With IPHost Network Monitor you can run simple snmp requests against a Dell device in your network.
ldIOWritesPerSec
ld IO Writes Per Sec
1.3.6.1.4.1.16.1.1.2.1.15
Number of IO Writes/sec Statistics for this Logical Drive.
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IPHost Network monitor allows you to monitor ldIOWritesPerSec on Dell device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Dell switches right now.