which test is important on crystal disk mark

The memory on the drive may be fast in sequential reads/writes, but if the controller can't keep up with the random requests, it may still prove slow in day-to-day use. Random read/write is when data may be found on different parts of the disk, so the controller needs to be able to find these different parts to read/write efficiently and fast. Sequential is generally the simpler of the two, it's reading or writing data in a sequential pattern, one after the other.

Writing: when you are creating/editing a file and making new data to be saved. Read: reading a file, which would include opening a file, opening a program, starting your OS, etc. The bottom four numbers represent random speeds, both in read and write. I'm told that some HDDs increase performance when this happens because of the way their controller logic works but I think this mostly applies to SSDs not mechanical drives.The top four numbers represent sequential speeds, both in read and write. This is faster than 4k because there's more data read/written with less movement of the head.Ĥk: The same as above but instead of reading/writing the test data in 512KB 'chunks' it reads/writes in 4KB chunks.ĤkQD32: The same as 4K but there are more requests for the data sent to the HDD controller. This is fastest because the head doesn't have to move about a lot as all the sectors are adjacent.ĥ12k: CDM read/writes to random sectors on the drive, but it reads/writes 512KB of data at a random point, then moves to the next random point. That is to say it starts writing on a sector and then writes the next part on the adjacent sector and so on. Sequential: Crystal disk mark (CDM) reads/writes whatever file size you choose when you start the test sequentially.

I'm going to take a stab at it, but i'm no expert so if anyone really knows please feel free to correct me.

Which test is important on crystal disk mark