Производительность HDD, SSD и разных RAID.

2 x 256 GB SSD / SAMSUNG MZ7TE256HMHP-00000 / Sotfware RAID1

scheduler: cfq
random read: 86987 IOPS 347951 KB/s latency 912.99 usec
random write: 51353 IOPS 205413 KB/s latency 1545.20 usec

scheduler: deadline
random read: 182302 IOPS 729208 KB/s latency 429.78 usec
random write: 44639 IOPS 178558 KB/s latency 1756.07 usec

2 x 2,000 GB SATA 7200 rpm / WCC1P1131522 / Software RAID1

random read: 288 IOPS 1154.1 KB/s latency 264.50 msec
random write: 181 IOPS 745202 B/s latency 415.19 msec

4 x Samsung SSD 850 PRO 512GB / RAID 10 / HP Smart Array G6 P410

random read: 19159 IOPS 76638 KB/s latency 4161.38 usec
random write: 5509 IOPS 22038 KB/s latency 14471.15 usec

2 x 500 GB SATA / Western Digital Caviar Green / WDC WD5000AADS-00S9B0 / Software RAID1

random read: 227 IOPS 932185 B/s latency 347.97 msec
random write: 203 IOPS 834436 B/s latency 385097.37 usec

2 x 320 GB SATA 5400 rpm 8 MB Cache / Western Digital Scorpio Blue / WDC WD3200BEVT-00A23T0 / Software RAID1

random read: 233 IOPS 956200 B/s latency 338.61 msec
random write: 96 IOPS 394538 B/s latency 821.17 msec

2 x Samsung SSD 840 EVO 250GB / Software RAID1

scheduler: cfq
random read: 56597 IOPS 226388 KB/s latency 1381.58 usec
random write: 24671 IOPS 98688 KB/s latency 3199.20 usec

scheduler: deadline
random read: 65277 IOPS 261110 KB/s latency 1202.74 usec
random write: 34114 IOPS 136456 KB/s latency 2308.01 usec

2 x 2000 GB SATA 7200 rpm 64 MB Cache / TOSHIBA DT01ACA200 / Software RAID1

random read: 224 IOPS 918622 B/s latency 345647.33 usec
random write: 200 IOPS 819836 B/s latency 387.69 msec

2 x 3000 GB SATA 7200 rpm 64 MB Cache / TOSHIBA DT01ACA300 / Software RAID1

random read: 239 IOPS 980542 B/s latency 318678.24 usec
random write: 309 IOPS 1238.6 KB/s latency 253217.40 usec

2 x 2.00 TB SATA 7200 rpm 64 MB Cache / Western Digital RE4 / WDC WD2000FYYZ-01UL1B1 / Software RAID1

random read: 528 IOPS 2113.3 KB/s latency 150594.23 usec
random write: 393 IOPS 1575.1 KB/s latency 202245.12 usec

2 x 250GB Samsung SSD 840 EVO / Samsung based SSDs / Software RAID1

random read: 62214 IOPS 248860 KB/s latency 1262.11 usec
random write: 29230 IOPS 116921 KB/s latency 2709.18 usec

2 x 256 GB Samsung SSD 850 / EXM0 / Software RAID0

random read: 166248 IOPS 664994 KB/s latency 469.20 usec
random write: 6929 IOPS 27720 KB/s latency 11.33 msec

2 x 2.00 TB SATA 7200 rpm 64 MB Cache / Western Digital Red / WDC WD20EFRX-68EUZN0 / Software RAID1

random read: 289 IOPS 1158.8 KB/s latency 260.57 msec
random write: 285 IOPS 1142.8 KB/s latency 274759.26 usec

1 x 256 GB SSD SAMSUNG MZ7TE256HMHP-00000

random read: 95130 IOPS 380521 KB/s latency 838.48 usec
random write: 65079 IOPS 260317 KB/s latency 1222.40 usec

2 x 3.00 TB SATA 7200 rpm 64 MB Cache / Toshiba 3.5" HDD DT01ACA / TOSHIBA DT01ACA300 / Software RAID1

random read: 374 IOPS 1497.4 KB/s latency 211790.09 usec
random write: 322 IOPS 1291.4 KB/s latency 246816.60 usec

3 x 1.00 TB SATA 5400 rpm / WDC WD10SPCX-75HWST0 / Western Digital Blue Mobile / Sortware RAID0

random read: 381 IOPS 1524.2 KB/s latency 208.86 msec
random write: 588 IOPS 2353.1 KB/s latency 134656.43 usec

2 x 4.00 TB SATA 7200 rpm / TOSHIBA MD04ACA400 / Software RAID1

random read: 528 IOPS 2114.6 KB/s latency 150433.62 usec
random write: 250 IOPS 1003.9 KB/s latency 317.78 msec

1 x 500 GB SATA / Seagate Barracuda 7200.12 / ST3500418AS

random read: 253 IOPS 1013.2 KB/s latency 313.74 msec
random write: 267 IOPS 1070.6 KB/s latency 298526.68 usec

2 x 500 GB SATA / Seagate Barracuda 7200.12 / ST3500418AS / Software RAID1

random read: 455 IOPS 1823.1 KB/s latency 173.59 msec
random write: 247 IOPS 989.38 KB/s latency 322.55 msec

2 x 500 GB SATA / Seagate Barracuda 7200.12 / ST3500418AS / Software RAID0

random read: 640 IOPS 2561.4 KB/s latency 124.33 msec
random write: 553 IOPS 2212.2 KB/s latency 144101.60 usec

1 x 250 GB SSD / Samsung SSD 850 EVO 250GB

random read: 44368 IOPS 177474 KB/s latency 1798.86 usec
random write: 71613 IOPS 286456 KB/s latency 1110.16 usec

2 x 250 GB SSD / Samsung SSD 850 EVO 250GB / Software RAID1

random read: 114806 IOPS 459226 KB/s latency 132.44 usec
random write: 60714 IOPS 242859 KB/s latency 248.01 usec