flash Drive.
  2. Make the USB drive the only bootable hard drive. Method 1:
    If available, change the BIOS settings for the hard drive sequence, making sure the USB device is at the top of the list above all other hard drives. Not all BIOS Setup Utilities have this option. Method 2:
    Disable all hard drives in the BIOS. In some BIOS Setup Utilities you can disable the individual hard drives, while in others you will need to disable the controller. Method 3:
    Unplug all hard drive cables inside the case. If the cables are unplugged the computer cannot detect and boot to the hard drive.
  3. Insert the bootable floppy disk or CD into the appropriate drive.
  4. Restart the computer to the bootable floppy disk or CD.
  5. At the command prompt, type: FDisk.
  6. Delete and create a new active primary DOS partition.
  7. Use FDisk to delete all partitions from the USB Flash Drive.
    • In FDisk, press the 3 key to Delete partition or Logical DOS Drive.
    • If there is just one partition on the drive, choose 1 to delete the primary DOS partition. If there are several partitions, the extended and logical partitions must be deleted before the primary partition.
    • After choosing option 1, the screen appears with partition information and a prompt for the partition to delete. Choose which primary DOS partition to delete, and then press ENTER.
    • A prompt appears to enter the volume label of the hard drive. Enter the label exactly as it appears on the top of the screen in the partition information. If the volume label contains gibberish or lowercase letters, the partition will have to be deleted as a non-DOS partition. Try using the option to delete a non-DOS partition in FDISK. After entering the volume label, press ENTER.
    • You are prompted if it should delete the partition. Press Y for Yes, and then press ENTER.
    • The screen changes to show only the total disk space and a line near the bottom that prompts that the primary DOS partition has been deleted. Press the ESC key to return to the main menu.
  8. Use FDisk to create a primary partition on the USB Flash Drive. The drive letter will be C:, since all other hard drives were disabled in step 2.
    • In FDisk, press 1 to Create DOS partition or Logical DOS drive.
    • Press 1 to Create a Primary DOS Partition.
    • The next screen prompts if the maximum hard disk size should be made into one partition. Press the Y key, and then press ENTER.
    • The next screen prompts that the computer will now reboot. Press ENTER to continue.
  9. Exit FDisk and restart the computer.
  10. Start the computer from the bootable floppy disk or CD with the USB Flash Drive still connected.
  11. At the command prompt, run Format by typing the following command: Format c: /s. Press ENTER.
  12. At the command prompt, run FDisk by typing following command: Fdisk /mbr. Press ENTER.
  13. Restart the computer without the bootable floppy disk or CD, and attempt to boot to the USB Flash Drive. If it works, it should go to a C:\> command prompt.
  14. Change the settings made in step 2 back so that the computer operates normally again.

on Mar 31, 2010 | Computers & Internet

2 Answers

Hi, I've just installed a WD 500gb hard drive to my acer 5720z laptop & used the recovery cd to reinstall windows but my hard drive seems to be locked down to 54gb which is what the original drive...


Nigel, Older versions of Windows did not have the ability to see the larger drivers. You have two answers here. First if you want to load Windows with the larger drive than you can not use the restore. You will have to load XP manually hopefully with the lastest SP (3) and have the lastest hard driver controller driver to recognize the larger size drive. The best answer is to do the recovery as planned leave the drive at 54GB for now. Once done do all your updates. I mean all. These updates are key to preventing malware and spyware. Once done you can look at Cnet.com and look for a free partition management software. If you do this abit then read the reveiws and buy one. You'll be impressed with the little tools it comes with. It will allow you to see and expand your drive to it full size. It's your best and easiest answer. Good Luck.

Jun 28, 2011 | Western Digital Scorpio WD1600BEVS 160 GB...

1 Answer

I want to downgrade my desktop acer aspire x1800 vista to xp pro everytime i run set-up it always showing me an error could not proceed,.


Most like ly the hard drive has a Vista recovery partition. That partition has got to be deleted. You'll need to open a command prompt and follow the guide very carefully or irreperable damage could occur.

Here’s the trick to delete and remove the EISA recovery or diagnostic partition in Vista. Before proceeding with the deletion action, make sure that at least a set of Recovery Disc Media has been created. Else, you won’t be able to restore your computer to working and factory default condition when any problem on PC requires reinstallation.
  1. Open a command prompt as administrator.
  2. Run Diskpart application by typing Diskpart in the command prompt.
  3. In the “Diskpart” prompt, enter rescan command and press Enter key to re-scan all partitions, volumes and drives available.
  4. Then type in list disk and press Enter key to show all hard disk drive available.
  5. Select the disk that contains the partition you want to remove. Normally, with just 1 hard disk, it will be disk 0. So the command will be:
select disk 0
Finish by Enter key.
  1. Type list partition and press Enter key to show all available and created partition in the disk selected.
  2. Select the partition that wanted to be deleted by using the following command, followed by Enter key:
select partition x
where x is the number of the EISA based recovery partition to be removed and unlocked its space. Be careful with the number of this partition, as wrong number may get data wipes off.
  1. Finally, type in delete partition override and press Enter key.
Once the partition has been deleted, exit from Diskpart, and now users can use the much familiar and much easier Disk Management tool in Windows (diskmgmt.msc) to manipulate the freed unallocated partition. Users can create a new volume (partition) with this space, or simply merge it to existing partition by extending the size of the existing partition.

Oct 08, 2009 | Computers & Internet

1 Answer

Hello my name is Michael. I would appreciate some help i have an acer aspire 5920 ad would like to reformat it however when i start the computer in any mode including safe mode it says start up repair...


Hi Michael,
Its possible to reformat your hard drive by using a DOS boot floppy disk or CD. You can create this disk on another pc then boot your pc from this disk. It will boot your pc to a DOS prompt, usually "C:>" from there you can create partitions, delete partitions and format the hard drive. The command for creating partitions is FDISK.exe. Make sure your boot disk has the FDISK.exe command on it.
Let me know if you require any further assistance regarding this.
Best wishes,
Graemevm

Jun 12, 2009 | Acer Aspire 5920-6727 Notebook

1 Answer

Reformatting Harddrive


You can format from the bootdisk by running the fdisk command from the prompt. Than you can reinstall windows 98. In my personal opinion, you should really upgrade your operating system. Still running windows 98 is a major security issue.

Jan 09, 2009 | Computers & Internet

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