$ dd if=/dev/zero of=/dev/sda status=progress count=1 seek=1953525120
1+0 records in
1+0 records out
512 bytes copied, 0.00405196 s, 126 kB/s

$ dd if=/dev/zero of=/dev/sda status=progress count=1 seek=1953525119
1+0 records in
1+0 records out
512 bytes copied, 0.00397515 s, 129 kB/s

$ dd if=/dev/zero of=/dev/sda status=progress count=1 seek=1953525121
1+0 records in
1+0 records out
512 bytes copied, 0.00398078 s, 129 kB/s

$ badblocks -b 512 -vws /dev/sda 1953525120 1953525120
Checking for bad blocks in read-write mode
From block 1953525120 to 1953525120
Testing with pattern 0xaa: done
Reading and comparing: done
Testing with pattern 0x55: done
Reading and comparing: done
Testing with pattern 0xff: done
Reading and comparing: done
Testing with pattern 0x00: done
Reading and comparing: done
Pass completed, 0 bad blocks found. (0/0/0 errors)

$ badblocks -b 512 -vws /dev/sda 1953525119 1953525119
Checking for bad blocks in read-write mode
From block 1953525119 to 1953525119
Testing with pattern 0xaa: done
Reading and comparing: done
Testing with pattern 0x55: done
Reading and comparing: done
Testing with pattern 0xff: done
Reading and comparing: done
Testing with pattern 0x00: done
Reading and comparing: done
Pass completed, 0 bad blocks found. (0/0/0 errors)

$ badblocks -b 512 -vws /dev/sda 1953525121 1953525121
Checking for bad blocks in read-write mode
From block 1953525121 to 1953525121
Testing with pattern 0xaa: done
Reading and comparing: done
Testing with pattern 0x55: done
Reading and comparing: done
Testing with pattern 0xff: done
Reading and comparing: done
Testing with pattern 0x00: done
Reading and comparing: done
Pass completed, 0 bad blocks found. (0/0/0 errors)

$ dd if=/dev/zero of=/dev/sda bs=4M status=progress
1000144371712 bytes (1.0 TB, 931 GiB) copied, 8290.05 s, 121 MB/s
dd: error writing '/dev/sda': Input/output error
238468+0 records in
238467+0 records out
1004499828735 bytes (1.0 TB, 936 GiB) copied, 8291.49 s, 121 MB/s