December 26, 201312 yr I am just starting with unRAID as I migrate over from a FreeBSD ZFS system so I have a noob questions on preclear. I just bought 5x WD40EZRX and am currently running preclear on all of them. When I started preclear I did not use -A. I thought I had read that on the current version of preclear that if unRAID is set to use 4k alignment (MBR: 4K-aligned) in Disk Settings that preclear would automatically use 4K alignment (now I can't find where I read that). Was this correct, or do I need to run preclear again with the -A argument? My unRAID web GUI is set to MBR: 4K-aligned. I also think I had read that there was a quick way to change a precleared disk to 4K alignment after the fact. Is this true and if so what is the command? Thanks, craigr
December 26, 201312 yr Author I am using preclear 1.14 and unRAID 5.04. From some other threads I have read it sounds like drives larger than 2.2 TB will automatically be 4K aligned. It also seems that I could have used -A, but that it would have been silently ignored anyway. Is this correct? craigr
December 26, 201312 yr Correct. The -A argument is silently ignored on all disks larger than 2.2TB because they are all GPT partitioned and 4k aligned by default.
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