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RAID should not replace backups because:
1) It is very possible that both disks are damaged at the same moment, for example by fire, overvoltage from a lightning strike etc.
2) RAID does not protect from user accidentally erasing information.
And there are plenty of other reasons:
3) Usually RAID arrays are assembled from identical disks from the same manufacturing batch and they are burdened identically. This means that they are quite likely to fail around the same time.
4) RAID array can be corrupted by a single bug or failure in the RAID controller.
What else can I help you with?
Why does raid o not provide fault tolerance?
Different RAID systems have different effects on multiple hard drives. RAID 0 combines storage together. Say you have 2 250GB HDDs combined with RAID 0: that you gives you, essentially, 500GB of storage. The problem with RAID 0 is that if one of the drives were to fail, then the other is to fail too, because of the way RAID 0 works by distributing strands of data over both disks. RAID 0 is sometimes not considered to be a true RAID system because of the lack of fault tolerance. RAID 1 and 5 are more complex to describe, but they generally deal with the same thing: backups. Instead of combining storage, RAID 1 and 5 deal with clones of a particular drive to offer redundancy if one were to fail. Say you have 2 250GB HDDs under RAID 1, essentially giving you 250GB of storage. If one drive were to fail, then the other would serve as a replacement if such were to occur.
What does the term raid server recovery mean?
The term "RAID server recovery" means just that: recovery of the RAID server. A RAID server is a computer that runs RAID software to act as a secondary storage.
What additional hardware will be necessary to implement two identical hard drive?
Hardware will be RAID PCIe / PCIx RAID hardware controller but The hardware RAID is often the motherboard RAID controller or a separate RAID card.
What are Levels of RAID 0 1 5 and Which one is better and why?
RAID 0 is the best for speed because it uses "data stripping". That means if one drive fails, all you have left on the other one is useless bits and pieces of your files. That means one drive failing will corrupt ALL your data. If you choose RAID 0, you MUST back up your data at the very least every day. Preferably every hour. Automatic back ups is a good idea anyway. RAID 1 uses "mirroring". When you save a file, it gets saved to BOTH drives. Putting drives in RAID 1 does not make the system faster. That means if one drive fails, the other one will still contain all your data. The problem with RAID 1 is that you only get HALF of the space you bought. For example, if you put 2 drives with a 3TB capacity in RAID 0, you would have 6TB. 2 drives with 3TB each in RAID 1 would mean instead of 6TB, you would only have 3TB. The reason for that is because both drives contain the EXACT same data. RAID 5 is pretty good for speed and if 1 drive fails, you can just replace it and rebuild the RAID 5 array without losing any data. RAID 5: RAID 1: RAID 0: I would create a RAID 0 array to store your files and if you care about any of the files you would store on your computer, a RAID 1 or RAID 5 array (I would recommend RAID 5) to back up your data to. I hope this helps.
Which type of RAID uses a dedicated parity disk?
RAID 3
What are the three main reasons for using RAID?
What are the three main reasons for using RAID?
How do you setup a RAID network?
I'm not really sure what you really mean. You can set up a RAID array, but not a network that only consists of RAID. However, you can set a cluster NAS server which can utilize RAID arrays. However, RAID is never a substitute for backups, as with RAID arrays each storage device you add creates an additional point of failure - and in cases like RAID level 0 (striping), you will lose everything if even one drive fails.
How do you replace Raid 1 drives with larger raid 1 drives?
It is relatively easy to replace Raid one drive with a larger Raid one drive. You must turn off your system, and take out the drive, and place the larger drive in its place. Next, you turn on the system, and install the larger drive.
Is fault-tolerant system used to implement system backups?
Fault Tolerant refers to systems capable of uptimes of 99.999% or higher. RAID disks, multi-pathing, RAIN Networking are some technologies in use in fault tolerant systems that can continue operation during a failure. System backups are NOT part of a fault tolerant plan per se but, are required in a fault tolerant system in case of a complete failure. System backups should always be kept outside of the fault tolerant environment.
How are raid levels determined?
Raid Levels are determined by MTTF/number. To determine the raid levels one should reference the standard raid levels and determine what raid level your data storage capacity needs.
What is the purpose of a Hot Spare in a RAID array?
Used to replace a failed drive in a redundant array.
Why does raid o not provide fault tolerance?
Different RAID systems have different effects on multiple hard drives. RAID 0 combines storage together. Say you have 2 250GB HDDs combined with RAID 0: that you gives you, essentially, 500GB of storage. The problem with RAID 0 is that if one of the drives were to fail, then the other is to fail too, because of the way RAID 0 works by distributing strands of data over both disks. RAID 0 is sometimes not considered to be a true RAID system because of the lack of fault tolerance. RAID 1 and 5 are more complex to describe, but they generally deal with the same thing: backups. Instead of combining storage, RAID 1 and 5 deal with clones of a particular drive to offer redundancy if one were to fail. Say you have 2 250GB HDDs under RAID 1, essentially giving you 250GB of storage. If one drive were to fail, then the other would serve as a replacement if such were to occur.
What is the best free RAID recovery software available?
Yes. ReClaiMe is a website that offers a free Raid Recovery software. Although this may be an advertisement or a website that will give one a virus, it does qualify for giving out free software. You just have to be careful
What is in raid that is maid in raid?
raid
What did the raid on harpers ferry convince southerners of?
Slavery should be abolished
Is Chuck Norris a raid boss in World of Warcraft?
No, Chuck Norris is no a raid boss in World of Warcraft. However, some people think he should be.
What warned people that the raid in the blitz was about to begin?
I should imagine the air raid wardens by sounding an air raid siren!
