Knowledge

IOPS

Source πŸ“

323:, 4 KB random transfers, 70/30 read/write ratio, queue depth 4, the IOPS delivered by the Intel X25-E 64 GB G1 started around 10000 IOPs, and dropped sharply after 8 minutes to 4000 IOPS, and continued to decrease gradually for the next 42 minutes. IOPS vary between 3000 and 4000 from approximately 50 minutes and onwards, for the rest of the 8+ hours the test ran. Even with the drop in random IOPS after the 50th minute, the X25-E still has much higher IOPS compared to traditional hard disk drives. Some SSDs, including the 150: 2350: 25: 550: 227:, whereas, for SSDs and similar solid state storage devices, the random IOPS numbers are primarily dependent upon the storage device's internal controller and memory interface speeds. On both types of storage devices, the sequential IOPS numbers (especially when using a large block size) typically indicate the maximum sustained bandwidth that the storage device can handle. Often sequential IOPS are reported as a simple 124:
isolation, IOPS can be considered analogous to "revolutions per minute" of an automobile engine i.e. an engine capable of spinning at 10,000 RPMs with its transmission in neutral does not convey anything of value, however an engine capable of developing specified torque and horsepower at a given number of RPMs fully describes the capabilities of the engine.
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To meaningfully describe the performance characteristics of any storage device, it is necessary to specify a minimum of three metrics simultaneously: IOPS, response time, and (application) workload. Absent simultaneous specifications of response-time and workload, IOPS are essentially meaningless. In
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and queue depth, as well as the data block sizes. There are other factors which can also affect the IOPS results including the system setup, storage drivers, OS background operations etc. Also, when testing SSDs in particular, there are preconditioning considerations that must be taken into account.
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SPECsfs2008 is the latest version of the Standard Performance Evaluation Corporation benchmark suite measuring file server throughput and response time, providing a standardized method for comparing performance across different vendor platforms.
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Some HDDs/SSDs will improve in performance as the number of outstanding IOs (i.e. queue depth) increases. This is usually the result of more advanced controller logic on the drive performing command queuing and reordering commonly called either
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controller, have shown much higher sustained write performance that more closely matches the read speed. For example, a typical operating system has many small files (such as DLLs ≀ 128 kB), so SSD is more suitable for system drive.
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The specific number of IOPS possible in any system configuration will vary greatly, depending upon the variables the tester enters into the program, including the balance of read and write operations, the mix of
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Intel's data sheet claims 3,300 IOPS and 35,000 IOPS for writes and reads, respectively. 5,000 IOPS are measured for a mix. Intel X25-E G1 has around 3 times higher IOPS compared to the Intel X25-M G2.
681:-1200 based SSD drives with enhanced firmware, states up to 50,000 IOPS, but benchmarking shows for this particular drive ~25,000 IOPS for random read and ~15,000 IOPS for random write. 2280: 1566: 165:. Random operations access locations on the storage device in a non-contiguous manner and are generally associated with small data transfer sizes, e.g. 4 kB. 1662: 2100: 1307: 312:
SSDs and USB sticks are much slower writing than reading due to the inability to rewrite directly into a previously written location forcing a procedure called
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The most common performance characteristics measured are sequential and random operations. Sequential operations access locations on the storage device in a
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Xiao-yu Hu; Eleftheriou, Evangelos; Haas, Robert; Iliadis, Ilias; Pletka, Roman (2009). "Write Amplification Analysis in Flash-Based Solid State Drives".
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Block size used when testing significantly affects the number of IOPS performed by a given drive. See below for some typical performance figures:
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Intel's data sheet claims 6,600/8,600 IOPS (80 GB/160 GB version) and 35,000 IOPS for random 4 KB writes and reads, respectively.
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HDDs either cannot do this, or their implementation is so poor that no performance benefit can be seen. Enterprise class SATA HDDs, such as the
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For HDDs and similar electromechanical storage devices, the random IOPS numbers are primarily dependent upon the storage device's random
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Flash SSDs, such as the Intel X25-E (released 2010), have much higher IOPS than traditional HDD. In a test done by Xssist, using
2079: 989: 2354: 2305: 560: 1352: 1570: 1520: 1475: 316:. This has caused hardware test sites to start to provide independently measured results when testing IOPS performance. 2161: 1115: 115:, IOPS numbers published by storage device manufacturers do not directly relate to real-world application performance. 946: 1314: 67: 1377:"G.Skill Phoenix Pro 120 GB Test - SandForce SF-1200 SSD mit 50K IOPS - HD Tune Access Time IOPS (Diagramme) (5/12)" 1091: 1714: 723:
Up to 320,000 sustained READ IOPS using 4 kB blocks, and up to 200,000 sustained WRITE IOPS using 4kB blocks
2376: 1806: 1602: 1400: 34: 2320: 1841: 1735: 1891: 1627: 1685:"Chris Mellor, The Register, July 30, 2012: "Million-plus IOPS: Kaminario smashes IBM in DRAM decimation"" 2386: 2310: 1972: 873:
1,261,145 SPECsfs2008 nfsv3 IOPs using 1,440 15k disks, across 60 shelves, with virtual storage tiering.
2381: 1799: 1901: 1776: 1376: 1659:"Kaminario Boasts Over 2 Million IOPS and 20 GB/s Throughput on a Single All-Flash K2 Storage System" 273: 228: 137: 1258: 1070: 1048: 2110: 1866: 313: 1284:"Intel's X25-E SSD Walks All Over The Competition: They Did It Again: X25-E For Servers Takes Off" 2242: 1861: 1755: 916: 576: 158: 1283: 1227: 2300: 1443: 1043: 294: 286: 282: 38: 2219: 1158:"OCZ RevoDrive 3 x2 PCIe SSD Review – 1.5GB Read/1.25GB Write/200,000 IOPS As Little As $ 699" 707:
550 MB/s sequential read, 520 MB/s sequential write on 256 GB and larger models
2032:(bankrupt, assets sold to Toshiba, which later spun off its SSD and flash business to Kioxia) 1425: 1057: 112: 1684: 1014:"SATA in the Enterprise - A 500 GB Drive Roundup | StorageReview.com - Storage Reviews" 2196: 921: 461: 383: 108: 1017: 185:
Total number of I/O operations per second (when performing a mix of read and write tests)
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drives more commonly found in servers, generally show much greater improvement, with the
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4kB aligned random I/O with four workers at QD4 (effectively QD16), 1 TB and 2 TB models
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While traditional HDDs have about the same IOPS for read and write operations, many
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550 MB/s sequential read, 470 MB/s sequential write on 128 GB model
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and Seagate Barracuda NL will improve by nearly 100% with deep queues. High-end
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4 kB aligned random I/O with four workers at QD4 (effectively QD16), 1 TB model
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Up to 300,000+ (512B Random Read IOPS) and 200,000+ (512B Random Write IOPS)
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and are generally associated with large data transfer sizes, e.g. β‰₯ 128 
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Up to 3.5 GB/s sequential read, 2.1 GB/s sequential write
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Up to 3.2 GB/s sequential read, 1.9 GB/s sequential write
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1,200,000 IOPS in SPC-1 benchmark simulating business applications
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Savvio exceeding 400 IOPSβ€”more than doubling its performance.
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Average number of sequential write I/O operations per second
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Average number of sequential read I/O operations per second
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The most common performance characteristics are as follows:
2325: 2017: 2012: 1698: 298: 290: 2259: 2254: 2229: 2202: 2029: 1137:"Intel X25-E 64GB G1, 4KB Random IOPS, iometer benchmark" 1039: 822: 786: 324: 201:
Average number of random write I/O operations per second
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Average number of random read I/O operations per second
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PCIe Rack Scale Flash Appliance. Product discontinued.
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330,000 read IOPS, 330,000 write IOPS on 512 GB model
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300,000 read IOPS, 330,000 write IOPS on 250 GB model
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330,000 read IOPS, 330,000 write IOPS on 500 GB model
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Samsung tests NVMe products with four workers at QD4
1395: 1393: 1707:"Storage Performance Council: Active SPC-1 Results" 1956:'s NAND flash SSD business and renamed it Solidigm 264: 45: 1593: 1591: 1589: 1587: 1390: 1282:Schmid, Patrick; Roos, Achim (27 February 2009). 2368: 1564: 1597: 1016:. StorageReview.com. 2006-07-13. Archived from 1650: 1584: 144: 1807: 1203:"RAID Performance Calculator - WintelGuy.com" 95:performance measurement used to characterize 1676: 940: 938: 936: 153:Random access compared to sequential access. 1226:Schmid, Patrick; Roos, Achim (2008-09-08). 1814: 1800: 1756:"Rack-Scale Flash Appliance - DSSD D5 EMC" 1464:http://www.ddrdrive.com/ddrdrive_press.pdf 1371: 1369: 1281: 1228:"Intel's X25-M Solid State Drive Reviewed" 1225: 829:14,000 read IOPS, 50,000 write IOPS at QD1 793:14,000 read IOPS, 50,000 write IOPS at QD1 705:10,000 read IOPS, 36,000 write IOPS at QD1 48:. Please do not remove this message until 1085:"SSDs - Write Amplification, TRIM and GC" 1047: 981: 933: 340: 68:Learn how and when to remove this message 1625: 575:by adding descriptive text and removing 148: 44:Relevant discussion may be found on the 2146:List of solid-state drive manufacturers 1366: 960: 897:PCIe Out of Box, up to 48 clients with 2369: 1821: 1682: 1656: 1550:: CS1 maint: archived copy as title ( 1505:: CS1 maint: archived copy as title ( 1337:: CS1 maint: archived copy as title ( 539: 136:access patterns, the number of worker 1961:Flash Forward (joint venture between 1795: 1077: 1031: 987: 1401:"Samsung SSD 850 PRO Specifications" 944: 703:4 KB aligned random I/O at QD32 543: 18: 16:Input/output performance measurement 1626:Ramseyer, Chris (18 October 2016). 1426:"Virident's tachIOn SSD flashes by" 947:"Calculate IOPS in a storage array" 739:Up to 200,000 Random Write 4k IOPS 13: 2162:Advanced Host Controller Interface 81:Input/output operations per second 14: 2398: 1179:"SSD vs. HDD: Which Do You Need?" 375:MB/s (512 KB block, random) 2349: 2348: 1090:. OCZ Technology. Archived from 548: 23: 1769: 1748: 1728: 1565:Allyn Malventano (2009-05-04). 1558: 1513: 1468: 1457: 1446:. StorageReview.com. 2011-06-28 1436: 1418: 1345: 1300: 1275: 1240: 1219: 1195: 1183:SSD vs. HDD: Which Do You Need? 1171: 968:"Getting The Hang Of IOPS v1.3" 378:MB/s (large block, sequential) 1257:. January 2010. Archived from 1150: 1129: 1108: 1006: 327:RevoDrive 3 x2 PCIe using the 1: 1705:Storage Performance Council. 927: 118: 1683:Mellor, Chris (2012-07-30). 1628:"Samsung 960 Pro SSD Review" 371:(512 KB block, random) 7: 1569:. Pcper.com. Archived from 910: 362:(64 KB block, random) 335: 145:Performance characteristics 50:conditions to do so are met 10: 2403: 1116:"Intel Solid State Drives" 988:Smith, Kent (2009-08-11). 945:Lowe, Scott (2010-02-12). 876:NFS, SMB, FC, FCoE, iSCSI 366:MB/s (64KB block, random) 356:(4 KB block, random) 2344: 2273: 2212: 2154: 2138: 2088: 1990: 1981: 1930: 1829: 815:Up to 360,000 write IOPS 779:Up to 360,000 write IOPS 610: 607: 604: 601: 598: 368: 365: 359: 353: 350: 213: 205: 197: 189: 181: 176: 173: 697:Up to 90,000 write IOPS 1862:Flash memory controller 917:Instructions per second 813:Up to 440,000 read IOPS 777:Up to 380,000 read IOPS 695:Up to 100,000 read IOPS 577:less pertinent examples 2377:Benchmarks (computing) 2286:JEDEC / JC-42, JC-64.8 1711:storageperformance.org 1603:"NVMe SSD 960 PRO/EVO" 1065:Cite journal requires 894:Up to 10 million IOPS 341:Mechanical hard drives 295:Western Digital Raptor 287:Native Command Queuing 283:Tagged Command Queuing 278: 266: 214:Sequential Write IOPS 154: 2274:Related organizations 847:Up to 2,000,000 IOPS. 289:(NCQ). Many consumer 267: 233: 206:Sequential Read IOPS 152: 109:storage area networks 2203:Universal Serial Bus 2197:Serial attached SCSI 922:Performance per watt 238: 229:Megabytes per second 1931:Flash manufacturers 1922:Write amplification 1907:Solid-state storage 1687:. Theregister.co.uk 1599:Samsung Electronics 1405:Samsung Electronics 733:OCZ RevoDrive 3 X2 573:improve the article 540:Solid-state devices 351:Drive (Type / RPM) 272:(then converted to 251:TransferSizeInBytes 231:number as follows: 37:of this article is 2387:Units of frequency 2096:Greenliant Systems 1867:Garbage collection 1823:Solid-state drives 949:. techrepublic.com 821:over PCIe 3.0 x4, 785:over PCIe 3.0 x4, 314:garbage collection 262: 198:Random Write IOPS 155: 105:solid state drives 2382:Data transmission 2364: 2363: 2296:NVMHCI Work Group 2139:SSD manufacturers 2134: 2133: 1892:Over-provisioning 1847:Flash file system 1430:theregister.co.uk 908: 907: 899:high availability 594: 593: 537: 536: 260: 252: 244: 221: 220: 190:Random Read IOPS 159:contiguous manner 78: 77: 70: 2394: 2352: 2351: 2220:HDD form factors 1988: 1987: 1887:Open-channel SSD 1816: 1809: 1802: 1793: 1792: 1787: 1786: 1773: 1767: 1766: 1764: 1763: 1752: 1746: 1745: 1743: 1742: 1732: 1726: 1725: 1723: 1722: 1713:. 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1561: 1553: 1547: 1533:on 2009-05-20 1529: 1522: 1516: 1508: 1502: 1488:on 2009-05-20 1484: 1477: 1471: 1465: 1460: 1445: 1439: 1431: 1427: 1421: 1406: 1402: 1396: 1394: 1378: 1372: 1370: 1354: 1348: 1340: 1334: 1320:on 2009-02-06 1316: 1309: 1303: 1289: 1285: 1278: 1264:on 2010-08-12 1260: 1256: 1249: 1243: 1229: 1222: 1208: 1207:wintelguy.com 1204: 1198: 1184: 1180: 1174: 1159: 1153: 1138: 1132: 1117: 1111: 1097:on 2012-05-26 1093: 1086: 1080: 1072: 1059: 1050: 1045: 1041: 1034: 1020:on 2013-05-05 1019: 1015: 1009: 991: 984: 969: 963: 948: 941: 939: 937: 932: 923: 920: 918: 915: 914: 903: 900: 896: 893: 890: 887: 884: 883: 878: 875: 872: 869: 866: 863: 862: 859: 856: 854: 851: 846: 843: 840: 837: 836: 826: 824: 820: 817: 812: 809: 806: 803: 802: 790: 788: 784: 781: 776: 773: 770: 767: 766: 763: 760: 757: 754: 751: 748: 747: 744: 741: 738: 735: 732: 731: 728: 725: 722: 719: 716: 713: 712: 702: 699: 694: 691: 688: 685: 684: 680: 677: 674: 672:~20,000 IOPS 671: 668: 665: 662: 661: 656: 653: 650: 647: 644: 641: 640: 636: 633: 630: 628: 625: 622: 618: 615: 614: 597: 588: 578: 574: 568: 566: 562: 557:This section 555: 546: 545: 533: 530: 527: 524: 521: 518: 515: 512: 511: 507: 504: 501: 498: 495: 492: 489: 486: 485: 482:58.1 – 107.2 481: 478: 475: 472: 469: 466: 463: 460: 459: 456:58.1 – 107.2 455: 452: 449: 446: 443: 440: 437: 434: 433: 430:73.5 – 127.5 429: 426: 423: 420: 417: 414: 411: 408: 407: 404:91.5 – 126.3 403: 400: 397: 394: 391: 388: 385: 382: 381: 377: 374: 372: 363: 357: 349: 346: 333: 330: 326: 322: 317: 315: 311: 306: 304: 300: 296: 292: 288: 284: 277: 275: 254: 246: 232: 230: 226: 216: 212: 208: 204: 200: 196: 192: 188: 184: 180: 172: 169: 166: 164: 160: 151: 142: 139: 135: 131: 125: 116: 114: 110: 106: 102: 99:devices like 98: 94: 90: 87:, pronounced 86: 82: 72: 69: 61: 51: 47: 41: 40: 36: 30: 21: 20: 2353: 2186:SATA Express 1912:Trim command 1902:Secure erase 1897:Read disturb 1871: 1852:Flash memory 1782:The Register 1780: 1771: 1760:. 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Retrieved 807:SSD 960 PRO 771:SSD 960 EVO 689:SSD 850 PRO 666:Phoenix Pro 651:~5,000 IOPS 631:~8,600 IOPS 582: 571:Please help 559:may contain 558: 508:43.4 – 97.8 505:24.3 – 32.1 479:40.9 – 53.1 453:40.9 – 53.1 427:49.7 – 63.1 401:58.9 – 68.9 395:11.2 – 12.3 370: 361: 355: 344: 318: 307: 279: 234: 222: 177:Description 174:Measurement 167: 156: 126: 122: 111:(SAN). Like 93:input/output 88: 84: 80: 79: 64: 55: 33: 2243:Thunderbolt 2235:PCI Express 2180:PCI Express 2174:NVM Express 2089:Independent 1983:Controllers 1882:Memory wear 870:Flash/Disk 643:Intel X25-E 421:9.7 – 10.8 259:BytesPerSec 182:Total IOPS 107:(SSD), and 58:August 2016 2371:Categories 2248:USB Type-C 2191:Serial ATA 2155:Interfaces 2121:PMC-Sierra 1837:Encryption 1762:2016-03-23 1741:2014-02-07 1721:2012-09-25 1691:2013-11-14 1669:2015-12-19 1577:2013-05-13 1537:2009-05-22 1492:2009-05-22 1450:2013-05-13 1383:2013-05-13 1359:2010-05-19 1355:. May 2010 1324:2009-03-18 1293:2013-05-13 1268:2010-07-20 1233:2011-08-02 1212:2019-04-01 1188:2024-06-24 1164:2011-06-30 1143:2010-04-01 1122:2010-05-31 1101:2010-05-31 1024:2013-05-13 999:2015-05-05 974:2013-08-15 953:2011-07-03 928:References 608:Interface 565:irrelevant 499:4.4 – 4.9 473:8.3 – 9.2 470:130 – 143 467:142 - 151 447:8.3 – 9.2 444:130 – 143 441:142 - 151 418:151 - 169 415:163 - 178 398:115 – 135 392:175 - 192 389:188 - 203 130:sequential 119:Background 113:benchmarks 35:neutrality 2059:SandForce 2008:Fusion-io 1044:CiteSeerX 858:MLC Flash 839:Kaminario 679:SandForce 561:excessive 476:80 – 104 450:80 – 104 424:97 – 123 329:SandForce 285:(TCQ) or 247:× 225:seek time 46:talk page 2355:Category 2326:T10/SCSI 2106:Maxiotek 2066:SK Hynix 2036:Indilinx 1948:SK Hynix 1546:cite web 1501:cite web 1333:cite web 911:See also 888:DSSD D5 750:DDRdrive 717:tachIOn 585:May 2018 567:examples 502:47 – 63 496:69 - 76 493:73 - 79 336:Examples 91:) is an 39:disputed 2336:T13/ATA 2306:SATA-IO 2111:Marvell 2070:Bought 2054:Seagate 2049:Samsung 2003:SanDisk 1991:Captive 1952:Bought 1943:Samsung 1857:SLC/MLC 1118:. Intel 805:Samsung 769:Samsung 687:Samsung 664:G.Skill 599:Device 516:/ 5400 490:/ 7200 321:Iometer 303:Seagate 138:threads 103:(HDD), 89:eye-ops 2331:T11/FC 2301:USB-IF 2281:INCITS 2193:(SATA) 2182:(PCIe) 2176:(NVMe) 2164:(AHCI) 2116:Phison 2044:Micron 2025:Kioxia 1967:Kioxia 1938:Micron 1639:9 June 1608:7 June 1410:7 June 1046:  891:Flash 865:NetApp 645:(SLC) 611:Notes 464:/ 10K 438:/ 10K 412:/ 15K 386:/ 15K 134:random 2265:EDSFF 2225:mSATA 2205:(USB) 2199:(SAS) 2072:Intel 1954:Intel 1758:. EMC 1531:(PDF) 1524:(PDF) 1486:(PDF) 1479:(PDF) 1318:(PDF) 1311:(PDF) 1262:(PDF) 1255:Intel 1251:(PDF) 1095:(PDF) 1088:(PDF) 993:(PDF) 761:PCIe 742:PCIe 726:PCIe 605:IOPS 602:Type 531:22.6 369:IOPS 360:IOPS 354:IOPS 2321:SSSI 2316:SNIA 2291:ONFI 2170:(FC) 2101:Goke 2080:FADU 2018:sTec 2013:HGST 1973:YMTC 1965:and 1877:MB/s 1872:IOPS 1641:2017 1610:2017 1552:link 1507:link 1412:2017 1339:link 1071:help 844:SSD 819:NVMe 810:SSD 783:NVMe 774:SSD 755:SSD 736:SSD 720:SSD 692:SSD 669:SSD 648:SSD 525:3.5 514:SATA 488:SATA 299:SCSI 291:SATA 274:MB/s 243:IOPS 132:and 85:IOPS 32:The 2260:U.3 2255:U.2 2230:M.2 2126:SMI 2030:OCZ 1842:ECC 1040:IBM 886:EMC 841:K2 823:M.2 787:M.2 752:X1 627:SSD 621:MLC 563:or 528:44 522:55 519:57 462:SAS 384:SAS 325:OCZ 2373:: 1779:. 1709:. 1643:. 1630:. 1618:^ 1601:. 1586:^ 1548:}} 1544:{{ 1503:}} 1499:{{ 1428:. 1403:. 1392:^ 1368:^ 1335:}} 1331:{{ 1286:. 1253:. 1205:. 1181:. 1062:: 1060:}} 1056:{{ 1042:. 935:^ 901:. 853:FC 623:) 436:FC 410:FC 276:) 163:kB 1969:) 1815:e 1808:t 1801:v 1785:. 1765:. 1744:. 1724:. 1694:. 1672:. 1612:. 1580:. 1554:) 1540:. 1509:) 1495:. 1453:. 1432:. 1414:. 1386:. 1362:. 1341:) 1327:. 1296:. 1271:. 1236:. 1215:. 1191:. 1167:. 1146:. 1125:. 1104:. 1073:) 1069:( 1052:. 1027:. 1002:. 977:. 956:. 619:( 587:) 583:( 579:. 569:. 255:= 83:( 71:) 65:( 60:) 56:( 52:. 42:.

Index

neutrality
disputed
talk page
conditions to do so are met
Learn how and when to remove this message
input/output
computer storage
hard disk drives
solid state drives
storage area networks
benchmarks
sequential
random
threads

contiguous manner
kB
seek time
Megabytes per second
MB/s
Tagged Command Queuing
Native Command Queuing
SATA
Western Digital Raptor
SCSI
Seagate
NAND flash-based
garbage collection
Iometer
OCZ

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