Parameter 'sps' and 'ops' in item keys vfs.dev.read and vfs.dev.write are not supported for test by Zabbix agent:

1. for i in sectors operations sps ops; do zabbix_get -s localhost -k "vfs.dev.write[,$i]"; done
   187288398
   18817089
   11.600000
   1.083333

1. for i in sectors operations sps ops; do zabbix_agentd -t "vfs.dev.write[,$i]"; done
   vfs.dev.write[all,sectors] [u|187288902]
   vfs.dev.write[all,operations] [u|18817132]
   vfs.dev.write[all,sps] [m|ZBX_NOTSUPPORTED]
   vfs.dev.write[all,ops] [m|ZBX_NOTSUPPORTED]

The item key system.cpu.util is not supported at all for test by Zabbix agent:

1. for i in user nice idle system iowait interrupt softirq steal; do zabbix_get -s localhost -k "system.cpu.util[,$i]"; done
   0.199784
   0.000000
   99.542163
   0.224757
   0.000000
   0.000000
   0.033297
   0.000000

1. for i in user nice idle system iowait interrupt softirq steal; do zabbix_agentd -t "system.cpu.util[,$i]"; done
   system.cpu.util[,user] [m|ZBX_NOTSUPPORTED]
   system.cpu.util[,nice] [m|ZBX_NOTSUPPORTED]
   system.cpu.util[,idle] [m|ZBX_NOTSUPPORTED]
   system.cpu.util[,system] [m|ZBX_NOTSUPPORTED]
   system.cpu.util[,iowait] [m|ZBX_NOTSUPPORTED]
   system.cpu.util[,interrupt] [m|ZBX_NOTSUPPORTED]
   system.cpu.util[,softirq] [m|ZBX_NOTSUPPORTED]
   system.cpu.util[,steal] [m|ZBX_NOTSUPPORTED]