Samsung 860 EVO 250GB SATA mérési eredmények után ha valakit érdekelnek a WD Blue 3D 500GB SATA ereményei:

ubyegon@WD-HP8570p:~$ time sh -c "dd if=/dev/zero of=testfile bs=100k count=1k && sync"
1024+0 records in
1024+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0,0751326 s, 1,4 GB/s

real 0m0,331s
user 0m0,009s
sys 0m0,074s

ubyegon@WD-HP8570p:~$ sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync
1024+0 records in
1024+0 records out
1073741824 bytes (1,1 GB, 1,0 GiB) copied, 0,562397 s, 1,9 GB/s

ubyegon@WD-HP8570p:~$ dd if=tempfile of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1,1 GB, 1,0 GiB) copied, 0,149026 s, 7,2 GB/s

ubyegon@WD-HP8570p:~$ sudo /sbin/sysctl -w vm.drop_caches=3
[sudo] password for ubyegon:
vm.drop_caches = 3
ubyegon@WD-HP8570p:~$ dd if=tempfile of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1,1 GB, 1,0 GiB) copied, 2,04557 s, 525 MB/s

ubyegon@WD-HP8570p:~$ sudo hdparm -Tt /dev/sda

/dev/sda:
Timing cached reads: 15934 MB in 1.99 seconds = 7993.07 MB/sec
Timing buffered disk reads: 1578 MB in 3.00 seconds = 525.34 MB/sec
ubyegon@WD-HP8570p:~$ time sh -c "dd if=/dev/zero of=testfile bs=100k count=1k oflag=sync"
1024+0 records in
1024+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2,03059 s, 51,6 MB/s

real 0m2,034s
user 0m0,006s
sys 0m0,341s

A használatba vétel előtti teszt képek:

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