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Zorluk: ZormacOS and Linux Operating System Features and Tools

A Linux systems administrator is troubleshooting a storage drive that is experiencing read errors and failing S.M.A.R.T. health checks. The administrator needs to perform a bit-by-bit raw clone of the entire physical drive located at /dev/sdb to an image file at /mnt/backups/disk_copy.img before attempting file recovery. Which of the following command-line utilities and syntax should the administrator execute to perform this raw block-level copy?

  1. dd if=/dev/sdb of=/mnt/backups/disk_copy.imgCevap
  2. B
    rsync -avz /dev/sdb /mnt/backups/disk_copy.img
  3. C
    tar -czvf /mnt/backups/disk_copy.img /dev/sdb
  4. D
    cp -r /dev/sdb /mnt/backups/disk_copy.img

Cevap

The dd utility specifying if=/dev/sdb and of=/mnt/backups/disk_copy.img is the correct command for creating a raw, block-level clone of a drive.
The dd command (data duplicate) is specifically designed for low-level block copying and conversion operations in Unix-like operating systems. By specifying the input file/device with 'if=/dev/sdb' and the output destination with 'of=/mnt/backups/disk_copy.img', dd reads raw data blocks directly from the physical disk device node and writes an exact byte-for-byte binary replica to the target file.

Adım Adım Çözüm

1
Identify the requirement for disk cloning.
Recognize that a bit-by-bit raw block copy requires reading raw storage blocks directly from a device node rather than traversing a file system.
File-level utilities cannot copy master boot records, partition structures, or unallocated sectors.
2
Evaluate Unix command-line options for block-level data duplication.
Determine that dd (data duplicate / disk duplicate) uses input file (if=) and output file (of=) parameters to read and write block data directly.
dd operates below the file system layer, copying raw data streams between block devices and files.
3
Select the correct command syntax.
Confirm dd if=/dev/sdb of=/mnt/backups/disk_copy.img correctly specifies /dev/sdb as input and the image path as output.
This syntax creates an exact byte-for-byte image file of the failing drive.

Anahtar Kavram

Using the dd command for low-level raw disk cloning and imaging in Linux/macOS environments.
Tahmini Süre:1m 30s
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macOS and Linux Operating System Features and Tools

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