January 14, 20233 yr Hi, A quick question : why my drive aren't empty after unraid formated them? After my first unraid build from scratch, the disks were unmountable after I assigned them to create an array (not yet formated from my previous system (truenas core)), so I got the format option, which I did. The drives are not empty and are using 29go, 7go and 14go. I haven't write any data to them.
January 14, 20233 yr Community Expert Solution 37 minutes ago, arnaudcl said: Hi, A quick question : why my drive aren't empty after unraid formated them? After my first unraid build from scratch, the disks were unmountable after I assigned them to create an array (not yet formated from my previous system (truenas core)), so I got the format option, which I did. The drives are not empty and are using 29go, 7go and 14go. I haven't write any data to them. The moment you format a drive you will lose something like 1-2% of the total size as the file system structures are created to hold directory type information.
January 14, 20233 yr Author Hi itimpi, The used space represent 1 to 3% as you mentionned of the 1To (2x) and 2To. Thanks for the explanation. I'm still surprise the empty structure used that much space (50go total), but I can live with that. Edited January 14, 20233 yr by arnaudcl
January 15, 20233 yr Community Expert Just to add that this is filesystem depend, e.g., btrfs doesn't use basically any space compared with xfs since it started supporting reflinks.
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