Sign in to follow this  
krillik

New storage array, looking for tips!

Recommended Posts

Hello all! I am currently in a pickle. I have never used RAID before and I do not know much about it. I have been looking online and reading a bit about it, but I do not understand fully. Let me give you my specs first:

X6DH8-G2 motherboard

1x 150GB WD Raptor 10krpm (boot)

3Ware AMCC 9550sx-8lp Sata Raid Card with battery backup

3Ware 9550SX-12SI Sata Raid Card

16x 1TB 2.5" drives

4x ICY DOCK MB994SP-4SB-1(storage array)

I am using a full tower case, which is why I am going with the 1TB drives in 2.5".

Now what I was originally planning to do, is make this into a SAN with a fibre channel connection to another computer that sees it as DAS. I think I am straying away from that at the moment and just going to make it into a NAS with the SAN possibility in the future. I am trying to find what RAID I should do. I was thinking about RAID 5 since RAID 6 isnt supported by my controllers I will be getting. I guess I could check with the manufacturer and see if there is a firmware update that lets it do RAID6, but I dont know if that is a possibility or if its hardware limited. I want to get the most storage space possible from this array. This will be a media server for streaming 1080p and 3D content to multiple televisions simultaneously. I was thinking about maybe RAID5 or RAID50. I cant seem to find out if RAID50 would decrease the storage space as opposed to regular RAID5? I know RAID isnt a substitute for backing up but backing up that much data would be horrendous. I thought about doing tape backup but the amount of tapes needed would probably make it cheaper to buy the amount of drives needed for mirroring. Sure the data is not critical, but who wants to have to replace 14tb of data lol. Also, would having a drive like a 2TB WD green drive not in the array for the streaming be a good idea? That way it would decrease the writes needed to the array? Also, is having an SSD for a cache drive good? How would one approach this with a RAID array? Can I use a cheaper SSD (64GB one from microcenter, microcenter brand)? Oh and I am thinking about using this on WHS 2011. That is currently what I am using on my server. I might be more open to other suggestions but I have zero experience with linux but I do like the command line. I have to use a CLI for work and I enjoy typing commands, so I might be able to enjoy linux. Currently I just use the WHS for ease of use.

Thanks everyone in advance for your advice!

Share this post


Link to post
Share on other sites

Hello there!

The PCIx 9550SX controller from 3ware does not do RAID 6 due to HW limitations.

(Note that the 9550SX does not support > 2TB drives)

RAID 5: if X drives in a RAID 5, X-1 drive capacity.

1x sixteen drive RAID 5 sub-units (+ 0 spare) meaning total capacity of 15* drive capacity = ~15GB

1x fifteen drive RAID 5 sub-units (+ 1 spare) meaning total capacity of 14* drive capacity = ~14GB plus a spare

RAID 50 would be space reduced according to how many drives would be grouped in RAID5 the striped in raid 0:

5x three drive RAID 5 sub-units (+ 1 spare) meaning total capacity of 5*2 drive capacity = ~10GB plus a spare

(RAID 0)

/ /|\ \

/ / | \ \

/ / | \ \

/ / | \ \

(R5)(R5)(R5)(R5)(R5)

/|\ /|\ /|\ /|\ /|\ spare

DDD DDD DDD DDD DDD D

4x four drive RAID 5 sub-units (+ 0 spare) meaning total capacity of 4*3 drive capacity = ~12GB

(RAID 0)

/ || \

/ || \

/ / \ \

/ / \ \

(R5)(R5) (R5)(R5)

/||\/||\ /||\/||\

DDDDDDDD DDDDDDDD

3x five drive RAID 5 sub-units (+ 1 spare) meaning total capacity of 3*4 drive capacity = ~12GB plus a spare

(RAID 0)

/ | \

/ | \

/ | \

| | \

(R5) (R5) (R5)

//|\\ //|\\ //|\\ SPARE

DDDDD DDDDD DDDDD D

2x height drive RAID 5 sub-units (+ 0 spare) meaning total capacity of 2*7 drive capacity = ~14GB plus a spare

(RAID 0)

/ | \

/ | \

/ | \

| | \

(R5) (R5) (R5)

//|\\ //|\\ //|\\ SPARE

DDDDD DDDDD DDDDD D

Hope this helps!

Good luck!

MEJV

(Darn, can't get the text display properly... Hope you get the picture anyways!)

Edited by mejv

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this