Win2k "secret weapon" disk editing (2)

Problems with DiskProbe using disk editing tools

First, how to deal with machines that cannot run windows2000?

As of now, the operations described are all based on the premise that Windows 2000 can run, using the repair tool DiskProbe. If Windows 2000 can't run, or can't run in the normal way, what should I do?

1. If there is a problem with the master boot record, you can start the dos with a floppy drive or CD-ROM drive and ensure that there is a FDISK command file, then execute: FDISK/MBR, which is an unconditional write master boot record.

2. If you can boot from Safe Mode, you can use the Fixboot command in the Recovery Console. See the recovery console help file for the use of this command.

3. You can start the command line tool CMD first and then perform the repair work.

4. If you have another working computer, you can attach the problematic hard drive to it and fix it.

5. Use other tools to fix it, such as the Debug tool, but this requires a backup file or a correct master boot record.

Second, under what conditions can DiskProbe not be used?

1. Since DiskProbe does not support FAT32 file system, when your windows2000 file system is FAT32, the partition information will be displayed in the box, and the FAT32 partition will be displayed as “Unknown” (Unknown). . But FAT16 and NTFS can be displayed normally.

2. This tool is not available for dynamic disk systems. The so-called dynamic disk does not refer to the usual type of mobile hard disk. It is a disk array or a disk group. Common combinations are: striped, mirrored, or RAID-5. This was originally a method for pursuing high-speed access and using two or more hard disks as one hard disk. At this time, each hard disk is only responsible for storing a fraction of all access tasks, and the speed is of course fast. The disadvantage is that the cost is too high, and as long as one of the hard disks is damaged, the data on all the hard disks cannot be used. It is the real "Jade and Burns"! To improve the reliability of such devices, you can use two or more groups in parallel at the same time. Even if there is damage in a group, you can use an uncorrupted group, of course, the cost is even higher.

Third, fault tolerant fault tolerance

If you use windowsNT to create a "volume" (logical drive), the partition table will set an FT (fault tolerant fault tolerance) bit, this bit It is related to the HKEY_LOCAL_MACHINESYSTEMDISK subkey value in the registry. However, in a multi-boot system, the use of FT bits in volumes other than NTFS systems is not allowed. In addition, Windows 2000 allows the original Windows NT FT-bit volume to be upgraded to a dynamic disk using an external program.

Fourth, Ntldr file

If the primary partition is in FAT16 mode, and an extended partition is in NTFS format, when the partition is not normal, pay attention to a name of Ntldr. File, this is a file that is set to the system s, hidden h, read-only r properties. At this time, you can use the floppy disk to start the machine. In DOS mode, first change the properties of the Ntldr file, and ask the floppy disk to have the corresponding DOS external command. At this point you can execute the following command:

a:dosattrib -s -h -r c:ntldr

The above command can remove the s, h, r attributes. If you add these attributes, you can execute:

a:dosattrib +s +h +rc:ntldr

Assume that the other (FAT16 mode primary and extended partitions) are normal, but the ntldr file is corrupted. Or if it is lost, the screen can have such a message:

NTLDR is missing

Press any key to restart

If the primary partition is also in NTFS mode, the above problem is displayed. The prompt message is:

NTLDR is missing

Press Ctrl+Alt+Del to restart

The presence of this information means the boot code and the contents of the boot sector. It is normal, the problem is likely to be in the ntldr file. If you do not see the above message, the problem may be in the boot code or boot sector.

V. The boot sector that can be backed up or replied using the DiskProbe tool is

a. The primary partition

b. The logical volume (logical drive) in the extended partition

c. Expanding individual boot sectors within a partition

d. Volumes for various dynamic disks. For example: spanned, striped, mirrored, or RAID-5 and so on.

Sixth, boot sector (or partition table) backup

For insurance, the boot sector (or partition table) information should be backed up to a file and saved on a reliable floppy disk Long file names can be used in the DiskProbe tool. The file name is recommended to use the relevant information of the sector and partition table to facilitate identification and recovery. This tool can also be used in windows9.x systems. But there will be some restrictions. The reason is that in Windows 9.x, access to the physical sector of the disk must use the INT13 interrupt in the BIOS, but in order to prevent the virus from attacking the system, in Windows 2000, access to the physical sector of the disk has been used in an alternative way, instead of Then use INT13 to interrupt. Even so, the basic functions are still available, so I have verified it on a computer and can actually display and back up the sector information (the write operation is not verified because it is too dangerous).

In the Windows 2000 support tool, the disk editing section provides a very detailed English help file, which is very large. File name: dskprtrb.doc. The location is within the directory where the support tool is installed. There are many valuable things, and interested friends can refer to them.