October 31, 2025Oct 31 Hello,I've added brand new freshly formatted 14 TB drives to an empty array.Why do they show very different amounts of the file system overhead?Ironwolf Pro's show 97 GBs,the Exos - 268 GBsIronwolf's have been added a while ago, but the Exos has just been added today after upgrading to 7.2.0All three HDDs have been shucked, therefore I'd assumed they came from the store pre-formatted with exFAT. Edited October 31, 2025Oct 31 by Carraya
October 31, 2025Oct 31 Community Expert Solution 25 minutes ago, Carraya said:Why do they show very different amounts of the file system overhead?Disk1 and disk2 were likely formatted with an older kernel; normal overhead for XFS with current kernels is around 20GB per TB.
October 31, 2025Oct 31 Author 8 minutes ago, JorgeB said:Disk1 and disk2 were likely formatted with an older kernel; normal overhead for XFS with current kernels is around 20GB per TB.Do you see any potential issues arising from the situation?Should I reformat the Ironwolfs to streamline the overall formatting among the drives?I haven't transferred any data to the array yet.
October 31, 2025Oct 31 Community Expert As long as they are v5 it shouldn't cause any issues, but it won't hurt to reformat, and the extra overhead may have benefits, I assume.
October 31, 2025Oct 31 Author May I ask how to do that? (reformat)I've unassigned the disks, created a new configuration and restarted the array.Everything has remained the same.
October 31, 2025Oct 31 Community Expert Start the array in maintenance mode, click on disk1 and then "erase," do the same for disk2, then start the array in normal mode, and you can format them.
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