New on LowEndTalk? Please Register and read our Community Rules.
All new Registrations are manually reviewed and approved, so a short delay after registration may occur before your account becomes active.
All new Registrations are manually reviewed and approved, so a short delay after registration may occur before your account becomes active.
Comments
wow that is a good question.
Well on redundancy I can say that 8x has a benefit over 4x. More room for failure, less urgency in a failure.
But you can still be unlucky and have two mirrored drives fail which would "destroy" the array right?
Each mirror can have a drive failure. So if you're lucky, in a 8-drive RAID10 array, you could have a 4-drive failure and still retain data, as long as every failure was in a different mirror.
I would say that 8x 7.2k would be better. More spindles will win over spinning the drives faster.
For single threaded IOPS, 4 x 15K will be better. For multi threaded IOPS 8 x 7.2K will be better.
For VPS hosting 8 x 7.2 for application based stuff 4 x 15k
Exactly, it depends on what you're doing, what hardware you need. Without a scenario form the OP, we can't make a proper recommendation without purely speculating.
For shared webhosting with cPanel, there'll be quite a few people on it, mainly running Wordpress or similar CMS'es / e-commerce applications on it.
Then 4 x 15k will give you better read access times I would think under load.
The other option which would beat both for this sort of thing would be 4 x 7.2 - SSD cached.
can you draw, how can be the 8 disk raid10 ??
Strip 0 = Disk 0/1/2/3
Strip 1 = Disk 4/5/6/7
Strip 1 is a mirror of strip 1?
Good raid card and 8 x good 7200 will give a lot more amazing results than only 4 hard drives server.
Have a look on this http://4.bp.blogspot.com/-5ryOgMntiwg/UNlFlfUFk_I/AAAAAAAABXM/XU41IlDEvns/s1600/220px-RAID_10.png
(cant get image emedding to work for some reason)
Strip 1 = Disk 4/5/6/7
No that's raid 0+1. Two RAID-0 stripes that are mirrored.
RAID 0+1:
Disk 1,2,3,4 -> stripe 1
Disk 5, 6,7,8 -> stripe 2
Volume: mirror of stripe 1 and 2
Raid 10 (1+0) is:
Disk 1 <- mirror -> Disk 5
Disk 2 <- mirror -> Disk 6
Disk 3 <- mirror -> Disk 7
Disk 4 <- mirror -> Disk 8
Volume: Stripe across the four mirrors.
Thanks for the correction, I realized I posted 0+1 as well haha.
thanks for the info =D
Is there any other raid type which gives more data security and upto how much disk falure does it support?
-From a non technical guy..
-From a non technical guy..
RAID 0+1 with two different drives in stripe, then have as many mirrors of these drives as you want
@Mikeln Sure: if you have 16 disks, RAID 66
O.o Thanks guys
would be nice raid 11, múltiple mirrors, but with fast speed
How about 2x SSDs in raid 1 then? Would that be even better for shared web hosting?
http://www.lowendtalk.com/discussion/8973/software-raid1-with-ssds-instead-of-hardware-raid10-with-mechanical-drives had some discussion on the subject.