LTT Style NAS Build

[strk1204]

So I was looking to make a overkill NAS of somewhere close to 16TB in Raid 0 (Ballin and risky but its what I want.)

It will run some linux distro which I'll figure out later but I was wondering the following;

 

1. RAM requried for 16tb ext4 share

2. PSU (for 8x2tb drives)

3. HBA card suggestions (Just hba, no raid features needed.)

[Electronics Wizardy]

Linus style, so you want to lose your data?

 

don't use raid 0, just don't(unless you have HA or very often syncs)

 

 

1. 4gb should be fine, you need very little ram(but id use raid 0 in btrfs)

 

2. 200w should be fine with a lower power cpu

 

3. lsi 9207 8i? used dell h300?

[strk1204]

The plan was a 16TB raid 0 server then a second server which will be slower, but handle backups. Linus style exactly.

[Electronics Wizardy]

1 minute ago, strk1204 said:

The plan was a 16TB raid 0 server then a second server which will be slower, but handle backups. Linus style exactly.

id go raid 5. Add some protection.

[strk1204]

Wouldn't raid 6 be better.

[Electronics Wizardy]

2 minutes ago, strk1204 said:

The plan was a 16TB raid 0 server then a second server which will be slower, but handle backups. Linus style exactly.

what network speed do you have anyways. You probably won't even notice the speed difference between 5 and 0

[strk1204]

Gigabit internally.

[Electronics Wizardy]

1 minute ago, strk1204 said:

Gigabit internally.

wont even notice a differnce then. A single drive will fill gigabit.

[Electronics Wizardy]

3 minutes ago, strk1204 said:

Wouldn't raid 6 be better.

and your suggesting raid 0... Id go 5 if you have a sync over once a day and new drives with less than around 3 years on them.

[Kick]

 

I guess if you're really set with it... I'd recommend RAID w/ parity because that's a fuckton of data and I get a headache just thinking that you'd put it on a RAID 0. Don't go lower than 6. If you want the speed try RAID60. 

[strk1204]

Whats the write speeds like on RAID 60?

[Electronics Wizardy]

1 minute ago, strk1204 said:

Whats the write speeds like on RAID 60?

more than gigabit, so it doesn't matter(normally 300+ with that drive count)

 

Don't run 60 with 8 drives, run 10, you have the same usable space.

 

Id still run 5 or 6

[strk1204]

Which option would provide the best read and write speeds.

[GDRRiley]

1 minute ago, strk1204 said:

Which option would provide the best read and write speeds.

10. it is basicly 4 drives in raid 0 with a mirror image. so reads are 8x a single drive and writes are 4x. 

[Electronics Wizardy]

3 minutes ago, strk1204 said:

Which option would provide the best read and write speeds.

your on gigabit, it doesn't matter, You will be network limited in any drive config, even a single drive is faster than your network.

 

Id personally go raid 5 or 6 depending on how good the drives are

 

What OS?

 

What are you using for raid?

[strk1204]

What is the drive failure tolerance on RAID 10

 

[Electronics Wizardy]

2 minutes ago, GDRRiley said:

10. it is basicly 4 drives in raid 0 with a mirror image. so reads are 8x a single drive and writes are 4x. 

Raid 5 and 6 is still faster in sequential because you can read for 6 or 7 drives at once.

 

Raid 10 is only faster for random iops, Its normally slower for sequential

[strk1204]

1. Software RAID

2. Probably going to be Ubuntu

[strk1204]

Do Raid 10, 5 & 6 all loose the same capacity.

[Electronics Wizardy]

1 minute ago, strk1204 said:

What is the drive failure tolerance on RAID 10

 

up to 4, but depends on what drives failes with atleast one drive failure.

[Electronics Wizardy]

Just now, strk1204 said:

Do Raid 10, 5 & 6 all loose the same capacity.

with 8 dries you have the space of

 

7 usable with raid 5(and 4)

 

6 usable with raid 10

 

4 usable with 10

[GDRRiley]

1 minute ago, Electronics Wizardy said:

Raid 5 and 6 is still faster in sequential because you can read for 6 or 7 drives at once.

 

Raid 10 is only faster for random iops, Its normally slower for sequential

no with raid 10 all drives can be read from and half can be written to. it should be faster in any way.

[Electronics Wizardy]

2 minutes ago, strk1204 said:

1. Software RAID

2. Probably going to be Ubuntu

Id go zfs and raid z then

[Electronics Wizardy]

1 minute ago, GDRRiley said:

no with raid 10 all drives can be read from and half can be written to. it should be faster in any way.

still no reason to go raid 10 unless you need random iops, id go 5 or 6(or raid z

[strk1204]

2 minutes ago, Electronics Wizardy said:

with 8 dries you have the space of

 

7 usable with raid 5(and 4)

 

6 usable with raid 10

 

4 usable with 10

^^?

 

I didn't want to go with ZFS because of the overhead and system requirements. 1gb ram per 1TB + some more for OS.