Question about raid and hard drives.

[Zany]

Which raid mode is best in terms of speed and can back up. Also how many drives are needed for that raid mode?

How often to hard drives fail? Which brand of hard drives are most reliable?

Thanks in advance for helping clear things up.

[andi1455]

I recommend RAID5. In this mode one hdd can fail and you still have all your data.

You need at least 4 hdd.

I think Western Digital Red drives are most reliable and are perfect in a RAID environment.

[VictorB]

Raid is not a backup! allways have a sperate backup!

http://en.wikipedia.org/wiki/Standard_RAID_levels

Please read:

Raid 0

Raid 1

Raid 5

Raid 10

:)

[MartyniP]

http://en.wikipedia.org/wiki/Standard_RAID_levels Please read: Raid 0 Raid 1 Raid 5 Raid 10 :)

RAID 6 Is also a notable level, for large arrays at least.

[VictorB]

http://en.wikipedia.org/wiki/Standard_RAID_levels Please read: Raid 0 Raid 1 Raid 5 Raid 10 :)

RAID 6 Is also a notable level, for large arrays at least.

Yes :) But for his question is raid6 not needed :)

[looney]

well as this is linustechtip:

http://youtu.be/RYBtmVMtH1g

http://youtu.be/TuwjadbtUCY

[Zany]

Raid is not a backup! allways have a sperate backup! http://en.wikipedia.org/wiki/Standard_RAID_levels Please read: Raid 0 Raid 1 Raid 5 Raid 10 :)

I'm going to raid 5 some hard drives but I don't know which hard drives to use.

This is also going to be in a computer not an NAS but should I use WD Reds like andi said or use something faster like WD Blacks?

[looney]

Raid is not a backup! allways have a sperate backup! http://en.wikipedia.org/wiki/Standard_RAID_levels Please read: Raid 0 Raid 1 Raid 5 Raid 10 :)

I'm going to raid 5 some hard drives but I don't know which hard drives to use. This is also going to be in a computer not an NAS but should I use WD Reds like andi said or use something faster like WD Blacks?

that depends on what you want to use it for, if its only for simple media storage then you really don't need expensive black drives.

also with raid5, the actual calculations of the parity are usually the thing slowing everything down, unless you get a expensive hardware raid card, or you run snapshot raid.

[Richard Burton]

For the best performance RAID 0 is optimal. RAID 0 stripes data between the different physical drives. The problem with RAID 0 is when one drive fails in array all the data across all the drives is lost. RAID 1 mirrors data between the drives. Yielding no performance gain and for every drive in the array yo u add you won't increase total capacity. e.g. 2 1TB drives in RAID 1 give a total capacity of 1TB, but your data is secure so that if a drive fails you have all your data on the other drive/s. all other RAID NUMBERS are, put simply, different configurations of them. Depending on how many drives are in the array you may want to choose RAID 0 and back up regularly, RAID 1, RAID 5, RAID 9.