root@berlin ~# /gnu/store/3b93ymqrli3aa4zfiqhvhz02b493c40a-sysstat-12.4.3/bin/iostat -x sdb
Linux 5.9.12-gnu (berlin.guix.gnu.org)  12/10/21        _x86_64_        (96 CPU)
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avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           5.57    0.17    0.60    0.99    0.00   92.68
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Device            r/s     rkB/s   rrqm/s  %rrqm r_await rareq-sz     w/s     wkB/s   wrqm/s  %wrqm w_await wareq-sz     d/s     dkB/s   drqm/s  %drqm d_await dareq-sz     f/s f_await  aqu-sz  %util
sdb             79.59   2728.01   158.87  66.62    0.27    34.28  205.86   4447.14   302.75  59.53    0.34    21.60    0.00      0.00     0.00   0.00    0.00     0.00    0.35    0.10    0.09  12.99
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Generated by Ricardo Wurmus using scpaste at Fri Dec 10 10:05:33 2021. UTC. (original)