On 12/20/18 10:55 AM, Luciano ES wrote: > On Thu, 20 Dec 2018 10:10:42 -0600, Eric Sandeen wrote: > >> Well, you have larger inodes on xxbkp for starters. > > I can't make smaller inodes on this disk. > > "specified blocksize 2048 is less than device physical sector size 4096 > switching to logical sector size 512" 1) that's a warning not an error 2) that's blocksize not inode size but ok, I missed that you had 2k blocks on your backup disk.... I don't really know what you're trying to do here, TBH. > another attempt: > > "specified blocksize 2048 is less than device physical sector size 4096 > switching to logical sector size 512 > Minimum inode size for CRCs is 512 bytes" So, I don't think you turned off crcs here. > So yes, it's the CRC feature. So turn it off. > > On Thu, 20 Dec 2018 10:10:42 -0600, Eric Sandeen wrote: > >> # mkfs.xfs -m crc=0,finobt=1 -i sparse=0 -n ftype=0 > > Your command line doesn't work. It says: > > finobt not supported without CRC support yeah I fat-fingered that, make it finobt=0 of course. > I have confirmed that disabling CRC allows me to have smaller inodes, > but I wish I could keep that feature. It sounds like something I want > to have, to improve reliability. > > Is there another way? You're over-constraining yourself here; crcs require larger inodes which requires more space, by definition. Sorry, but you can't get something for nothing. If you are trying to consume identical space you're going to need to use an identical format. -Eric
