Other 840 EVO results are about 50-60 MB/s. Crystal disk mark cant really be the right tool to test the underlying RAID performance. WRITEZERO0 Set whether to write zeroes or randoms to testfile (random is the default for both fio and crystaldiskmark) dd benchmarks typically only write zeroes which is why there can be a speed difference. Excellent Sequentials Top-Notch PCMark Score Cool, Low-Power 8nm Controller Better At Low Queue Depths. oinkypig said: Those 4k tests are the best results ive ever seen. The gap between the best and the worst is just about 1, which is nothing in such a long and deep test. I ran the test 5 times on each LUNs last night (Only possible outside effect to scew results is data being sent on the same switch to the SAN from Servers (I have a RAID1, RAID 10 with 6 disks and a RAID 10 with 8 disks). SIZE1024 Size of each test, multiples of 32 recommended for Q32 tests to give the most accurate results. CDM6 might be newer than five, but the results are the same. Any advice on where to start would be great 🙂

utility that allows for reading and monitoring drive statues. It is an open-source tool that is safe to use for checking the health of your drives.

SAN design/performance/monitoring is something i want to look into and start doing as we dont really do it here. CrystalDiskMark is a free disk drive benchmark app available for Microsoft Windows to test your hard disk and solid-state drive performance.

Crystal disk mark results