Discription of the Different Raid levels

[Ankerson]

Raid 0..... Striping (without parity)

Raid 1....Mirroring or Duplexing

Raid 2...Bit-level striping with Hamming code ECC

Raid 3...Byte-level striping with dedicated parity.

Raid 4... Block-level striping with dedicated parity.

Raid 5...Block-level striping with distributed parity.

Raid 6..Block-level striping with dual distributed parity

Raid 7..Asynchronous, cached striping with dedicated parity.

Raid 0+1 and 1+0.....Mirroring and striping without parity.

Raid 0+3....Byte striping with dedicated parity combined with block striping.

Raid 0+5....Block striping with distributed parity combined with block striping.

Raid 1+5....Mirroring (or duplexing) combined with block striping with distributed parity.



Here is a link for more info:

http://www.pcguide.com/ref/hdd/perf/raid/levels/single.htm

[Ankerson]

Could we make this sticky please....:)

[Disk11]

I second this:)
Are some of the not so common RAID levels (2-4, 6-7, etc) unoffical configurations?

[Ankerson]

Originally posted by Disk11
I second this:)
Are some of the not so common RAID levels (2-4, 6-7, etc) unoffical configurations?

There are some custom raid levels that are used but not widely.

Those we don't have to worry about because they are used in HUGE datacenters.


Like running Raid 5 on 4 machines, 15 drives each then combining all of them together for a Raid 0+5.:D

But we are talking Fiber Channel linking all the Arrays together.

[Disk11]

Thanks:t
Definatly deserving of a sticky.

[Ankerson]

Originally posted by Disk11
Thanks:t
Definatly deserving of a sticky.


I don't think they are hearing us.....:mad:

[sm8000]

PM an admin or mod if you want a sticky, see what they say. It's probably in the moderator's forum being reviewed.

Is RAID 1+0 the same as RAID 10, RAID 3+0 the same as RAID 30, and so on?

[Ankerson]

Originally posted by sm8000
PM an admin or mod if you want a sticky, see what they say. It's probably in the moderator's forum being reviewed.

Is RAID 1+0 the same as RAID 10, RAID 3+0 the same as RAID 30, and so on?


Yes, that's just the way some people write them...:)

[Bigjakkstaffa]

It's probably in the moderator's forum being reviewed.

Correct

--Jakk:t

[Ankerson]

Originally posted by Bigjakkstaffa


Correct

--Jakk:t


Ok, thanks..:D

[AllGamer]

This is the best place for RAID info

http://www.acnc.com/04_01_00.html

:t

[Ankerson]

Originally posted by AllGamer
This is the best place for RAID info

http://www.acnc.com/04_01_00.html

:t

Another good link.:D

[sm8000]

Okay, that site says RAID 0+1 is NOT the same as RAID 10....but it says nothing about RAID 1+0....???? :confused:

[Ankerson]

Originally posted by sm8000
Okay, that site says RAID 0+1 is NOT the same as RAID 10....but it says nothing about RAID 1+0....???? :confused:


Raid 0+1 and 01 are the same.

Raid 1+0 and 10 are the same.

But Raid 0+1(01) and 1+0(10) are different

0+1(01) is stripping + Mirror

http://www.acnc.com/img/raid/0p1.gif

1+0(10) is Mirror + Stripping

http://www.acnc.com/img/raid/10.gif

[sm8000]

Instead of a Sticky, have you considered writing an article about RAID for the site?

[Ankerson]

Originally posted by sm8000
Instead of a Sticky, have you considered writing an article about RAID for the site?

That's possible..:)