Is it possible to adjust the I/O block size of a filesystem after creating it? e.g. stat command shows I/O block size, which is retrieved from stat->st_blksize (Optimal block size for I/O). On my RH9, the block size is 4096. How this number was initially set? How to adjust it (or is it possible to adjust it?) I don't see interface in sysctl . Regards, Shan Jing Enterprise Services Unix Group - New York Chief Technology Office (CTO) Global Technology and Operations(GTO) Deutsche Bank Desk: +1-973-682-3463 Cell: +1-201-456-9795 -- This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. -- Shrike-list mailing list Shrike-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/shrike-list