On 01.03.2019 03:56, Bernd Eckenfels wrote: > Hello, > > I think the filesystems address in Logical blocks, so this is the size which should match. > > However the physical size might be relevant for alignment/sizing decisions of mkfs (but you would expect the to be encoded in the metadata of the filesystem so you can transport them (losing proper alignment which might affect Performance or robustness). > > For ext3/4 I think the mkfs will use -b 4k by Default if your FS is at least 0,5GB. That may make a difference. My tests were with relatively small volumes, so it might not be using -b 4k due to the size of the volume? > > BTW: some applications (like SQL Server) also care about the physical size to make sure they always write complete sectors in transactions and avoid read-modify-write scenarios. > > Gruss > Bernd > -- Ingo Franzki eMail: ifranzki@xxxxxxxxxxxxx Tel: ++49 (0)7031-16-4648 Fax: ++49 (0)7031-16-3456 Linux on IBM Z Development, Schoenaicher Str. 220, 71032 Boeblingen, Germany IBM Deutschland Research & Development GmbH / Vorsitzender des Aufsichtsrats: Matthias Hartmann Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294 IBM DATA Privacy Statement: https://www.ibm.com/privacy/us/en/ _______________________________________________ linux-lvm mailing list linux-lvm@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
