Linux Tricks| Check your Disk's WritePerformance with dd Command
dd if=/dev/zero of=/tmp/testfile bs=1G count=1 oflag=direct
if=/dev/zero: This uses a special file that provides a stream of zeros.
of=/tmp/testfile: This is the output file where we'll write the data.
bs=1G: This sets the block size to 1 gigabyte.
count=1: This means we'll write just one block.
oflag=direct: This tells dd to use direct I/O, bypassing the cache."
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