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Should I Use RAID 0 Or 5?


too often have i suffered crashes and lost data. So if the request comes for, say, blocks 1, 2, and 3, each block is read from its own disk. For SATA3, the 6 Gb/s indeed refers to the transfer speed. Using just the first 30 - 50% of each disk in a RAID volume will give you a volume which has the highest possible performance for any file on the volume. Source

But instead of striping data, the data stored on the drives in the array is duplicated across all the hard drives. Prepressure > Library > Technology > RAID RAID RAID is a technology that is used to increase the performance and/or reliability of data storage. Dawn Dubke says: January 26, 2015 at 6:23 pm Is it possible you can explain to me how to do the following or direct me to a tutorial? Link Gerald May 28, 2014, 1:12 pm RAID10 would give you the optimum data security and the best performance but at with only a 50% space utilisation.

Raid 5 Explained

RAID 5: 6-1=5TB RAID-DP: 6-2=4TB RAID 0+1: Not sure. RAID-systems can be used with a number of interfaces, including SCSI, IDE, SATA or FC (fiber channel.) There are systems that use SATA disks internally, but that have a FireWire or Tweakers.net.

RAID 0 (Striping) - RAID 0 is taking any number of disks and striping data across all of them. This means that reading large files from RAID 4 volumes only uses the data disks. Hardware RAID controllers cost more than pure software, but they also offer better performance, especially with RAID 5 and 6. Best Raid Configuration Because of this, read and write speeds are a fraction of what they would be if a single disk had to be accessed for the entire file.

mystery42Jun 9, 2010, 5:55 AM Best answer selected by Mystery42. Raid Performance Calculator RAID 1 (Mirroring) - RAID 1 is generally used with a pair of disks, though could be done with more, and would identically mirror/copy the data equally across all the drives Also the 6Gb per second Sata 3 transfer rate only applies to sequential reads, which are faster than random reads, particularly on rotating media. http://www.thegeekstuff.com/2010/08/raid-levels-tutorial Most will use a blend of the two, likely something around eighty percent read and twenty percent write.

RAID 1 - If you are looking to inexpensively gain additional data redundancy and/or read speeds. What Is Parity In Raid If RAID5 controller fails, you can still recover data from the array with RAID 5 recovery software. That means your effective capacity will be 6 TB. IBM server guide option raid configure with OS and raid only configuration.

Raid Performance Calculator

We highly recommend going with hardware RAID or the moterboards host RAID on a Windows based system. a fantastic read You can break the RAID down into its components and apply the formulae provided above. Raid 5 Explained I'm familiar with networking, I've just never bothered with RAID. Raid Performance Comparison Left/right and synchronous/asynchronous produce four possible combinations (see here for diagrams).

This means that those disks do not use a specific RAID level and acts as stand-alone disks. We recommend RAID 4 and RAID 5 volumes for video editing, animation studios, digital photography, prepress and graphic arts. Reply max says: August 21, 2007 at 8:57 pm you can get 1+0 on two disk using two partitions. With RAID6 two disks can die simultaneously. What Is Raid 6

So RAID 6 is more secure than RAID 5. Different RAID levels represent different configurations aimed at providing different balances between performance optimization and data protection. Typically, inexpensive add-in boards (think under $150) feature the same basic standalone controllers found on many motherboards, but some higher-end offerings like those from Areca, LSI, or 3COM offer true hardware With RAID 5, data and parity (which is additional data used for recovery) are striped across three or more disks.

if you combine two 500GB drives in RAID1, you'd only get 500GB of usable disk space. What Is Raid 10 For that reason, and because a stripe volume isn't protected against disk failure, RAID 0 is NOT a viable alternative for permanent storage How stripes work Stripe volumes, also known as You can use it for cache or other purposes where speed is important and reliability/data loss does not matter at all, but it should not be used for anything other than

Ramesh says: November 23, 2009 at 8:21 am Raid5 5disc failure how to recovery data pl explain Reply s says: January 27, 2010 at 10:59 pm In simplistic terms: 1.

RAID is also useful if you are having disk IO issues, where applications are waiting on the disk to perform tasks. Here are some short descriptions of each: •RAID 2 is similar to RAID 5, but instead of disk striping using parity, striping occurs at the bit-level. This comes out to be a six times write penalty, which is pretty dramatic. Raid Configuration Calculator The same disk requirements and costs as are outlined in the software RAID cost section would apply to hardware RAID as well.

RAID is complex and many factors influence the final performance. so if you added another 2 disks would it then create 3 mirror sets or will it still be 2 mirror sets but 3 disks in each set? This makes it dramatically safer than RAID 5, which is very important, but also imposes a dramatic write penalty. That means a mix of several 2 TB drives and a single 1 TB leads to all disks only using 1 TB of storage capacity.

This is a "best case" number but the real world number is so close that it is very practical to simply use this formula. My new router will come with a USB 2.0 hookup in the back. Parity information is created for each block of file data and written to the volume's disks (see below for the way RAID 4 and RAID 5 do this differently). RAID 6, however, is based off of RAID 5 and has another level of parity.

For HDD tests, the Mac was connected to 1 (for "4 Disks") or 2 (for "8 Disks") OWC ThunderBay 4 enclosures containing Toshiba 3 TB hard disks. This is a nested or hybrid RAID configuration. First time installing raid 1 configured but motherboard is changed so raid not configured. RAID 1 offers a level of data redundancy, and the array can be rebuilt in the event of a drive failure without any loss of data.Performance can also be improved somewhat,

Creating the fastest possible stripe volume Click here to find out how you can optimize your volume's performance to achieve even faster read and write speeds. If I want to have BEST READ and WRITE performance and not loose ANY data if ONE drive fails, then what RAID do I use? Retrieved 2014-06-11. ^ a b "Which RAID Level is Right for Me?: RAID 1 (Mirroring)". So that I can understand clearly.

Software RAID can also comprise virtual RAID solutions offered by vendors such as Dot Hill to deliver powerful host-based virtual RAID adapters. If the power supply, cables or disk interface in one enclosure fails, your RAID 1+0 volume will continue to work. RAID works best for drives with the same capacity and using the same (type of) controller. RAID3, which is rarely used in practice, consists of byte-level striping with a dedicated parity disk.

The total capacity of a RAID 1 volume will equal the capacity of a single drive on account of the redundancy: If two 1TB drives are used, the total capacity of AnandTech.com. Our blended 50/50 IOPS would come out to only 562.5.