Take some notes on how long things take in software, fake raid, etc. Back when all of our server storage was on scsi disks, i used to be pretty particular about using good. I wanted to raid 1 the other two hard drives, but couldnt since i dont have hardware raid. Raid 10 consists of a minimum for four drives and has all the advantages of raid 0 and raid 1 albeit at a slightly higher cost. Its lone advantage over pure software raid is the ability to present a single device for bios booting. Creating a software raid array in operating system software is the easiest way to go. Software raid handles raid commands at the kernel level. I have found some pages regarding recovery data from raid 0 but i would appreciate any helpideasinput. There are very few motherboards with decent raid controllers builtin, though. Ive actually had up to 3 hd movies streaming off the array simultaneously with no issues and not even putting a dent in what the setup can do. I have some cheap drives laying around and just thought buying a raid card instead of a one large ssd would be the best way to go money wise. Raid 1 is good because the failure of any one drive just means the array is offline for longer while it rebuilds, but can still be recovered and that the read performance is as good as raid 0. Your best bet is to buy a decent addon raid card, or just use software raid.
Fake raid rarely supports any raid levels other than 0 or 1. True hardware raid encapsulates the disks and you will never be exposed directly to them once they are in a raid array and generally not even at other. Intel raid on your motherboard, is something people in the linux world refer to as fake raid and what is does is that a raid bios on your motherboard handles raid commands using the cpu to issue those commands rather then a dedicated raid controller, so under heavy readwrite situations, disk io will use more cpu resources than a real. I was wanting a real raid card, not the fake raid cards i have been reading about. Fakeraid is an odd animal that is truly raid, but is software raid.
Nov 04, 2015 hi, i see you are running raid 0 using 2 ssd drives. Microsoft windows supports raid 0, raid 1, and raid 5 using various software implementations. Feb 16, 2017 for raid 0 and raid 1, especially using a south bridge pch implementation, fake raid can have solid performance due to high bandwidth, low latency interfaces to the cpu. Despite the terminology, fake raid via dmraid is a robust software raid implementation that offers a solid system to mirror or stripe data across multiple disks with negligible overhead for any modern system. Dual booting with fake raid 0 intel rst ask ubuntu. Transferring files from a wd black 2tb to the raid 1 array is going at an appallingly slow rate of around 60mbs. Jul 03, 20 i have esxi running from the 1st hd on a machine. This is hardware raid and, honestly, im guessing it is slower than software raid if really. Fakeraidhowto community help wiki ubuntu documentation. For giggles, i used the fake raid software to put those two hard drives in a raid 1 array, but esxi 5.
You will have to specify the device name you wish to create devmd0 in our case, the raid level, and the number of devices. Sep 27, 2017 this firmwarebased raid also known as fake raid is an attractive option because it permits functionality such as disk mirroring without further monetary investment. With the advent of terabyte disk drives, fakeraid is becoming a popular option for entrylevel small business servers to simply mirror 2 1. How to clone raid array with easeus raid cloning software.
With raid 0 being useless for data security and raid 5 being unavailable, creating a software raid 1 in windows 7 is the only viable option. Raid levels greater than raid 0 provide protection against unrecoverable sector read errors, as well as against failures of whole physical drives. This allows linux to use various firmware or driverbased raid. Raid 10 has the performance characteristics of a raid 0 configuration, but instead on relying on single disks for striping, a mirrored array is. Software and fake raid use the cpu in lieu of a dedicated raid chip.
Windows 8 comes with everything you need to use software raid, while the linux package mdadm is listed in most standard repositories. Hardware raid controllers appear in this list, but fakeraid. Should i just give up on the fake or software raid, use sda for ubuntu boot and root and then sdb to install games or whatnot on. If a hardware raid controller is not capable of nesting linear jbod with raid n. Itd be nice if all this bios raid software raid worked right now and saw one drive instead of two. An introduction to raid terminology and concepts an introduction to raid terminology and concepts introduction. It also immediately recognized that the raid 1 array was running in degraded mode. To test if the performance goes up moving to mdadm using a proper hostbus adapter ahci capable card, you should just try that out. Oct 26, 2017 this gives the appearance of a hardware raid, because the raid configuration is done using a bios setup screen, and the operating system can be booted from the raid. Two caveats here are that most fake raid solutions, are limited to at most raid 0, raid 1, raid 10, raid 5, and raid 50. This article explains how to createmanage a software raid array using mdadm. Hardware raid is the more popular type, at least in terms of mindshare, with hardware raid controllers being nearly ubiquitous in pc platform servers. How i learned to stop worrying and love software raid. There is a third option called hardwareassisted software raid which is really just fake raid.
Besides its own formats for raid volumes metadata, linux software raid also supports external metadata formats, since version 2. When i bought my motherboard, the asrock conroexfireesata2, one of the big selling points was an on board raid, however some research revealed that rather than being a true hardware raid controller, this was in fact more than likely what is know as fake raid. Fake raid rarely supports hot spares or hot swappable drives. Not all fake raids are labelled with one of those, but itll catch probably 90% of them. Hardware is when you have a dedicated raid card that does all the work, leaving no work for the cpu, therefore yielding the best performance. Raid redundant array of independent disks a disk or solid state drive ssd subsystem that increases performance or provides fault tolerance or both. Hardwareassisted software raid fake raid a third type of raid called hardwareassisted software raid, firmware raid, or fake raid, is also available. How to dual boot windows and linux on a fake raid array. That said, linux software raid is more robust and better supported and thus.
I was actually going to buy a raid controller similar to this click here. That basically means that i use a fake raid hardware controller or a. Most onboard raid controllers which tend to only support raid 0 and raid 1 are infact fake raid controllers, at least this is how they are commonly referred to in geeky forums. Ive installed mdadm and run mdadm assemble scan and i get error. Jun, 2016 many hypervisors, including vmware, do not offer software raid. Raid 1 degraded due to failed disk, but rst wont allow. An introduction to raid terminology and concepts hostway. This is hardware raid and, honestly, im guessing it is slower than software raid if really tested, it lack the horsepower to anything much. Dec, 2005 itd be nice if all this bios raid software raid worked right now and saw one drive instead of two.
Most onboard raid controllers which tend to only support raid0 and raid1 are infact fakeraid controllers, at least this is how they are commonly referred to in geeky forums. Select the raid type under resiliency by selecting the drop down menu. This download record provides intel raid web console 3 version 7. Fake raid is nothing more than a software raid done via a proprietary binary driverblob. I am going to get another samsung 830 and want to raid 0 it with the current drive. By definition, fake raid has no inherent benefits over honest software raid, they share all hardware and the os people have better watch over the implementations. I really do not want to upgrade my mb, just want to put a raid controller card in right now. Configuring a raid device is straight forward using mdadm. Jun, 2012 generally speaking, software, fake, and hardware raid all support your normal raid tasks, such as keeping a raid in sync, rebuilding after a drive fails, checking drive health, etc. Hasr uses a type of firmware on the controller or card within the motherboard to manage raid, yet uses the cpu to handle most of the processing. I want to install ubunt tried other flavours of linux but no luck too and ubunt doesnt see my fake raid. This was in contrast to the previous concept of highly reliable mainframe disk drives referred to as. Hardware raid is faster, but its also more expensive due to the need for specialized hardware. They are infact just bios implementations of software raid, you see your operating system still needs drivers to.
Mar 16, 2017 software and fake raid use the cpu in lieu of a dedicated raid chip. Mar 26, 2015 creating a software raid 0 array on windows is really easy, and relatively painless. By continuing to browse this site, you agree to this use. Storage is an important consideration when setting up a server. Many hypervisors, including vmware, do not offer software raid. The thing is, microsoft doesnt call it raid in windows 8, opting for storage spaces and storage. How to create a software raid 1 in windows 7 as we mentioned earlier, on a level 1 raid two disks have the exact copy of.
The vmware firmware does not have fake raid software in there, so as a result it is not possible to imitate it like that. Logical disk manager, introduced with windows 2000, allows for the creation of raid 0, raid 1, and raid 5 volumes by using dynamic disks, but this was limited only to professional and server editions of windows until the release of windows 8. This site uses cookies for analytics, personalized content and ads. Unfortunately, i have a very, very strong suspicion that this is a fake raid card as it is not from any of the main manufacturers like lsi or 3ware.
The real differences come down to reliability and performance and what is handling the raid commands. Raid cloning software easeus todo backup, filebyfile, and sectorbysector disk cloning, both windows application and winpe bootable disk support raid array. In the past, raid was also accomplished by software only but was much slower. I have a zfs raid 10 software raid as my primary storage setup and the read speeds i get are more than enough to saturate my gigabit ethernet. I manually created this file by executing sudo grubsetdefault 0 from. If any other system, or even the windows system, ever sees through the raid and sees the independent drives that should be in the raid array, then you had software raid and not hardware raid. They are infact just bios implementations of software raid, you see your operating system still needs drivers to assemble the array. This allows linux to use various firmware or driverbased raid volumes, also known as fake raid. Raid is a data storage virtualization technology that combines multiple physical disk drive. Thats a fake raid setup, iow the raid software is in the firmware and handled by the cpu instead of by special raid hardware.
Any cacheless onboard raid controller is a near useless fake raid, made gluing together a satasas controller and said opaque driver. Amd hardware raid chipset that could do raid 0 and 1 and stands out as. Clone raid disk with raid cloning software easeus todo. Mount raid arrays and dynamic disks created with all current intel, nvidia or via chipsets on any other chipset and on all versions of windows with raid to raid software. Since it is connected to the control card, it has maximum mobility that is, you can transfer. I dont have this hardware available, but i can give you some general advice against using fakeraid in favour of software raid software raid is totally independent on the controller youre using. How to set up software raid 0 for windows and linux pc gamer. This firmwarebased raid also known as fake raid is an attractive option because it permits functionality such as disk mirroring without further monetary investment. Recover data from raid 0 fake raid from win xp there are a lot of documents and pictures installed and no backup ever done. Supports 12gbs and earlier intel raid controllers using mr software stack.
You just need to select the source disk and then choose the target disk. Raid redundant array of inexpensive disks or drives, or redundant array of independent disks is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of data redundancy, performance improvement, or both. Troubleshooting ssd raid0 performance anandtech forums. Which pcie card sata iii 6gbs will provide the best speed and reliability. Typically, this is found in raid functionality within motherboards themselves or in inexpensive raid cards. Whilst the new code handling the raid io still runs in the kernel, devicemapper is generally.
Differences between hardware raid, hbas, and software raid. The standard slackware installation cds would not work because they didnt include the support for mirror or stripe sets or dmraid. This download provides intel raid web console 3 version 007. I selected the new disk and the option rom correctly marked the raid 1 array with status rebuild. Fakeraid article about fakeraid by the free dictionary. You need to turn off the bios raid and remove the raid metadata from the drives before using software raid. A message popped up in the option rom asking if i wanted to use the new 4tb disk to rebuild the degraded array. For raid 0 and raid 1, especially using a south bridge pch implementation, fakeraid can have solid performance due to high bandwidth, low latency interfaces to the cpu. Another advantage of fake raid is that many implementations can be used by multiple operating systems. This gives the appearance of a hardware raid, because the raid configuration is done using a bios setup screen, and the operating system can be booted from the raid. With the advent of terabyte disk drives, fakeraid is becoming a popular. It is easy to install and update and provides full capability on all or part of any drives available to the system. Hardware raid is the more popular type, at least in terms of mindshare, with. Im having an issue during instalation of a new fujitsu primergy tx140 s2.
Software raid software based raid is the most flexible form of raid. Software raid 1 in windows 7 for increased data security. With modern 2tb and 3tb drives, double parity protection schemes such as raid 6 become both practical and arguably necessary over single parity raid 4 and raid 5 implementations. Creating a software raid 0 array on windows is really easy, and relatively painless. Today, most motherboards have builtin raid but not necessarily every raid configuration see below. Almost all of the important information that you and your users care about will at one point be written to a storage device to save for later retrieval. Another advantage of fakeraid is that many implementations can be used by multiple operating systems. To create a raid 0 array with these components, pass them in to the mdadm create command. Socalled fake raid is a name commonly applied to motherboard bios raid features that provide the bare minimum for raid functionality as. Simple pools the disks, twoway mirror and threeway mirror are similar to. I am using slackware with ich10 fake raid 0 on an asus p6t motherboard.