Hi All

I am new to the unRAID scene having been a long time openFiler user, I find the concept of unRAID far more flexable for the home user environment due to being able to use different sized hard drives in the same array. But you all already know that. So my problem is

I have a small test rig with 3x 80GB Hard drives using the free version (Will purchage the pro once I've successfully tested and got a DLNA server working on it)

 

Test 1/

I have a share call bluray images with allocation method set to fill-up

The array show the free space is 74.5GB * 2 = 149GB

I copy a 44GB image to the share. No problems

The Share how have 105GB Free. DISK1 = 30.5GB Free, DISK2= 74.5GB Free

I copy another 40GB image to the share. It get about 80% in and fails with insufficent space.

Im guessing because Disk 1 does not have enought space for the file.

 

Test 2/

I have a share call bluray images with allocation method set to Most Free

The array show the free space is 74.5GB * 2 = 149GB

I copy a 44GB image to the share. No problems

The Share how have 105GB Free. DISK1 = 30.5GB Free, DISK2= 74.5GB Free

I copy another 40GB image to the share. No Problems

The Share how have 65GB Free. DISK1 = 30.5GB Free, DISK2= 34.5GB Free

I copy a third 42GB image to the share. Again It get about 80% in and fails with insufficent space.

 

The question is, is there an option to allow large files to be split across hard drives, or is this a limitation of the free version.

Or maybe, can I make a suggestion to the developers to have an options that allows particullar shares to report the free space as the largest file size that can be written (The largest free space on an individual drive) and not the total free space of all drives.

Set the min free space for the share to something around the size of the largest image you will be copying to it.

Thanks prostuff but it still didn't help much

 

Test 3/

I have a share call bluray images with allocation method set to Most Free and min free space at 50GB

The array show the free space is 74.5GB * 2 = 149GB

I copy a 44GB image to the share. No problems

The Share how have 105GB Free. DISK1 = 30.5GB Free, DISK2= 74.5GB Free

I copy another 40GB image to the share. No Problems

The Share how have 65GB Free. DISK1 = 30.5GB Free, DISK2= 34.5GB Free

I copy a third 42GB image to the share and get an error straight away that there is not enought free insufficent space. Need an extra 42GB to copy the file.

 

Looks like the unRAID file system can not split a single file across multiple hard drives. Is this correct?

 

correct.  unRAID is a parity protected JBOD and the User Shares are just showing a combination of the disks.  You need 42GB of free space on a single disk to copy that file to it.

 

Each disk has its own file system and therefore no stripping happens.

That would be correct. The files are distributed amongst the hard drives (if you set it like that), but will not split a file between multiple hard drives. There is no striping.

 

If you need to copy a file that's larger than 1Tb, unRAID probably isn't for you 

 

That's the beauty of unRAID..  run out of space, buy another hard drive, slap it in, and continue copying.

It makes sence. If I even get in that situation (Possible by highly unlikely), all I need to do is slap in another drive and away I go. I like unRAID.