[NEW] What is RAID and what are the different RAID modes? | the raid – Pickpeup

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Note: Not all StarTech.com devices support each of the RAID modes described below. For more information on the RAID modes that your device supports, refer to the manual or the StarTech.com product page.

Redundant Array of Independent Disks (RAID) is a virtual disk technology that combines multiple physical drives into one unit. RAID can create redundancy, improve performance, or do both.

RAID should not be considered a replacement for backing up your data. If critical data is going onto a RAID array, it should be backed up to another physical drive or logical set of drives.

The following are terms that are normally used in connection with RAID:

  • Striping: data is split between multiple disks.
  • Mirroring: data is mirrored between multiple disks.
  • Parity: also referred to as a checksum. Parity is a calculated value used to mathematically rebuild data.

Different RAID levels exist for different application requirements.

Refer to the following table for the list of RAID modes offered by some StarTech.com products:

RAID mode
Description
Operation
Advantages
Disadvantages
Recovery

RAID 0
Striped disks
Data is split evenly between two or more disks.
Large size and the fastest speed.
No redundancy.
If one or more drives fails, this results in array failure.

RAID 1
Mirrored disks
Two or more drives have identical data on them.
A single drive failure will not result in data loss.
Speed and size is limited by the slowest and smallest disk.
Only one drive is needed for recovery.

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RAID 3
Striped set with dedicated parity
Data is split evenly between two or more disks, plus a dedicated drive for parity storage.
High speeds for sequential read/write operations.
Poor performance for multiple simultaneous instructions.
A single drive failure will rebuild.

RAID 5
Striped disks with distributed parity
Data is split evenly between three or more disks. Parity is split between disks.
Large size, fast speed, and redundancy.
The total array size is reduced by parity.
A single drive failure will rebuild.

RAID 10
1+0; Striped set of Mirrored Subset
Four or more drives are made into two mirrors that are striped.
Larger size and higher speed than RAID-1, and more redundancy than RAID-0.
No parity.
Only one drive in a mirrored set can fail.

JBOD
Just a Bunch Of Disks
Any number of drives are accessed independently by the operating system.
Software RAID modes can be used.
Hardware RAID may have better performance.
N/A

Big
Spanning or Concatenation
Data is written on one drive until it is full, and then the next drive(s) until it or they are full.
Creates a very large and simple array.

No redundancy.

N/A

Clone
RAID 1 + Spare

Two drives have identical data, plus one drive is used for rebuilding in case of a primary array failure.

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Seamless operation when one drive fails in a RAID-1 array.
Spare drive is not accessible to the user.
Only one drive is needed for recovery.

 


The Raid – Drug Room Fight Scene [HD]


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The Raid - Drug Room Fight Scene [HD]

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Sixth Floor Stairwell Fight | The Raid: Redemption


The squad retreat to an empty apartment and try to fight off Riyadi’s thugs.
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Deep in the heart of Jakarta’s slums lies an impenetrable safe house for the world’s most dangerous killers and gangsters. Until now, the rundown apartment block has been considered untouchable. Cloaked under the cover of predawn darkness and silence, an elite swat team is tasked with raiding the safe house in order to take down the notorious drug lord that runs it. But when a chance encounter with a spotter blows their cover and news of their assault reaches the drug lord, they find themselves stranded on the 6th floor with no way out. The unit must fight their way through the city’s worst to survive their mission.
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Sixth Floor Stairwell Fight | The Raid: Redemption

Sersan Jaka vs. Mad Dog Scene


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‘The Raid: Redemption’ Trailer | Moviefone


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As a rookie member of an elite specialforces team, Rama (Iko Uwais) is instructed to hang back during a covert mission involving the extraction of a brutal crime lord from a rundown fifteenstory apartment block. But when a spotter blows their cover, boss Tama (Ray Sahetaphy) offers lifelong sanctuary to every killer, rapist and thief in the building in exchange fortheir heads. Now Rama must stand in for the team’s fallen leader (Joe Taslim) and use every iota of his fighting strength winding through every floor and every room to complete the mission and escape with his life.
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'The Raid: Redemption' Trailer | Moviefone

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