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CrystalDiskMark is an open source disk drive benchmark tool for Microsoft Windows from Crystal Dew World. Based on Microsoft's MIT-licensed Diskspd tool, [2] this graphical benchmark is commonly used for testing the performance of solid-state storage. [3] [4] It works by reading and writing through the filesystem in a volume-dependent way.
Rotational latency (sometimes called rotational delay or just latency) is the delay waiting for the rotation of the disk to bring the required disk sector under the read-write head. [22] It depends on the rotational speed of a disk (or spindle motor), measured in revolutions per minute (RPM).
Electrical tests might include a test of buffer RAM, a read/write circuitry test, or a test of the read/write head elements. Mechanical test includes seeking and servo on data tracks. Scans small parts of the drive's surface (area is vendor-specific and there is a time limit on the test). Checks the list of pending sectors that may have read ...
Name Operating system License User interface Fixed drives USB, eSATA and removable drives RAID support [a] Shows S.M.A.R.T. attributes Hard drive self-testing Notification
Up to [neutrality is disputed] 3.2 GB/s sequential read, 1.9 GB/s sequential write [25] Samsung SSD 960 PRO SSD Up to [neutrality is disputed] 440,000 read IOPS Up to [neutrality is disputed] 360,000 write IOPS [25] [non-primary source needed] NVMe over PCIe 3.0 x4, M.2: 4kB aligned random I/O with four workers at QD4 (effectively QD16), [26] 1 ...
The command supports physical and virtual storage including hard disk drive (HDD), solid state devices , and solid state hybrid drives . [5] It provides control over the testing methods, duration, threads, queues, IO and processor affinity, and reporting. [6] In 2024, the command was updated to handle modern workloads and hardware like NVMe.
Any read request can be serviced and handled by any drive in the array; thus, depending on the nature of I/O load, random read performance of a RAID 1 array may equal up to the sum of each member's performance, [a] while the write performance remains at the level of a single disk. However, if disks with different speeds are used in a RAID 1 ...
It measures various performance characteristics and capabilities of the hardware it is running on and reports them as a Windows Experience Index (WEI) score. The WEI includes five subscores: processor, memory, 2D graphics, 3D graphics, and disk; the basescore is equal to the lowest of the subscores and is not an average of the subscores.