December 17, 201213 yr Hi, i just got a new hard drive i am preclearing at the moment and I figured this can be a perfect opportunity to align my MBR on the other hard drives. All my ears drives are unjumpered but running unaligned. I was going to transfer the content from one drive to the new one and one by one was going to preclear them with the -A switch. Needless to say this is going to be a very long process so before diving into it I was wondering what kind of tests i can run to see if i am seeing a "performance hit" for not having it aligned?
December 17, 201213 yr Make a lot, e.g. 500,000, of small files and copy them on to an aligned disk and a non-aligned disk. Compare the total read times for all of the files on each drive.
December 17, 201213 yr Make a lot, e.g. 500,000, of small files and copy them on to an aligned disk and a non-aligned disk. Compare the total read times for all of the files on each drive. If that is not how you usually use your server, then leave things as they are. The odds of something going wrong is higher than I like. If you have a SPARE drive, then you can preclear it as desired, then re-construct onto it, preserving your original drive until all is stable. (several days at least) Joe L.
December 17, 201213 yr Author Thanks for the replies. For my usage, it works as I expect it. files get streamed, copied and moved. I don't get a full gigabit speed as per my network but otherwise the rest is good. My new drive is getting precleared with 4k aligned. It's the only disk that will be aligned, so i'm hoping not to see any incompatibility issues between two drives.
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