A guru's world: raid craze

[Adul]

Has you know jonnyguru writes this column. usually a good read.

http://www.slcentral.com/agurusworld/29/

 

[Yossarian]

It's sad that I'm strangely entertained by the RAID math. Thanks for the link.

 

[Adul]

<< It's sad that I'm strangely entertained by the RAID math. Thanks for the link. >>



And i thought I was the only one.

 

[Rand]

<<

<< It's sad that I'm strangely entertained by the RAID math. Thanks for the link. >>



And i thought I was the only one. >>



Unfortunately no, it's sad that I actually bothered to do the math to work out the last question.

 

[Adul]

yeah me to 😛

BtW the answer is 80 GB.

 

[jonnyGURU]

Adul, Don't forget to tell everyone how off your first guess was. 😉

 

[ChrisIsBored]

eh... he talks a lot about RAID 6, I don't know of anyone who actually supports or regularly uses RAID 6. It would be a waste of space, 2 drives left for fault tolerance rather than 1 such as in a RAID 5, you might as well just leave one drive as a hotspare so it's not in use. Less chance of it going bad if the drive isn't actually in use and is there to backup a failed drive on the fly.

 

[jonnyGURU]

eh... he sure does. /me looks around

The only good thing about RAID 6 is the fact that the data is striped twice over the array. This means that 2 drives can die. Let's just say that the server is left unattended over the weekend and two drives die.

Hey... Could happen. 😉

When spending that much money on data storage, do you think the price of one more drive is really critical?

 

[Adul]

Not when compared to the value of the data. its peanuts.

I was thinking raid 5 with 4 drives at first 😱

 

[bluemax]

<< yeah me to >>


Good in math, bad in english? 😉😉

 

[Pariah]

Good luck even finding a RAID 6, AKA RAID 5+, capable adapter let alone finding someone using one. Controller design is extremely complex for RAID 6 and the performance is pretty poor accordingly. There are better and cheaper solutions vs RAID 6 when you factor in the cost of RAID 6 capable adapter.

 

[jonnyGURU]

That's why I said "the only good thing". 😉

I find that RAID 5+1 is quite accomodating and controllers are readily available.

 

[Pariah]

I don't know about readily available, I don't think I've ever seen one. The only RAID levels I would consider readily available would be 0,1,10,0+1, and 5. 3, 30, 50, and 0/5 are available on most highend cards. Using multiple RAID controllers, RAID5+1 would be pretty easy to implement.