Originally posted by: Carmen.frank

Hi

I want to know what does dac0utm or dac1utm devices mean in iostat output on a AIX machine. I am surprised to see they are listed under disks in iostat output but they don't have a corresponding /dev entries. Are they listed seperatly somewhere else in device tree? Can somebody help me please in finding the answers
Disks: % tm_act Kbps tps Kb_read Kb_wrtn
dac0 0.0 0.0 0.0 0 0
dac0utm 0.0 0.0 0.0 0 0
dac1 0.0 0.0 0.0 0 0
dac1utm 0.0 0.0 0.0 0 0
dac2 0.0 0.0 0.0 0 0
dac2utm 0.0 0.0 0.0 0 0
dac3 0.0 0.0 0.0 0 0
dac3utm 0.0 0.0 0.0 0 0
dac4 0.0 0.0 0.0 0 0
dac4utm 0.0 0.0 0.0 0 0
dac5 0.0 0.0 0.0 0 0
dac5utm 0.0 0.0 0.0 0 0
dac6 0.0 0.0 0.0 0 0
dac6utm 0.0 0.0 0.0 0 0
dac7 0.0 0.0 0.0 0 0
dac7utm 0.0 0.0 0.0 0 0
dac8 0.0 0.0 0.0 0 0
dac8utm 0.0 0.0 0.0 0 0
dac9 0.0 0.0 0.0 0 0
dac9utm 0.0 0.0 0.0 0 0
dac11 0.0 0.0 0.0 0 0
dac11utm 0.0 0.0 0.0 0 0
dac10 0.0 81.7 4.0 2197742 24413505
dac10utm 0.0 0.0 0.0 0 0
#AIX-Forum

Originally posted by: Renaud

Hi,

The UTM device is used for in band management of your storage system, typically you could install a Fast Manager on your AIX, the UTM device is used by the Fast Manager to manage your DS4700.

The LUN number is 31 for UTM, if you don't use the in band management you can ignore this device.
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