capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
ost0        1.92M  40.0T      0      6      0  23.8K
ost0        46.3G  40.0T      0  1.59K      0   588M
ost0        90.5G  39.9T     88  2.34K   355K   566M
ost0         126G  39.9T    328  1.98K  1.28M   462M
ost0         164G  39.8T    256  2.27K  1.00M   440M