What is raid storage_ a simple guide to understanding it
RAID or less commonly known as Redundant Array of Independent Disks is a data storage virtualization combining several physical disks drives into a single unit for various reasons. Database entity These include performance optimization, data redundancy or both.
In this set up, data is distributed across the disk drives. Database developer Depending on the type of performance or redundancy desired, there are several types of RAID levels named RAID 0, RAID 1 etc. Data recovery plan In this short guide we will be looking into three common levels.
Data recovery kansas city RAID Levels Explained
RAID 0: First off we look this level and as the name implies it bring zero to the table in terms of reliability. N k database If you have two disks all this does is it increases your usage capacity to the combined total available in both disks. Data recovery 2016 However it strips the data across these drives. 510 k database fda This gives you greater read and write performance from the drives.
The cons here is that if one of your drives goes south then you lose all the data on both drives not just the bad one because the data was stripped across both drives. Database programmer Therefore when you use this configuration you had better take plenty of backups.
So why would one want to ever use such as level of RAID? Well to take advantage of the performance of running multiple SSDs would be reason enough to go for it.
RAID 1: One the other hand, if performance is not such an issue but reliability is, then RAID 1 is for an option. Data recovery osx This configurations allows you to have the performance of half of your drives and the storage capacity of half of your drives as well. Database integrity It however increases the reliability in that it save the data redundantly on all the drives. Database backup If you lose one drive you still have access to all of your data.
RAID 10 – Nested (hybrid) RAID: This configuration combines the benefits of RAID 0 and RAID 1. Hollywood u database With this set up you get half the performance of all the drives and half the storage capacity of all the drives. Data recovery ipad You need a minimum of four disks for this set up to work.
Ideally you would perform a RAID 0 on the two initial disks and mirror (RAID 1) those to two other disks. Database vs server This set up allows for you to lose a maximum of two disks and still get all you data back. Database is in transition In the end you get your performance and reliability plus additional storage space out of this.
There are other RAID levels not mentioned here as they are no longer used or are more appropriate for more professional set ups therefore are beyond the scope of this guide. Data recovery ios With that said, RAID 2 and RAID 3 are no longer in use in modern systems. Database data types These two Levels are like RAID zero but strip at the bit level. Data recovery johannesburg RAID 4 is also not used but there is a propriety version in use. Iphone 5 data recovery software This one strips at block-level with dedicated parity.
RAID 5 is in use and requires minimum three drives to work and are susceptible to system failures. Database operations RAID 6 like RAID 5 does block-level striping and requires a minimum of four drives and can tolerate failure in two drives at most. Database index There far many more configuration beyond these but that’s all we have for now on RAID.