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Old 02-23-2018, 01:28 PM   #1
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Default Is there a way to creat RAID 0 externally?

Well?

I have a HDD docking and an external USB3 HDD player on my main computer and the data I want to migrate to the other computer on this RAID 0 setup is already there and that's why I'm not just connecting the two HDD's on the other computer and setup the RAID 0 there.

Can I use that to create two HDD's in RAID 0 then put them on another computer? The main computer has enough space to temporary use for data transfer if needed. It's for storage only. The other computer already has Windows 10 on an SSD.
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Old 02-23-2018, 01:48 PM   #2
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Default Re: Is there a way to creat RAID 0 externally?

I think you could setup a pool with storage spaces and then move the drives to the other computer. Not exactly a raid but it will do striping. Also make sure you have a backup.
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Old 02-23-2018, 02:50 PM   #3
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Default Re: Is there a way to creat RAID 0 externally?

Does stripping mean the doubled performance? That's what I'm after thinking of RAID 0.
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Old 02-23-2018, 09:09 PM   #4
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Default Re: Is there a way to creat RAID 0 externally?

Don't know if doubled, but it's better performance for sure.

https://en.m.wikipedia.org/wiki/Data_striping

And it's what RAID 0 does.

I didn't understand why you can't just plug in the dock to the other PC. And what do you mean by externally?
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Old 02-23-2018, 09:46 PM   #5
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Default Re: Is there a way to creat RAID 0 externally?

The docking requires an HDD to transfer files and I don't have an extra HDD for that. The other computer also does not support USB3 and using it there takes ages to transfer the already set files anyway.

By "externally" I mean by removing the HDD's from the target computer and work on them on another computer because they are full already. If they were not, all this wouldn't be necessary. E.g. computer A has two almost full HDD's. I want to remove them and use computer B to store their files then restore the files to them but by stripping then return the two HDD's to computer A setting them up as RAID 0.

RAID 0 doubles the performance and adds up the total capacities of the two HDD's.
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Old 02-24-2018, 11:30 AM   #6
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Default Re: Is there a way to creat RAID 0 externally?

You could just try. It's really easy to set up RAID in Windows. Plug them in, backup the data and set it up. Then try just unmounitng and connect them to the other computer. The only thing you can loose is time.
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Old 02-24-2018, 11:36 AM   #7
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Default Re: Is there a way to creat RAID 0 externally?

That's the plan now that computer A has space to temporarily backup the files.

One of the HDD's has serious latency/access time problems. I'm fully formatting it now to try it. If it's no use, no RAID.
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Old 02-24-2018, 11:41 AM   #8
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Default Re: Is there a way to creat RAID 0 externally?

Any external drive are considered removable drive. I don't know if you can use them in a RAID configuration.

Then again I don't know anything about RAID.
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Old 02-24-2018, 11:56 AM   #9
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Default Re: Is there a way to creat RAID 0 externally?

I don't see why not. They are the same only with a different interface.
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Old 02-24-2018, 12:33 PM   #10
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Default Re: Is there a way to creat RAID 0 externally?

Like I said I don't know much of RAID but for fixed drives. That's all I know.
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Old 02-24-2018, 01:03 PM   #11
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Default Re: Is there a way to creat RAID 0 externally?

HDD docking can still be used as internal connection. But anyway, mission aborted. RAID 0 is not protection reliable and one HDD is confirmed to be a nutjob. If it fails, all will be lost. Abort mission, ASAP. These HDD's are like 10 years old and were abused.
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Old 02-24-2018, 01:14 PM   #12
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Default Re: Is there a way to creat RAID 0 externally?

Shit, no wonder.

Quit being cheap, buy a drive!
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Old 02-24-2018, 01:31 PM   #13
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Default Re: Is there a way to creat RAID 0 externally?

You could use a different RAID method. Why is that not an option? Because the drives are too slow?
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Old 02-25-2018, 01:40 AM   #14
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Default Re: Is there a way to creat RAID 0 externally?

Just in case, and a reminder, it's a 7 year old side computer built/complemented with left overs I'm fooling with that works rather fine. Considering spending money on it in this part is stupid

Yes, the idea was to speed them up. Other RAID's (than RAID 0 "zero"), as far as I know, don't concern speeding up, and/or require more than two drives.

But here's the thing: I found another HDD in my junk that's ~150MB/s sequential reading/writing fast (buying one was a stupid idea, see?). The two I wanted to RAID 0 (using RAID as a verb here) were ~80MB/s and one of them is acting up (other reading/writing methods scale similarly). Now I have two nicely working HDD's so case closed. If I RAID 0 them the faster will go down to the slower and ultimately end up with ~160MB/s. Not worth the trouble and the protection risk and what needs the speed is all stored in the ~150MB/s HDD. Windows already has it's own SSD. Speeds were tested with Crystal Disk Mark.

And BTW, it's all assembled and running now. The lag/freezing I had that pushed me to think RAID 0 is now completely gone. It was especially pronounced in Gex on PS1 emulator
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Old 03-02-2018, 11:44 AM   #15
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Default Re: Is there a way to creat RAID 0 externally?

Simply put.

1, no, at least not with USB docks
2, don't

you already covered point 2, as the data is stripped failure of one drive means loss of all data.

the reason you can't do it with USB docks is that the controller is the device that controlls the raid array.
if you setup an array with windows disk manager, that's great, but you don't move the array controller (windows) with the disk when you move them.

If you get an external device (like synology NAS) etc, then you have a box with a controller in it, and then when you connect it to another machine that controller IS taken with the drives.
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Old 03-02-2018, 12:03 PM   #16
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Default Re: Is there a way to creat RAID 0 externally?

Ah, it's all about the controllers. I knew I missed something.
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Old 03-02-2018, 12:31 PM   #17
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Default Re: Is there a way to creat RAID 0 externally?

So different controllers run even the same RAID level (zero in this case) differently that the setup does not work among one another. I didn't know that and thought RAID 0 can be done in software mode.

Well, good thing I aborted mission then. The comp is all set and ready now.
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Old 03-02-2018, 03:09 PM   #18
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Default Re: Is there a way to creat RAID 0 externally?

If you could plug in two drives to a USB 3.0 port through a two port docking station and if your objective was to increase performance, you would be hamstrung by the USB spec.

SATAII - 600MBps
USB 3.0 - 640MBps

So when you try to double the SATAII speed to 1200MBps by running two, you far exceed the USB spec.

Either way, I've never heard of doing it externally except in disk enclosure units designed to do so.
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Old 03-02-2018, 04:20 PM   #19
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Default Re: Is there a way to creat RAID 0 externally?

Quote:
Originally Posted by zomgmike View Post

Either way, I've never heard of doing it externally except in disk enclosure units designed to do so.
That's the point I made.
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Old 03-03-2018, 03:09 AM   #20
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Default Re: Is there a way to creat RAID 0 externally?

The USB3 limitation is not a problem really. I thought of using the docking just for the procedure of creating the RAID then move the HDD's to an internal setup on another computer.

But that's an obsolete information now as you said and known earlier.
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