Habka kaydinta kombuyuutarku wuxuu had iyo jeer ahaa qaybta ugu gaabisa silsiladda. CPU - gaagu waxa uu leeyahay xusuusta kaydinta degdega ah, taas oo si tartiib tartiib ah ula falgasha (walina aad u dheeraysa!) RAM ka dibna waxaanu haynaa saxanka nidaamkaaga, kuwaas oo mar kale amarrada xajmigu gaabis ah.

RAID ama Redundant Array of Independent/Inexpensive Disks waa habka la isku daro saxanadaha badan si loo horumariyo waxqabadka, isku halaynta ama labadaba. Iyadoo SSDs ay si dhakhso ah ugala wareegayaan qalabka adag ee farsamada, tani waxay ina soo bandhigaysaa doorasho: HDD Raid Vs SSD Raid . Ma jiro wax guulaysta oo dhammaystiran halkan, markaa aynu si dhow u eegno tixgelinta.

Soo koobida Heerarka RAID^{(A Recap Of RAID Levels)}

Inkastoo aysan jirin halbeeg caalami ah oo loogu talagalay qaabeynta RAID , waxaa jira dhowr wax loogu yeero RAID "heerka" kuwaas oo noqday meel qurux badan. Markaan isbarbar dhigeyno tignoolajiyada HDD RAID ee ka dhanka ah tignoolajiyada SSD RAID , waxaa muhiim ah in dib loo soo koobo faa'iidooyinka, qasaarooyinka iyo tirada darawalada aad ugu baahan tahay nooc kasta oo ah dejinta RAID . Aynu si kooban ugu dul tagno:

RAID 0 wuxuu u baahan yahay laba saxan, ma bixiyo dib-u-celin laakiin xawaare badan iyo ganaax booska diskka
RAID 1 wuxuu u baahan yahay laba saxan, wuxuu bixiyaa dib-u-celin, laakiin kaliya guulaha xawaaraha yar iyo 50% ciqaabta booska diskka
RAID 10 wuxuu u baahan yahay afar saxan, wuxuu bixiyaa dib-u-celin, wuxuu bixiyaa akhrin degdeg ah, si fiican u qorista iyo wuxuu allabari 50% booska diskka.

Waxaa jira dabcan heerar kale oo kakan oo RAID ah (sida 1E, 5, 50, 6 & 60) laakiin saddexdan ayaa ah kuwa ugu badan ee isticmaalayaasha caadiga ah ay xiiseynayaan.

HDD RAID Vs Hal SSD^{(HDD RAID Vs a Single SSD)}

Waxaan qiyaasi karnaa sababta ugu badan ee qof uu uga yaaban karo RAID iyo sida ay ula xiriirto SSD^(SSDs) -yada ay ka timi isbarbardhiggan gaarka ah. Marka waxaan marka hore ka saari doonaa kan wadada.

Qalabka adag ee makaanikada ah ayaa aad u gaabis ah, sidaa darteed hal dariiqo oo caan ah oo lagu helo wax soo saar wanaagsan ayaa ah in la isku daro laba darawal oo isku mid ah qaabeynta RAID 0 . Xogtu waa "la fidiyey" labada darawalba waxayna u dhaqmaan sidii hal wadid oo adag, laakiin leh (aragti ahaan) laba jeer xawaaraha wareejinta. Mar haddii darawal kastaa uu leeyahay qayb gaar ah oo xogtaada ah, waxa aad had iyo jeer yeelan kartaa labada darawal oo wax ku kordhinaya hawlgal kasta.

Waxaa wax laga xumaado, marka ay timaado xawaaraha cayriin, hal a SSD waxaa mar kasta waxa ay ku guuleysan ka soo horjeeda weerar 0 Mudanayaasha ah drive adag. Xitaa, ugu qaalisan 10,000 ugu dhaqsiyaha badan RPM Sata III macaamiisha drive adag oo keliya dushiisa ka 200MB / s. In aragtida^{(In theory)} . Sidaas daraaddeed laba ka mid ah in RAID0 kaliya maamuli lahaa wax yar ka yar laba jeer in.

Ku dhawaad SATA III SSD waxay aad ugu dhowaan doontaa xadka isku xirka 600MB/s. Haddii aan ka hadlayno NVME SSD s anagoo adeegsanayna borotokoolka PCIe , markaa xawaaraha akhrinta caadiga ah wuxuu dhaafaa 2000MB/s.

Si kale haddii loo dhigo, haddii waxqabadka saafiga ah uu yahay waxa aad raadineyso, hal SSD ayaa had iyo jeer garaaci doonta labo ka mid ah darawallada farsamada. Xitaa haddii ay yihiin kuwa ugu dhaqsaha badan makaanikada adduunka.

Isla sidaas oo kale ayaa lagu kalsoonaan karaa iyo ilaalinta xogta. Haddii aad haysato RAID 10 oo leh afar darawal oo adag, wali waxaad helaysaa labanlaab xawaaraha wadista oo waxaad waayi kartaa darawalka adigoon lumin wax xog ah. Iyadoo ay taasi jirto, hal SSD ayaa weli noqon doona xal la isku halayn karo. SSD waxay leedahay tiro xadidan oo qoraal ah ka hor inta aysan dib u qori karin xogta jirta, laakiin waxaad weli akhrin kartaa dhammaan xogta ku jirta saxanka.

Guuldarrooyinka lama filaanka ah ee SSD waa wax aan caadi ahayn, laakiin had iyo jeer waxaad haysataa ikhtiyaarka ah inaad ku socodsiiso laba SSD gudaha RAID 1 . Ma jirto faa'iido xawli muhiim ah, laakiin hal darawal ayaa si buuxda u fashilmi kara iyada oo aan la lumin xogta. Kuma talineyno in aad lacag ku qarash gareyso RAID 1 SSD oo keliya amniga xogta. Aad bay u kharash badan tahay in si fudud loogu soo celiyo sawirkaaga wadida adag si loo helo wado la awoodi karo oo dibadda ah ama daruuraha, maadaama inta badan nidaamyada desktop-ka aanay ahayn hawl muhiim ah.

HDD RAID vs SSD RAID: Tixgelinta Guud^{(HDD RAID vs SSD RAID: General Considerations)}

Hadda oo aan wax ka qabannay hal dhacdo SSD , aan ka hadalno isbarbardhigga tooska ah ee RAID -to- RAID . Taasi waa, wadisyada farsamada ee RAID marka la barbar dhigo SSD^(SSDs) - yada RAID . Waxaa jira saddex arrimood oo muhiim ah in la tixgeliyo: waxqabadka, qiimaha iyo kalsoonida xogta. Aan mid walba si faahfaahsan u eegno.

Waxqabadka^{(Performance)}

Waxay u badan tahay inaadan la yaabin inaad maqasho in qaabaynta SSD RAID ay had iyo jeer garaaci doonto qalab kasta oo RAID wadida farsamaysan ee waxqabadka cayriinka ah. Su'aasha dhabta ah ayaa ah intee in le'eg ayaad ka heli doontaa socodsiinta SSDs ee RAID iyo haddii ay u qalanto. Tani waa su'aal adag.

Hal arrin ayaa ah hardware iyo software RAID . Xakamaynta qalabka RAID ee u go'an ayaa bixin doona waxqabad ka wanaagsan kan xalka software-ku-saleysan. Intaa waxa dheer, marka uu xawaaruhu kordho, qaybaha kale ee kombayutarkaagu waxa laga yaabaa inay noqdaan cunsur xadidaya ama “qoorta dhalada”.

Tusaale ahaan, isticmaalka maalinlaha ah waxaa jira farqi yar oo u dhexeeya SATA III SSD iyo M.2 NVMe PCIe drive. inkastoo kan dambe uu shan ama lix jeer ka dheereeyo. Ciyaaruhu^(Games) si xawli leh uguma shubmaan codsiyaduna maahan kuwo aad u degdeg badan. Culaysyada shaqada sida tafatirka fiidyaha ama codsiyada xirfadlayaasha ah ee ku lug leh falanqaynta xog-ururinta, dhanka kale, waxay cuni doontaa inta ugu badan ee bandwidth inta aad bixiso.

Tani waxay ka dhigan tahay in laba SSDs lagu dhejiyo RAID 0 waxay u badan tahay inaysan hagaajin doonin celceliska khibrada isticmaalaha iyo kharashka ayaa si fiican loogu isticmaali karaa meelo kale nidaamka.

Price!

In kasta oo SSD^(SSDs) -yadu ay qiimo badan hoos ugu dhaceen dhawrkii sano ee la soo dhaafay, haddana marar badan ayay ka qaalisan yihiin halkii gigabyteba marka loo eego darawallada farsamada. Dhab ahaantii, darawallada makaanikku waxay riixayeen awoodda wakhti dambe maadaama aysan ku tartami karin waxqabadka.

Tani waxay SSD^(SSDs) -yada ka dhigaysaa mid aan soo jiidasho lahayn sida kaydinta tirada badan. Dareewalada makaanikada ah ee ku jira qaabaynta RAID-da oo kaliya-ka-soo-noqosho ama aan badnayn iyo qaabaynta RAID -da ayaa wali aad u khusaysa kharashna ku leh isticmaalayaasha desktop-ka. Haddii aad ku maamusho guriga NAS (shabakadda kaydinta ku lifaaqan) ee qulqulka ama wadaagga faylka, waa doorashada ugu macquulsan.

Haddii aad si buuxda ugu baahan tahay xawaaraha laba SSDs ee RAID 0 ama aad leedahay hawl muhiim ah oo ka faa'iideysanaysa RAID 1 , waxaad eegaysaa labanlaab qiimaha ku socodsiinta hal darawal. Adiga kaliya ayaa go'aamin kara haddii 200% kharashka uu u qalmo faa'iidooyinka ikhtiyaarka midkood.

Kalsoonida & Adkeysiga^{(Reliability & Endurance)}

Adkeysiga SSD^{(SSD endurance)} waa wax aan horay uga soo qornay waana isbarbardhig adag oo lagu sameeyay darawallada farsamada. SSD^(SSDs) -yadu way gaboobaan marka wax badan loo qoro. Si kastaba ha ahaatee darawalada casriga ah, dulqaad qorista ayaa aad uga fog waxa isticmaalayaasha badankoodu u baahan doonaan.

Luminta xogta dhamaystiran xitaa marka SSD aan loo qori karin, waa wax aan suurtagal ahayn. Siyaabo badan ayay RAID u jirtaa sababtoo ah darawallada makaanikadu waxay u nugul yihiin inay fashilmaan marka hore. Madax ilaa madax, SSD^(SSDs) -yadu aad bay ugu kalsoon yihiin in aanay ka dhigin RAID soo noqnoqonaysa.

Jawaabo cad ma jiraan^{(No Clear Answers)}

Sida aad arki karto, ma jirto xaalad ay jawaabtu had iyo jeer noqon doonto HDD RAID ama SSD RAID (ama haddii kale). Waxay aad ugu xidhan tahay baahiyahaaga gaarka ah. Si kastaba ha ahaatee, waxaan bixin karnaa qaar ka mid ah tilmaamaha guud:

Isticmaalayaasha badankoodu kama faa'iidaysan doonaan hagaajinta xawaaraha SSD RAID .
HDD RAID ayaa wali ugu fiican kaydinta tirada badan.
SSD^(SSDs) -yadu waa la isku halayn karo oo ku filan inay RAID ka dhigaan mid macquul ah oo keliya isticmaalka muhiimka ah.

Iyada oo sawir cad oo ah halka hab kastaa u shaqeeyo, waa inaad haysataa fikrad aad u fiican oo ikhtiyaarka kuu ah midka ugu waxtarka badan iyo dhaqaalaha kuu ah.

HDD Raid Vs SSD Raid: The Major Differences You Should Know

The storage system of a computer has always been the slоwest component in the chain. Your CPU has fast cache memory, which interacts much slower (yet still fast!) with RAM and then we have your systems disks, which are again orders of magnitude slower.

RAID or Redundant Array of Independent/Inexpensive Disks is a method of combining multiple disks into one to improve performance, reliability or both. With SSDs quickly taking over from mechanical hard drives, this presents us with a choice: HDD Raid Vs SSD Raid. There’s no absolute winner here, so let’s take a close look at the considerations.

A Recap Of RAID Levels

While there is no universal standard for RAID configurations, there are several so-called RAID “levels” that have become pretty commonplace. When we’re comparing HDD RAID technology against SSD RAID technology, it’s important to recap the pros, cons and number of drives you need for each type of RAID setup. Let’s go over them in short order:

RAID 0 needs two disks, provides no redundancy but lots of speed and no disk space penalty
RAID 1 needs two disks, provides redundancy, but only small speed gains and a 50% disk space penalty
RAID 10 needs four disks, provides redundancy, provides fast reads, better write speeds and sacrifices 50% of disk space.

There are of course other more complex RAID levels (e.g. 1E, 5, 50, 6 & 60) but these three are the most common that typical users would be interested in.

HDD RAID Vs a Single SSD

We figure the most common reason someone might be wondering about RAID and how it relates to SSDs comes from this specific comparison. So we’ll get this one out of the way first.

Mechanical hard drives are pretty slow, so one popular way to get better throughput is by combining two identical drives into the RAID 0 configuration. The data is “striped” across both drives and they act as one hard drive, but with (theoretically) twice the transfer speed. Since each drive has a unique part of your data, you can always have both drives contributing to any operation.

Sadly, when it comes to raw speed, a single SSD is always going to win out against a RAID 0 hard drive setup. Even the fastest, most expensive 10,000 RPM SATA III consumer hard drive only tops out at 200MB/s. In theory. So two of them in RAID0 would only manage a little under twice that.

Just about any SATA III SSD will get very close to the limit of the connection at 600MB/s. If we’re talking NVME SSDs using the PCIe protocol, then typical read speeds exceed 2000MB/s.

In other words, if pure performance is what you’re looking for, a single SSD will always beat a pair of mechanical drives. Even if they are the fastest mechanical drives in the world.

The same goes for reliability and data protection. If you have a RAID 10 setup with four hard drives, you still get double the drive speed and you can lose a drive without losing any data. Despite this, a single SSD will still be a more reliable solution. SSD have a limited number of writes before they can no longer overwrite existing data, but you can still read all the data on the disk.

Spontaneous failure of an SSD is incredibly uncommon, but you always have the option of running two SSD in RAID 1. There’s no significant speed benefit, but one drive can fail completely without data loss. We wouldn’t recommend spending money on a RAID 1 SSD setup purely for data safety. It’s far more cost-effective to simply back up your hard drive image to an affordable external drive or the cloud, since most desktop systems are not mission critical.

HDD RAID vs SSD RAID: General Considerations

Now that we’ve dealt with the single SSD scenario, let’s talk about direct RAID-to-RAID comparisons. That is, mechanical drives in RAID compared to SSDs in RAID. There are three main aspects to consider: performance, price and data reliability. Let’s look at each one in more detail.

Performance

You will probably be unsurprised to hear that an SSD RAID configuration will always beat any mechanical drive RAID setup in raw performance. The real question is how much performance you’ll gain from running SSDs in RAID and whether it’s worth it. This is a complicated question.

One factor is hardware versus software RAID. A dedicated hardware RAID controller will provide better performance than a software-based solution. Additionally, as speed increases, other components in your computer might become a limiting factor or “bottleneck”.

For example, in day-to-day use there’s little difference between a SATA III SSD and an M.2 NVMe PCIe drive. despite the latter being five or six times faster. Games don’t load noticeably faster and applications aren’t necessarily more snappy. Workloads such as video editing or professional applications involving massive dataset analysis, on the other hand, will eat as much bandwidth as you have to offer.

This means that putting two SSDs in RAID 0 probably won’t improve the average user experience and the cost could be better spent elsewhere in the system

Price!

Although SSDs have come down a lot in price over the last few years, they are still many times more expensive on a per-gigabyte basis than mechanical drives. In fact, mechanical drives have been pushing capacity of late since they can’t compete on performance.

This makes SSDs unattractive as redundant mass storage. Mechanical drives in purely-redundant or redundant and performance RAID configurations are still very relevant and cost effective for desktop users. If you run a home NAS (network attached storage) system for streaming or file sharing, it’s the most practical choice.

If you absolutely need the speed of two SSDs in RAID 0 or have a mission critical drive that benefits from RAID 1, you’re looking at twice the price of running a single drive. Only you can decide if 200% of the cost is worth the advantages of either option.

Reliability & Endurance

SSD endurance is something we’ve written about before and it’s a complex comparison with mechanical drives. SSDs wear out when they’ve been written to too much. However for modern drives, write endurance is far beyond what most users will ever need.

A complete loss of data even when an SSD cannot be written to, is very unlikely. In many ways RAID exists because mechanical drives are prone to failure in the first place. Head to head, SSDs are so much more reliable that they don’t make redundant RAID compelling.

No Clear Answers

As you can see, there is no situation where the answer will always be HDD RAID or SSD RAID (or otherwise). It’s very dependent on your specific needs. Nonetheless, we can provide some general guidelines:

Most users won’t benefit from SSD RAID speed improvements.
HDD RAID is still best for mass storage.
SSDs are reliable enough to make RAID sensible only for mission-critical uses.

With a clear picture of where each approach works best, you should have a much better idea which option makes the most functional and economic sense for you.

Martin Gomez

About the author

Waxaan ahay barnaamij kombuyuutar oo ku takhasusay horumarinta software-ka MacOS. Waxaan u adeegsadaa xirfadahayga si aan u qoro faallooyin xirfadeed oo aan ku siiyo talooyin ku saabsan sida loo horumariyo xirfadahaaga barnaamij ee Mac-ka. Waxa kale oo aan haystaa shabakad bixisa tifaftiran, tilmaamo tallaabo-tallaabo ah oo lagu abuurayo degel guul leh.

HDD Raid Vs SSD Raid: Farqiga ugu waaweyn ee ay tahay inaad ogaato

Soo koobida Heerarka RAID^{(A Recap Of RAID Levels)}

HDD RAID Vs Hal SSD^{(HDD RAID Vs a Single SSD)}