Next up - I should determine whether bytes trimmed are still included in bytes written. It will be nice when the bytes trimmed column shows up in iostat but that requires kernel 4.18 or 4.19 per this and with Ubuntu 18.04 (latest LTS) I use 4.15.
This bug report explains the differences.
- rrqm/s and wrqm/s were moved from columns 2, 3 to 6, 7
- avgqu-sz was renamed to aqu-sz
- await was removed - r_await and w_await remain
- avgrq-sz was replaced by rareq-sz and wareq-sz
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