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Large Drive Tools (LDT)


Click to Zoom ImageLarge Drive Tools contains 16 useful features packed into one powerful low-level disk tool make this a must for any PC user.

Self-Bootable Disk or CD-ROM requires no operating system to operate.  This offers an advantage over other disk utilities in that there is no concern about whether a running operating system is in place, or that the operating system is compatible with Large Drive Tools.  LDT starts itself and requires no operating system--it will always work when you need it most!

Supports any BIOS accessible drive including very large drives and RAID volumes 200+Gb and larger.  If your drive can boot an operating system, you can work on it with Large Drive Tools.

LDT is available for a free evaluation, Go to Download now.

Read more about each feature in detail:  View Drive Information | Blink Drive Light | Scan Entire Drive / Scan All Drives for Media Defects | View or Edit Partition Table | View, Search, or Edit Entire Drive | Copy Sectors | Repair Master Boot Record | Analyze or Update Boot Sectors | Delete All Partitions | Erase Entire Drive

View Drive Information

Click to Zoom ImageShows exactly how your BIOS recognizes the drive.  Indicates drive size, total sectors, drive geometry including cylinders, heads, and sectors, and whether the drive can be accessed using extended Int13 calls or traditional Int13.

This is very useful to see if the BIOS has recognized the hard drive properly.  Incorrectly recognized hard drives can cause serious problems when installing an operating system.

Scan Entire Drive / Scan All Drives for Media Defects
Click to Zoom ImageScans a drive to determine and report if any sectors are unreadable.  Unreadable sectors (also called bad sectors) can cause serious problems for operating systems.

Many modern drives have a technique to mask unreadable sectors by reassigning them to a spare sector.  When an unreadable sector is reassigned, it appears that the unreadable sector is no longer bad.  Some drives require that the unreadable sector is written to before the assign occurs which is why a drive that develops bad sectors often needs to be erased to eliminate all the unreadable sectors.  If a drive keeps developing bad sectors, then it is likely that something mechanical in the drive is at fault and the data on the drive is in serious danger. 

Use LDT to scan the entire drive on a regular basis to make sure the data is safe!  Errors can be printed on an attached local printers.

View or Edit Partition Table
Click to Zoom ImageAllows complete Partition Table analysis and editing via easy menu driven dialogs.

The partition location is displayed on the graph bar at the bottom.

Each partition is listed along with its type, size, active status, and position within the partition table. 

The partition order can be easy changed by moving partitions up or down in the list.

Click to Zoom ImageChoosing Edit will drill down the partition level details and allow modification of any values.

The partition type, active status, start LBA, number of sectors, size, CHS type, both actual and stored starting and ending CHS values.

A change to the start LBA or number of sectors will automatically adjust all the CHS values or vice versa.

Delete All Partitions
Click to Zoom ImagesQuickly deletes all partitions on a drive without altering the Master Boot Record code.

Of course, LDT always makes the user type the word 'yes' in and choose accept before any partitions are deleted.

Copy Sectors

Click to Zoom ImageCopies sectors from one part of a drive to another part, or from a source drive to a target drive.

The direction of the copy is automatically selected to ensure that the copy is done properly even when the source and target areas to be copied overlap.

Now LDT has a scripting feature that allows you to automate more than one copy sectors task.  You can copy from a floppy file to hard disk, hard disk to file, hard disk to same hard disk, or hard disk to a different hard disk.

Erase Entire Drive
Click to Zoom ImageThis is VERY handy to have when selling or even throwing away that old hard disk.

Erases a drive using two methods.  Which method is needed depends on the level of security desired.  Whether just making sure a virus is completely destroyed, returning a drive to a factory fresh empty state, or erasing personal or critical information before selling or throwing the drive away, this erase function can handle the job!

Of course, LDT always makes the user type the word 'yes' in and choose accept before any data is erased.

Click to Zoom ImageThe first method simply writes 0's to every accessible sector on the drive, effectively erasing everything and returning the drive to a factory fresh empty state.

The second method is much more secure in that it will write 7 random passes of data followed by a final pass of all 0's to every accessible sector on the drive.  This takes 8 times longer than the first method, but is used when the data on the drive absolutely must be destroyed.

View, Search, or Edit Entire Drive

Click to Zoom ImageAllows any sector on the drive to be viewed, searched, or edited.

Both the hexadecimal values and characters are displayed simultaneously along with a graph bar of the current position on the drive.

Editing can be done by entering the hexadecimal values or typing the actual characters.

Searching can be done by specifying the text to search for, or the actual hexadecimal bytes to search for.  Options to ignore case, enable XOR, and enable unicode searching assist in locating data.

XOR mode supports flipping all the bits in the sector to reveal the information if the sector was written as an XOR sector.  This is common among RAID5 arrays.  XOR also supports editing mode.

Repair Master Boot Record
Click to Zoom ImageRepairs the Master Boot Record (MBR) on a drive without damaging any existing partitions.

This MBR is capable booting operating systems well past the traditional limit of 1024 cylinders because it is Int13 Extended aware.

Analyze or Update Boot Sectors
Click to Zoom ImageAnalyzes a boot sector on a selected partition to determine if it is a recognized one and reports what is found.

Updates partition boot sectors with any of 13 common boot sectors for FAT, FAT32, and NTFS file systems.  Automatically suggests which boot sector based on partition type, but allows user to override and choose any boot sector if desired.

A special boot sector has also been included that allows DOS users to boot DOS partitions up to the 7.8Gb limitation.  Before this boot sector was available, DOS partitions after 2Gb on a drive would not boot properly even though DOS could access them fully.

Blink Drive Light

Click to Zoom ImageBlinks the drive light or lights to indicate which drive in the BIOS correlates to the actual physical drive or drives.

Blink drive light also works with RAID arrays and will actually blink all the members of the array.

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