Hi!

 

I´m thinking about giving Unraid Server a try on my hardware.

 

My is not running 24/7 and don´t need any kind of raid. So is it possible to build just an array of disks to something like a jbod where i can set every single drive into standby for saving energy?

 

Rockstor ist very nice for handling this but i can´t set all drives except the one acutally used into standby mode. OMV with mergerfs does work but takes to much CPU power.

 

So is there any possible solution using unraid?

 

I´ve read that unraid provides kind of autoshut down plugin using dynamix plugins which i also appreciate.

 

Thx!

 

b0mb

Yes you can spin down all drives at a specific time called Default or you can assign spin down times to each disk individually. 

You might want to reconsider your choice of not using a parity drive.  Not running a server 24-7 will NOT prevent disks failures!  The failures modes of hard disks are many and varied but the end results of these failure modes is that ALL hard disks will eventually fail.  Some just sooner than others!

 

By the way, unRAID will only spin up the data disk needed when it reads the file and will only spin up the parity disk and the data disk when writing a file.  The other disks remain spun-down.

 

I have had at least two hard disks fail over the last five years and neither time did I lose a single file because the parity disk allowed me to rebuilt the failed disk in its entirety!

 

EDIT:  JBOD is possible with unRAID.  Just don't assign a parity disk and you have (by default) a JBOD.

Edited March 27, 20179 yr by Frank1940

To expand on what kizer said:

Unraid, being that it is not raid, does not have any interdependence between your data drives.

Thus if you have some number of data drives (let's say 10) and 1 or 2 parity drives, when you write data the system will (generally) spin up the drive being written to and the 1 or 2 parity drives.

When you read data, the system will only spin up the one drive being accessed.

Depending on your usage pattern, this could mean that the whole system spends most of its time with all drives spun down and, even when being used, with only 1-3 drives spun up.

(again, depending on what you are actually doing with the system, dockers and VMS, etc)

 

 

You might also want to read this thread on the probability of hard disk  failures and the discussion that followed.