Hello,

 

i want to use a Intel Optane SSD 16GB (https://ark.intel.com/products/97544/Intel-Optane-Memory-Series-16GB-M_2-80mm-PCIe-3_0-20nm-3D-Xpoint) for the Unraid OS. Is it enough or not?

 

Would you use Intel Optane or a Samsung 850 Pro 128GB?

 

Regards

Lyror

unRAID installs onto a USB stick. As it boots, the OS is installed into a RAM disk. So there is no persistent "unRAID OS disk". 

 

unRAID has a concept of a cache disk. The cache disk holds things like Virtual Machine images, Docker containers and configurations, and can also act as a high speed landing zone for files to be copied to the array. SSD / M2 disks make great cache disks. But I would say that 16G would be too small to be useful. 128G, 250G, 500G are more common sizes. 

 

Get a 4G - 16G USB stick to install unRAID. This small M2 drive is probably not going to be too useful.

Ok. This means i can't unplug the USB stick after first start and so on. The USB stick must always plug in that unraid works.

 

For the Cache i want to use a 512GB SSD 850 Pro

 

Thanks

Edited June 29, 20179 yr by Lyror

The USB stick must always be plugged in, yes.

Can i create a vm that use a part of dedicated ssd for the OS? I want to get the advantages like fast boot etc.

Edited June 29, 20179 yr by Lyror

The OS loads into RAM at boot (RAM is much faster than an SSD). The USB is the install media. Once the OS is installed, the USB is not used except for maintaining a few configuration files. The boot takes 1-3 minutes depending on the USB speed, number of disks, controller initializations, and motherboard.

 

Most people run their servers 24x7, with boots occurring monthly or even less frequently. So boot time is pretty meaningless.

 

Suggest you setup the USB disk and try it out.

 

Most new users are asking questions about performance of writes to the protected array. You might do some research there.

1 hour ago, Lyror said:

Can i create a vm that use a part of dedicated ssd for the OS? I want to get the advantages like fast boot etc.

If your question is about the unRAID OS bjp999 has already answered it.  But, if you are referring to the VM OS, the unRAID cache drive is the default location for the OS image.

2 hours ago, bjp999 said:

...

unRAID has a concept of a cache disk. The cache disk holds things like Virtual Machine images, Docker containers and configurations, and can also act as a high speed landing zone for files to be copied to the array. SSD / M2 disks make great cache disks. But I would say that 16G would be too small to be useful. 128G, 250G, 500G are more common sizes. 

...

 

Heh, I stand corrected.  OP, your questions have simply been answered :).