gberg Posted March 15, 2021 Share Posted March 15, 2021 Do you guys use the preclar plugin, and if so, how many passes do you run before adding a new drive to the array? In my Unraid I currently use six 10TB WB My Book, and the seventh is currently preclearing. I do two preclear passes before I shuck the drive, and then I do one pass after I installed the drive internally. When I do the first preclear passes while the drive is still in the USB case I use a fan on top of the case for cooling, and the temperature stays below 35°C. Quote Link to comment
Lumpy_BD Posted March 15, 2021 Share Posted March 15, 2021 I just do 2 passes while in the USB enclosure and leave it at that. Personally I don't see any reason to do more than that, but I guess it comes down entirely to your risk appetite. If the extra pass helps you sleep better at night then go for it! Quote Link to comment
Frank1940 Posted March 15, 2021 Share Posted March 15, 2021 I use the preclear Docker and I try to get about 70+ hours on the hard drive. My objective is to make sure that the HD is not going to fail because of infant mortality. I do this for two reasons. 1-- I test as soon as I get the disk. I only purchase from vendors who provide for 'no-hassle' returns with in X days of purchase for DOA drives. This means I don't have to deal with warranty issues with the manufacturer. 2-- I have a policy that I want a cold spare ready for installation if a disk 'red-balls'. I pull the disk and replace with the cold spare and start the rebuild. When that is complete and the server is working normally again, I can take my time to test and determine what to do with 'defective' disk... Quote Link to comment
gberg Posted March 16, 2021 Author Share Posted March 16, 2021 14 hours ago, Frank1940 said: I use the preclear Docker and I try to get about 70+ hours on the hard drive. My objective is to make sure that the HD is not going to fail because of infant mortality. I do this for two reasons. 1-- I test as soon as I get the disk. I only purchase from vendors who provide for 'no-hassle' returns with in X days of purchase for DOA drives. This means I don't have to deal with warranty issues with the manufacturer. 2-- I have a policy that I want a cold spare ready for installation if a disk 'red-balls'. I pull the disk and replace with the cold spare and start the rebuild. When that is complete and the server is working normally again, I can take my time to test and determine what to do with 'defective' disk... Ok, that seems like a smart strategy. For my 10TB WD My Book it takes about 56 hours for each pass (pre-read, zeroing and post-read), so two passes might be more than enough. Ana I have also thought about having a cold spare at hand, maybe not a bad idea. Quote Link to comment
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