Tabraxis

I seem to recall that the issue is actually the memory required for each disk being precleared, not the CPU usage. Hmm, from what i see, the mem usage is 2% but the cpu is now 45-53% (with 4 pre-clear drives running). In this instance it seems to be more cpu then memory? I think i'm going to throw 2 more disk's on and call it. I don't want to stress the disk's/system/plugin with too much. I'll do another 6 after these finish.

With unRAID 32bit v5 it was definitely possible to run out of memory preclearing. Not sure if it still an issue with 64bit v6. I'm not aware of anyone trying as many as you are suggesting so you may just have to try it and see. Can't imagine you really need all of them at once though so you might go with fewer at one time. Unless you break it by running too many you should be able to use your server for other things while preclearing, such as loading data to the drives already precleared so maybe not that important to do it all at once anyway. Thanks for the reply, I have Unraid V6.1.3? ( I think). The issue was i had a failure of my unraid HBA cards. I had 3 Supermicro HBA cards and for some reason only 2 were showing during post. So when 1 drive failed (amusingly) when it tried to rebuild, it could not. only once i shut the array down, did i notice that drives 1-8 had "disconnected device", causing all kinds of issues. I'm now on a M1015 flashed to 2008IT & SAS expander and all seems well. So now i want to wipe clean all the dirty data and start fresh. Which is why i was looking to try as many drives as possible as the current 4TB is taking 16hrs at 70%... So if i want to start my uploading this weekend... i need them all cleaned. On a side note, i do notice that my cpu usage is 24-29%, so i'm going to try to load 3 more and see what happens.

Hello All, I tried going through the previous post listings, but was not able to see (or maybe I gleamed over it?), but is there a limit on how many drives can be pre-cleared at one time? eg, is the pre-clear based on cpu/mem or is it isolated to the hdd itself? I have a 1230v3/32GB and 20 drives, am i able to start the pre-clear on all 20 (well 18 now, 1 in array and 1 is currently running 49% @ 14:48:32) so that they will all be done roughly around the same time. Or will i have to break it up to say 5x4HDD's per pre-clear? Sorry if this type of question was asked before. Thanks.