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would trigger a reassignment of the LUN to the other controller, a so-called trespass. This had severe implications on IO performance, and on older models like the 4500 models, this could cause a controller to crash if the system was directly (loop) attached to multiple IO-heavy hosts. The second controller would then take over the load from the first one, crash due to the additional LUN trespasses. By this time, the first controller comes up and is missing a partner to sync to. At this point, some LUNs could end up with no controller responsible for them, so-called unassigned LUNs.
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State Flash drives offer a significant performance advantage over mechanical drives and provide a new storage tier which EMC calls Tier-0. The new version of the FLARE operating environment that ships with the CX4 series includes support for the 64-bit Intel Xeon CPUs in the
Storage Processors. The CX4 Series is also the first product to use the new PCI Express based SLIC I/O cards. The product-agnostic SLIC I/O cards provide more flexibility for future upgrades as new technologies become available, such as 8 GBit Fibre Channel and 10 GBit Ethernet/iSCSI.
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Major New
Features in the CX4 UltraFlex Series include support for solid state flash drives, 64-bit FLARE Operating Environment and PCI-Express based SLIC I/O cards. The CX4-480 and CX-960 support fibre channel solid state flash drives introduced by EMC for the Symmetrix DMX-4 in January 2008. Solid
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The CLARiiON was a dual controller active/passive array, meaning that it had a mirrored write cache, but only one controller was actively serving requests for any single LUN presented to initiators. This could cause issues with unsuspecting clients, one path would always appear dead. Accesses to it
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is a half-width 1U or 2U device known as an X-blade, two of which are mounted side by side in the storage processor enclosure. This provides a fully redundant active-active configuration, with both storage processors serving requests and each acting as failover for the other so that initiators see
515:
The operating environment, FLARE (Fibre Logic Array
Runtime Environment), resides on the first four disks of the first DAE (bus 0 enclosure 0), which is also supplied by the integrated UPS. In the event of power failure, this space is also used to store the contents of the write cache so that all
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offering to its systems competitors. While this somewhat lessened the advantages of Aviion in the marketplace, and was a source of internal corporate friction, it allowed the company to sell higher volumes and popularize the brand. The strategy paid dividends as the company was acquired by EMC in
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The
Clariion is built on an Intel platform and has quite unique software layer: it runs two operating environments in parallel. Windows XP Embedded or stripped-down version of Windows Server for management and maintenance tasks and proprietary UNIX-based FLARE as an actual "data mover". Embedded
459:
From there, the
Clariion range grew into a faster, more expandable midrange storage platform, culminating in the FC5700 under Data General. After EMC's acquisition of Data General, significant development of a new range of Clariion arrays took place, resulting in the FC4500 and FC4700. A special
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line of computer systems as the HADA (High
Availability Disk Array) and later the HADA II before being made available for broader open systems attachment and renamed CLARiiON in 1994. Realizing the enormous potential of storage arrays, Data General created a separate Clariion division and began
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Storage is fibre-attached, initiators may be fibre- or IP-attached, the architecture supports both on the same array depending on configuration. Storage is connected via back-end loops with up to 120 drives per loop, the drives are contained in Disk Array
Enclosures (DAEs) of 15 drives each.
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Within a couple of years, the first CX series of
Clariions (CX200, CX400 and CX600) was developed. Subsequent processor and bandwidth upgrades led to a new CX lineup (CX300, CX500, CX700) and a low end SATA based Clariion array, the AX100 (now updated to AX150). In 2003, Clariion became the
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connection between the FC interface and the storage processor allows transfer speeds of up to 4 Gbit/s, while iSCSI supports speeds of max. 1 Gbit/s. All current models support RAID 0, 1, 1/0, 3, 5, and 6; as with the CX series, groups with differing RAID levels can be created.
441:, guide rails for proper electrical contact, and a method to lock the drives in place once they were secured in the disk enclosure. Other notable features include industry's first dual active-controller design, mirrored write cache, full system redundancy and hot repair.
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disks (with "Expansion Pack"). The base version has only place for 12 disks. Similar to the AX150 it is available in iSCSI or Fibre
Channel configurations. Opposed to the AX150 the AX4 supports Fibre Channel transfer speeds of up to 4 Gbit/s.
1329:, DeYesso; Joseph P. (Walpole, MA), Solomon; Robert C. (Kensington, NH), Todd; Stephen J. (Shrewsbury, MA), Lippitt; Mark C. (Boulder, CO), "On-line module replacement in a multiple module data processing system", issued 1994-12-06
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Each CX4 array consists of dual redundant hot-swappable components including storage processors, mirrored cache and battery backup, as well as redundant power supplies. The CX4 series supports Fibre
Channel and iSCSI host connectivity.
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With the fourth generation UltraFlex series, I/O is provided through pluggable modules providing either IP or fibre connectivity, allowing additional back-end and front-end connections to be added over the life of the array.
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Models of the CX series come in two configurations: Fibre Channel (transfer speeds max. 2 Gbit/s) and iSCSI (max. 1 Gbit/s). The exception is the CX700, which is FC only. The names of the iSCSI models end with an
429:) convinced Data General to develop the array. West realized the potential for more advanced and openly compatible data-storage devices, as did competitors such as Digital Equipment Corporation with their
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Patented in 1994, the Clariion disk array had some interesting features that later became standard in the data-storage and computing industry. Features mentioned in the patent paperwork included optional
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Crashes were uncommon when the use of FC fabrics become common place, but the general issue of trespassing lived on until a certain firmware (FLARE) level with ALUA support was released, ca. 2008.
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series of unified storage disk arrays intended to replace both CLARiiON and Celerra products. Internally the VNX is labeled the CX5. In early 2012, both CLARiiON and Celerra were discontinued.
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The Clariion line was soon extended to contain SCSI disk arrays ranging from 7 to 30 slots. In 1997, Data General's Clariion division took the unusual step of adopting an emerging standard —
361:, it occupied the entry-level and mid-range of EMC's SAN disk array products. In 2011, EMC introduced the EMC VNX Series, designed to replace both the Clariion and Celerra products.
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The CX series supports both SATA and Fibre Channel disks. Supported RAID levels are 1/0, 0, 1, 3, 5, and 6; the disks can be configured into groups with different RAID levels.
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configurations), iSCSI is physically limited to max. 1 Gbit/s. The AX150 is available in four configurations which differ in connection and number of controllers.
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The CX4 UltraFlex series contains multiple models which differ in the maximum number of disks (SATA or Fibre Channel) and the number of iSCSI and FC connections. The
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The CX3 series originally consisted of CX3-20, CX3-40, and CX3-80 models. Later the series was refreshed to include the CX3-10 and the "i" and "f" identifiers.
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levels are RAID 5 (with min. 3 disks) and RAID 1/0 (min. 4 disks). The Fibre Channel connection supports transfer speeds of up to 2 Gbit/s (with both
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per second) Fibre Channel and PCI-Express technologies. Later in 2007, the line was expanded to include a new entry-level storage system, the CX3-10.
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front end bus connectivity. The fibre channel back end bus offered 4 Gbit/s of bandwidth with FC-SCSI disks or SATAII disks.
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Windows (in the fourth generation this is 64-bit Windows Storage Server, the third generation used 32-bit Windows XP). The
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Advanced functionality of the Clariion is licensed and enabled through software. This includes SAN replication,
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Management of the Clariion is usually through inbuilt Java-based management software called Navisphere.
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connection that doubled the performance of SCSI arrays at that time. It was also the first to use
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Currently, two models are available the AX4 and the AX150. The AX150 supports up to 12
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device is based on the same X-blade architecture as the CLARiiON storage processor.
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product and initially sold exclusively as an array with the company's
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In May 2006, EMC introduced the third generation of Clariion, named
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The Clariion disk array project started in the early 1990s when
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The AX4 is the successor of the AX150 and can support up to 60
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Most newer Clariion models up to the CX-4 run a version of
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model was the IP4700, offering IP-based access to storage.
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http://www.networkworld.com/archive/1992/92-07-20dg_s.html
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provides security for data in the event of power failure.
1269:"Top Ten Innovative Enterprise Storage Hardware Products"
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companies. CLARiiON was an early commercial example of a
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http://www.emc.com/about/news/press/2011/20110118-05.htm
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The AX series is considered the entry-level disk array.
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Two EMC Clariion AX4-5 with and without frontal plate
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1142:"EMC Discontinues Clariion, Celerra Storage Lines"
1305:"EMC squares up to storage costs and reputation"
1201:"EMC Clariion CX4 model 120 specification sheet"
516:writes are completed on restoration of power.
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382:The first CLARiiON was developed in 1992 by
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504:the array as active-passive. An integrated
53:Learn how and when to remove these messages
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230:Learn how and when to remove this message
212:Learn how and when to remove this message
150:Learn how and when to remove this message
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175:This article includes a list of general
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86:Please improve this article by adding
1345:EMC Operating Systems Reference Guide
7:
1285:. computerworld.com. 18 January 2011
1234:Hoover's Guide to Computer Companies
1403: (archived September 15, 2004)
1307:. computing.co.uk. 30 January 2003
597:disks with either 250, 500 or 750
181:it lacks sufficient corresponding
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880:Max. capacity (1 TB = 10 B)
797:Max. capacity (1 TB = 10 B)
456:level 5 on Fibre Channel drives.
34:This article has multiple issues.
1387:CX3 UltraScale series Data Sheet
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407:In 2011, EMC introduced the new
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42:or discuss these issues on the
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448:. The FC5000 array utilized a
386:Corporation, one of the first
1:
1393: (archived June 16, 2012)
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450:Fibre Channel Arbitrated Loop
88:secondary or tertiary sources
1179:"EMC's Flashy New Clariions"
468:-certified storage system.
295:; 30 years ago
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1976:The Talking Propellerheads
1407:DG HADA Patent Description
399:selling the product as an
1970:The Soul of a New Machine
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1206:. emc.com. Archived from
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357:manufactured and sold by
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196:more precise citations.
1997:Data General computers
75:relies excessively on
2007:Discontinued products
1524:Defunct or Acquired:
1327:US patent 5371743
1232:Hoover, Gary (1996).
990:Front-end iSCSI ports
651:# of supported disks
350:) is a discontinued
16:Storage array product
958:CX4 UltraFlex series
630:Serial Attached SCSI
2002:EMC storage servers
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1377:CX Series datasheet
1271:. 15 November 2008.
1236:. Hoover's Guides.
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1412:AX4 datasheet
1410:
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1181:. pcworld.com
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1148:on 2012-07-12
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1038:
1037:
1033:
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1027:
1024:
1021:
1018:
1015:
1012:
1009:
1008:
1005:Flash Drives
1004:
1002:Max. capacity
1001:
998:
996:Max. HA Hosts
995:
992:
989:
986:
983:
980:
979:
976:
972:
968:
965:
957:
950:
947:
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910:
907:
904:
903:
900:
896:
893:
890:
887:
884:
883:
879:
876:
873:
871:Max. FC hosts
870:
867:
866:
863:
857:
850:
847:
844:
841:
838:
837:
833:
830:
827:
824:
821:
820:
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807:
804:
801:
800:
796:
793:
790:
788:Max. FC hosts
787:
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778:
775:
771:
765:
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566:
554:
549:
547:
544:
538:Unique issues
537:
535:
533:
529:
524:
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507:
502:
493:
491:
489:
484:
482:
478:
474:
469:
467:
461:
457:
455:
451:
447:
446:Fibre Channel
442:
440:
434:
432:
428:
427:
422:
414:
412:
410:
405:
402:
397:
393:
389:
385:
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366:fibre channel
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336:
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275:(1994 - 1999)
274:
273:
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216:
213:
205:
202:February 2011
195:
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143:
140:February 2011
132:
129:
125:
122:
118:
115:
111:
108:
104:
101: –
100:
96:
95:Find sources:
89:
83:
82:
78:
73:This article
71:
67:
62:
61:
56:
54:
47:
46:
41:
40:
35:
30:
21:
20:
1968:
1937:Applications
1885:
1764:Data General
1672:RecoverPoint
1621:
1467:Roger Marino
1462:Richard Egan
1340:
1321:
1309:. Retrieved
1299:
1287:. Retrieved
1277:
1263:
1252:
1233:
1227:
1215:. Retrieved
1208:the original
1195:
1183:. Retrieved
1173:
1161:
1150:. Retrieved
1146:the original
1136:
973:
969:
961:
861:
776:
773:
769:
766:
763:
623:
609:. Supported
592:
589:
545:
541:
525:
521:
518:
514:
510:
497:
494:Architecture
485:
472:
470:
462:
458:
443:
439:hot swapping
435:
431:StorageWorks
424:
418:
406:
388:minicomputer
384:Data General
381:
374:
363:
347:
343:
342:
308:Discontinued
290:Release date
272:Data General
270:
263:
243:EMC Clariion
226:
208:
199:
180:
146:
137:
127:
120:
113:
106:
94:
74:
50:
43:
37:
36:Please help
33:
1637:Data Domain
1538:Data Domain
1518:VMware inc.
964:PCI Express
601:(1 GB = 10
501:form factor
337:EMC Celerra
316:Predecessor
194:introducing
1991:Categories
1600:PowerVault
1502:Paul Sagan
1165:EMC, 2011
1152:2012-01-23
1128:References
858:CX3 series
642:Connection
626:Serial ATA
595:Serial ATA
530:(QOS) and
355:disk array
177:references
110:newspapers
99:"Clariion"
77:references
39:improve it
1922:AOS/VS II
1865:Walkabout
1855:microNOVA
1812:Computers
1780:(founder)
1667:NetWorker
1652:Greenplum
1632:Symmetrix
1528:LenovoEMC
1511:Divisions
1489:Directors
1486:Corporate
760:CX series
707:AX150iSC
555:AX series
532:snapshots
433:product.
324:Successor
260:Developer
45:talk page
1899:Software
1886:Clariion
1789:Tom West
1622:Clariion
1554:Products
1455:Founders
1448:Dell EMC
1348:Archived
1311:24 March
1289:24 March
1217:24 March
1185:24 March
1097:CX4-960
1068:CX4-480
1039:CX4-240
1010:CX4-120
750:1 Gbit/s
733:4 Gbit/s
716:1 Gbit/s
699:1 Gbit/s
682:2 Gbit/s
673:AX150SC
665:2 Gbit/s
421:Tom West
348:CLARiiON
346:(styled
344:Clariion
1962:Related
1874:Servers
1836:MV/8000
1831:Eclipse
1710:ThinApp
1690:vSphere
1686:VMware
1677:ScaleIO
1618:Celerra
1609:VxBlock
1590:XtremIO
1561:Servers
1543:nLayers
1399:at the
1389:at the
1379:at the
1369:at the
1118:1899 TB
951:480 TB
939:CX3-80
934:240 TB
922:CX3-40
917:120 TB
905:CX3-20
885:CX3-10
851:119 TB
848:4 TB(?)
741:AX4-5I
724:AX4-5F
690:AX150i
415:History
334:Related
328:EMC VNX
298: (
190:improve
124:scholar
1881:Aviion
1771:People
1705:Player
1700:Fusion
1657:Isilon
1605:Vblock
1595:Isilon
1333:
1240:
1089:939 TB
1060:231 TB
1031:120 TB
984:Memory
839:CX700
834:59 TB
822:CX500
811:365 GB
802:CX300
777:CX500i
747:1 or 2
730:1 or 2
656:AX150
396:Aviion
179:, but
126:
119:
112:
105:
97:
1928:DG/UX
1583:Atmos
1578:VPLEX
1568:Unity
1211:(PDF)
1204:(PDF)
1100:32 GB
1071:16 GB
981:Model
868:Model
785:Model
744:iSCSI
710:iSCSI
693:iSCSI
648:speed
639:Model
370:iSCSI
131:JSTOR
117:books
1913:RDOS
1826:Nova
1715:View
1695:ESXi
1682:ViPR
1662:Mozy
1607:and
1573:VMAX
1313:2011
1291:2011
1238:ISBN
1219:2011
1187:2011
1121:Yes
1092:Yes
1063:Yes
1042:8 GB
1034:Yes
1013:6 GB
948:1 TB
931:1 TB
914:1 TB
894:1 TB
831:4 TB
774:e.g.
617:and
611:RAID
481:bits
477:Gbit
466:NEBS
454:RAID
392:RAID
368:and
311:2011
300:1994
293:1994
280:Type
103:news
1949:CEO
1918:AOS
1847:PCs
1627:VNX
1533:VCE
1115:960
1112:512
1086:480
1083:256
1057:240
1054:256
1028:120
1025:128
945:480
942:256
928:240
925:128
911:120
908:128
897:60
845:240
842:256
828:120
825:128
814:27
719:12
702:12
685:12
668:12
628:or
607:NCQ
506:UPS
409:VNX
401:OEM
377:NAS
352:SAN
79:to
1993::
899:TB
891:60
888:64
816:TB
808:60
805:64
779:.
772:,
727:FC
676:FC
659:FC
619:SW
615:AL
599:GB
534:.
490:.
90:.
48:.
1924:)
1920:(
1756:e
1749:t
1742:v
1440:e
1433:t
1426:v
1315:.
1293:.
1246:.
1221:.
1189:.
1155:.
1109:8
1106:4
1103:8
1080:4
1077:4
1074:8
1051:4
1048:4
1045:4
1022:2
1019:4
1016:4
770:i
713:1
696:2
679:1
662:2
603:B
302:)
233:)
227:(
215:)
209:(
204:)
200:(
186:.
153:)
147:(
142:)
138:(
128:·
121:·
114:·
107:·
84:.
55:)
51:(
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