June 7, 201511 yr I just upgraded my array with a new 5tb drive. Here are the steps I took: 1: Unassigned Current 4TB parity drive. 2. Add old 4TB parity Drive to array. 3. Format old 4TB parity drive to xfs. >>> Now, this all seems to have gone smoothly, and my next step was going to be to add the new 5TB drive as my parity disk and let it build parity, but the 4TB drive is reporting 1.99GB used space, w/ 4TB free. Why is that? Will that cause any problems down the line?
June 7, 201511 yr Author I reformatted as reiserfs and it reported disk space as 154MB used. Tried again with XFS and back to 1.99gb usage. Here is the diagnostics report. tower-diagnostics-20150607-1124.zip
June 7, 201511 yr Author I realized that while 1.99GB seems like a lot of used space for a freshly formatted drive, it is only .05% of disk space on a 4TB drive. Perhaps that is normal for the file system?
June 7, 201511 yr unRaid reports disk usage by subtracting the amount of free space reported by the file system from the total raw capacity of the device. Therefore 'used' is going to reflect all partitioning and file system overhead, that is, a true accounting of how much space is 'used' on the device. xfs just preallocates more metadata, nothing to see here...
June 7, 201511 yr ... but the 4TB drive is reporting 1.99GB used space, w/ 4TB free. Why is that? Will that cause any problems down the line? Nothing wrong with that => 1.99GB is less than 2/4000ths of the drive ... so there's actually 3.998TB left, which simply rounds to 4TB
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