310:
122:
396:
25:
169:
552:
536:
695:"Shucking" refers to the process of purchasing an external hard disk drive and removing the drive from its enclosure, in order for it to be used as an internal disk drive. This is performed because external drives are often cheaper than internal drives of the same capacity and model, and that external drives designed for continuous usage often contain hard drives designed for increased reliability.
544:
564:
706:
reduced its cost of acquiring hard drives by purchasing external hard drives and shucking them. According to
Backblaze Chief Executive Gleb Budman, the company purchased 1,838 external drives during this period. Describing the process as "drive farming", the company noted that it was much cheaper for
476:
This even smaller, 2.75-inch-wide (70 mm) form factor is widely used today in notebook computers and similar small-footprint devices. One commonplace feature for these drives is radically lower power consumption than is found in larger drives. This enables enclosure vendors to power the devices
495:
While they are less common now than they once were, it is also possible to purchase a drive chassis and mount that will convert a 3.5-inch hard drive into a removable hard disk that can be plugged into and removed from a mounting bracket permanently installed in a desktop PC case. The mounting
487:
A range of other form factors has emerged for mobile devices. While laptop hard drives are today generally of the 9.5 mm high variant of the "2.5-inch" drive form factor, older laptops and notebooks had hard drives that varied in height, which can make it difficult to find a well-fitting
488:
chassis. Laptop optical drives require "slim" 5.25-in enclosures, since they have approximately half the thickness of their desktop counterparts, and most models use a special 50-pin connector that differs from the 40-pin connectors used on desktop
148:
into a format usable by an external connection on the computer to which it is connected. In some cases, the conversion is as trivial as carrying a signal between different connector types. In others, it is complicated enough to require a separate
632:
connections are typically used to attach consumer class external hard drives to a computer. Unlike SCSI, eSATA, or SAS these require circuitry to convert the hard disk's native signal to the appropriate protocol.
447:
was with 3.25 in (82.6 mm) twice as high as the one commonly used today; in fact, the PC's drive size was called "5.25-inch full-height", and the size used in the PC AT and commonly used today is "5.25-inch
305:
can be placed and connected with the same type of adapters as a conventional motherboard and power supply would use. The exterior of the caddy typically has two female sockets, used for data transfer and power.
637:
and internal Serial ATA hard disks are frequently connected to such chassis because nearly all computers on the market today have USB or FireWire ports, and these chassis are inexpensive and easy to find.
321:
some larger caddies can support several devices at once and can feature either separate outputs to connect each device to a different computer, or a single output to connect both over the same data cable
464:
series in 1987, which included drives of this size for 90-mm ("3.5-inch") floppy disks. This form factor is today used by most desktop hard drives. They usually have 10 mounting holes with
American
358:
relatively high transfer speed; typically faster than other common portable media such as CDs, DVDs and USB flash drives, slower than drives connected using solely ATA, SCSI and SATA connectors
496:
bracket carries the data bus and power connections over a proprietary connector, and converts back into the drive's native data bus format and power connections inside the drive's chassis.
687:
to provide a networked file system. A newer technology NAS, has been applied to some disk enclosures, which allows network ability, direct connection (e.g., USB) and even RAID features.
435:), are designed to be mounted into a so-called "5.25-inch slot", which obtained its nickname because this slot size was initially used by drives for 5.25-inch-diameter (133 mm)
411:
RAID-enabled enclosures and iSCSI enclosures commonly hold multiple drives. High-end and server-oriented chassis are often built around 3.5-in drives in hot-swappable drive caddies.
663:
are all commonly used protocols that are used to allow an external hard drive to use a network to send data to a computer system. This type of external hard drive is also known as
512:(SAN) or be used to describe a chassis directly attached to one or more servers over an external bus. Like their conventional server brethren, these devices may include a
483:
Found in extremely compact devices, such as certain portable media players and smaller notebooks, these devices are not standardized like their 2.5 inch cousins.
248:
Recovering the data from a damaged computer's hard drive, particularly when it does not share the same interface with the computer used to perform the recovery.
951:
844:
819:
508:
the term refers to a larger physical chassis. The term can be used both in reference to network-attached storage (NAS) and components of a
900:
1025:
181:
977:
294:
computers. Pre-built external drives are available through all major manufacturers of hard drives, as well as several third parties.
559:
of an enclosure controls the data transfer, generic mass storage device drivers are readily available on most operating systems
925:
89:
707:
them to purchase 3 TB external drives and removing them from their cases manually, than it is to purchase internal drives.
61:
1109:
1050:
324:
some caddies do not require an external power supply, and instead obtain power from the device to which they are connected
793:
68:
1127:
108:
609:
are extremely similar to the internal protocols, but are often expanded to carry power (such as eSATAp and the SCSI
869:
741:
42:
75:
680:
656:
46:
955:
952:"Review: Three One-Touch Backup Drives — Desktop Pipeline | Review: Three One-Touch Backup Drives"
848:
823:
57:
610:
203:
Adding RAID capabilities to computers that lack RAID controllers or adequate space for additional drives.
617:
with external port may be necessary to connect a drive, if a computer lacks an available external port.
172:
An external hard drive enclosure that uses a 2.5-in drive and a USB connection for power and transfer
736:
664:
647:
224:
144:
Drive enclosures provide power to the drives therein and convert the data sent across their native
220:
Adding an easily removable backup source with a separate power supply from the connected computer.
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751:
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465:
35:
904:
193:
556:
605:, without the need for any intervening controller. External variants of these native drive
327:
some caddies have integrated fans with which to keep the drives within at a cool temperature
141:
while providing a mechanism to allow them to communicate to one or more separate computers.
82:
999:
699:
606:
586:
509:
1076:
820:"Connect a USB hard drive to the PS3 to backup content — Swapping the PS3 hard drive"
290:
are also fairly common, following a trend to not integrate floppy drives into compact and
8:
228:
197:
309:
505:
456:
This smaller, 4-inch-wide (100 mm) disk-drive form factor was introduced with the
271:
207:
160:, external DVD-ROM drives, and others consist of a storage device in a disk enclosure.
874:
762:
668:
138:
460:
series in 1984, and later adopted throughout the industry beginning widely with the
870:"The CalDigit S2VR Duo RAID Enclosure — The 130 MB/s RAID Box For Video Or Storage"
726:
121:
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interfaces can be used to directly connect the external hard drive to an internal
251:
Lower the cost of removable storage by reusing hardware designed for internal use.
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In the consumer market, commonly used configurations of drive enclosures utilize
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power; most variants require a supply, unlike CDs, DVDs and USB flash drives...
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474:(2.75 in × 3.945 in × 0.374 in = 69.85 mm × 100.2 mm × 9.5 mm)
331:
238:
from a disk drive from increasing the heat inside an operating computer case.
978:"ioSafe announces Solo, the external, submersible, fire-proof HDD enclosure"
375:
price-to-storage ratio; typically better than CDs, DVDs and USB flash drives
1132:
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242:
145:
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directly from the host device's USB or other external bus, in most cases.
436:
267:
1077:"Farming Hard Drives: How Backblaze Weathered the Thailand Drive Crisis"
1026:"How to Get Premium Hard Drives for Cheap by "Shucking" External Drives"
254:
In some instances, provides a hardened chassis to prevent wear and tear.
731:
454:(4 in × 5.75 in × 1 in = 101.6 mm × 146.05 mm × 25.4 mm)
432:
417:(5.75 in × 8 in × 1.63 in = 146.1 mm × 203 mm × 41.4 mm)
283:
214:
213:
Transferring data between non-networked computers, humorously known as
153:
to retransmit data over connector and signal of a different standard.
798:
703:
513:
440:
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Multiple connectors including external power on a 2.5 inch enclosure
395:
24:
926:"Vizo Saturno One Touch Backup Enclosure Review :: Page 1 / 6"
629:
461:
347:
279:
264:
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520:
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1051:"How startup Backblaze survived a $ 349 hard-drive price crisis"
551:
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301: – a sheath, typically plastic or metallic, within which a
746:
594:
523:, cooling systems, enclosure management devices, and redundant
444:
424:
291:
185:
901:"Sun Fire X4500 server crams 48 drives into 4U | Storage"
330:
caddies for all major standards exist, supporting for example
125:
A 3.5-inch USB/FireWire hard disk enclosure with cover removed
756:
684:
672:
652:
598:
400:
794:"TiVo filling up? DVR expanders provide more room to record"
543:
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size; typically larger than CDs, DVDs and USB flash drives
231:
to share data or provide a cheap off-site backup solution.
625:
366:
343:
275:
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Most desktop models of drives for optical 120-mm discs (
176:
Key benefits to using external disk enclosures include:
362:
313:
Simplified circuit diagrams of harddiskdrive enclosure.
698:
Following the hard disk drive shortages caused by the
822:. Vgstrategies.about.com. 2009-06-16. Archived from
567:
This 2.5 inch caddy uses a single connector mini USB
468:
threads: three on each side and four on the bottom.
180:Adding additional storage space and media types to
133:is a specialized casing designed to hold and power
49:. Unsourced material may be challenged and removed.
620:
613:) and to use a more durable physical connector. A
1119:
539:An eSATA and Mini USB hard disk enclosure board
894:
892:
847:. Virtual-Hideout. 2009-01-21. Archived from
1102:"Advantages Of A HDD Caddy For Your Laptop"
1023:
949:
889:
210:or workstation than their chassis can hold.
571:
1048:
845:"Kingwin Big Drive RAID Enclosure Review"
443:. (The original "5.25-inch slot" in the
109:Learn how and when to remove this message
1024:Fitzpatrick, Jason (11 September 2017).
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120:
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403:external hard drive in a disk enclosure
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1000:"External Disk Enclosures and Caddies"
747:SCSI Attached Fault-Tolerant Enclosure
690:
258:
1074:
1049:Shankland, Stephen (9 October 2012).
954:. Informationweek.com. Archived from
759:- Serial General Purpose Input/Output
791:
641:
47:adding citations to reliable sources
18:
297:These may also be referred to as a
13:
671:running operating systems such as
14:
1144:
997:
1112:from the original on 2021-07-26.
667:or NAS. Often, such drives are
206:Adding more drives to any given
23:
1068:
1042:
1017:
742:Network Direct Attached Storage
621:Direct attach serial interfaces
390:
361:storage; typically larger than
34:needs additional citations for
1100:Agrawal, Piyush (2021-07-23).
1075:Klein, Andy (9 October 2012).
991:
969:
943:
918:
862:
837:
812:
792:Baig, Edward C. (2008-08-06).
785:
530:
1:
928:. techPowerUp. Archived from
778:
286:enclosures. External 3.5-in
241:Simple and cheap approach to
188:computers, as well as sealed
950:O'Brien, Bill (2005-10-18).
899:Venezia, Paul (2007-06-07).
7:
976:Stevens, Tim (2009-01-13).
903:. InfoWorld. Archived from
710:
611:Single Connector Attachment
163:
156:Factory-assembled external
10:
1149:
645:
575:
227:-capable enclosure over a
1128:Computer storage devices
737:Network-attached storage
665:Network-attached storage
648:Network-attached storage
225:network-attached storage
768:USB Mass Storage Device
752:SCSI Enclosure Services
702:, data storage company
578:Direct Attached Storage
572:Native drive interfaces
194:digital video recorders
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500:Enterprise enclosures
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700:2011 Thailand floods
510:storage area network
43:improve this article
691:Hard drive shucking
317:Variants of caddy:
272:optical disc drives
259:Consumer enclosures
198:video game consoles
669:embedded computers
569:
561:
549:
541:
506:enterprise storage
415:"5.25-inch" drive:
405:
399:Factory-assembled
315:
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139:solid state drives
127:
16:Specialized casing
763:Solid-state drive
642:Network protocols
481:"1.8-inch" drive:
472:"2.5-inch" drive:
452:"3.5-inch" drive:
182:small form factor
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409:Multiple drives:
371:USB flash drives
190:embedded systems
158:hard disk drives
135:hard disk drives
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58:"Disk enclosure"
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773:USB flash drive
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679:that use their
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458:Apple Macintosh
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418:
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379:Disadvantages:
303:hard disk drive
261:
234:Preventing the
166:
151:embedded system
115:
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52:
50:
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28:
17:
12:
11:
5:
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1081:Backblaze Blog
1067:
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980:. Engadget.com
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875:Tom's Hardware
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646:Main article:
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576:Main article:
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525:power supplies
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448:half-height".)
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958:on 2008-05-13
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907:on 2008-10-08
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851:on 2009-01-23
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54:Find sources:
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32:This article
30:
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21:
20:
1114:</ref>
1105:
1084:. Retrieved
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960:. Retrieved
956:the original
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934:. Retrieved
930:the original
920:
909:. Retrieved
905:the original
880:. Retrieved
878:. 2006-10-30
873:
864:
853:. Retrieved
849:the original
839:
828:. Retrieved
824:the original
814:
803:. Retrieved
797:
787:
717:Computer bus
697:
694:
683:daemons and
651:
635:Parallel ATA
624:
615:host adapter
603:host adapter
581:
503:
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437:floppy disks
414:
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391:Form factors
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354:Advantages:
353:
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262:
243:hot swapping
175:
155:
143:
130:
128:
105:
96:
86:
79:
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41:Please help
36:verification
33:
1030:How-To Geek
531:Connections
518:temperature
466:6-32 UNC 2B
433:DVD burners
346:, SCSI and
342:drives and
268:hard drives
1122:Categories
1106:Mediagrass
1035:2020-04-10
984:2009-07-29
962:2009-07-29
936:2009-07-29
911:2009-07-29
882:2009-07-29
855:2009-07-29
830:2009-07-29
805:2009-07-29
779:References
732:Hard drive
284:Serial ATA
215:sneakernet
69:newspapers
799:USA Today
704:Backblaze
607:protocols
514:backplane
441:IBM PC AT
99:June 2017
1110:Archived
1086:13 April
1060:13 April
711:See also
630:FireWire
492:drives.
462:IBM PS/2
427:drives,
348:FireWire
280:FireWire
265:magnetic
223:Using a
192:such as
164:Benefits
146:data bus
1009:30 June
998:Maris.
677:VxWorks
521:sensors
439:in the
421:DVD-ROM
401:Buffalo
350:outputs
274:inside
229:network
83:scholar
1004:HDDMag
597:, and
595:eSATAp
445:IBM PC
425:CD-ROM
292:laptop
208:server
186:laptop
85:
78:
71:
64:
56:
757:SGPIO
685:SAMBA
673:Linux
659:, or
653:iSCSI
599:eSATA
299:caddy
282:, or
90:JSTOR
76:books
1088:2020
1062:2020
1055:CNET
1011:2017
661:CIFS
583:SCSI
555:The
369:and
367:DVDs
340:SATA
338:and
336:SCSI
236:heat
196:and
184:and
62:news
1133:USB
681:NFS
675:or
657:NFS
628:or
626:USB
587:SAS
557:PCB
504:In
490:ATA
431:or
423:or
363:CDs
344:USB
332:ATA
276:USB
270:or
137:or
45:by
1124::
1108:.
1104:.
1079:.
1053:.
1028:.
1002:.
891:^
872:.
796:.
655:,
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429:CD
365:,
334:,
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129:A
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112:)
106:(
101:)
97:(
87:·
80:·
73:·
66:·
39:.
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