# How to exclude a specific disk on a single host in a custom metric event?

**URL:** <https://community.dynatrace.com/t/how-to-exclude-a-specific-disk-on-a-single-host-in-a-custom-metric-event/54795>\
**Category:** Dashboarding\
**Tags:** dynatrace-managed\
**Created:** [January 29, 2026, 11:39am UTC](https://community.dynatrace.com/t/how-to-exclude-a-specific-disk-on-a-single-host-in-a-custom-metric-event/54795 "2026-01-29T11:39:40Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Vijayt](https://avatars.discourse-cdn.com/v4/letter/v/e9bcb4/32.png) [@Vijayt](https://community.dynatrace.com/u/Vijayt)\
**Post date:** [January 29, 2026, 11:39am UTC](https://community.dynatrace.com/t/how-to-exclude-a-specific-disk-on-a-single-host-in-a-custom-metric-event/54795/1 "2026-01-29T11:39:40Z")

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Hi

I have custom metric event with filtering host multiple conditions for disk event .

i want to exclude one disk for one server.&nbsp; host abc mountpoint /disk1

builtin:host.disk.usedPct:filter(and(  
or(in(“dt.entity.host”,entitySelector(“type(host),osType(~“LINUX~”)”))),  
or(not(in(“dt.entity.host”,entitySelector(“type(host),tag(~“team:bx\_unix~”)”))))  
)):splitBy(“dt.entity.host”,“dt.entity.disk”)

how can i achieve that . one way is to tag disk and exclude disk in filter .

but how can i separate in metric key&nbsp; .&nbsp; &nbsp;i can filter via tag but i can filter only via&nbsp; host tag not disk ?

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**Author:** ![rastislav\_danis](https://avatars.discourse-cdn.com/v4/letter/r/b9bd4f/32.png) [@rastislav\_danis](https://community.dynatrace.com/u/rastislav_danis)\
**Post date:** [January 29, 2026, 12:44pm UTC](https://community.dynatrace.com/t/how-to-exclude-a-specific-disk-on-a-single-host-in-a-custom-metric-event/54795/2 "2026-01-29T12:44:04Z")

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you can try (show all except specific disk “diskname” on host “hostname”:

builtin:host.disk.usedPct:filter(or(not(in(“dt.entity.disk”,entitySelector(“type(disk),entityName.equals(~”/diskname~“)”))),not(in(“dt.entity.host”,entitySelector(“type(host),entityName.equals(~“hostname~”)”)))))::splitBy(“dt.entity.host”,“dt.entity.disk”)

btw, this is not DQL query, but classic metric query

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<div class="post-metadata">

**Author:** ![Vijayt](https://avatars.discourse-cdn.com/v4/letter/v/e9bcb4/32.png) [@Vijayt](https://community.dynatrace.com/u/Vijayt)\
**Post date:** [January 29, 2026, 12:49pm UTC](https://community.dynatrace.com/t/how-to-exclude-a-specific-disk-on-a-single-host-in-a-custom-metric-event/54795/3 "2026-01-29T12:49:12Z")

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yes i can exclude it by tagging disk and filter via disk tag . but is there any option available in “metric key” type events&nbsp; with entity filter.&nbsp; The reason why i am asking is by this classic query my "metric selector " events limits exceeded

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<div class="post-metadata">

**Author:** ![rastislav\_danis](https://avatars.discourse-cdn.com/v4/letter/r/b9bd4f/32.png) [@rastislav\_danis](https://community.dynatrace.com/u/rastislav_danis)\
**Post date:** [January 29, 2026, 1:12pm UTC](https://community.dynatrace.com/t/how-to-exclude-a-specific-disk-on-a-single-host-in-a-custom-metric-event/54795/4 "2026-01-29T13:12:13Z")

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if you are forced to use metric selector metric event, you can use dimension filter to exclude disk from event definition

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<div class="post-metadata">

**Author:** ![Vijayt](https://avatars.discourse-cdn.com/v4/letter/v/e9bcb4/32.png) [@Vijayt](https://community.dynatrace.com/u/Vijayt)\
**Post date:** [January 29, 2026, 1:17pm UTC](https://community.dynatrace.com/t/how-to-exclude-a-specific-disk-on-a-single-host-in-a-custom-metric-event/54795/5 "2026-01-29T13:17:41Z")

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yeah good idea. but dimention filter does have tag one . it required&nbsp; exact name/id equal / not equal ones

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<div class="post-metadata">

**Author:** ![rastislav\_danis](https://avatars.discourse-cdn.com/v4/letter/r/b9bd4f/32.png) [@rastislav\_danis](https://community.dynatrace.com/u/rastislav_danis)\
**Post date:** [January 29, 2026, 1:51pm UTC](https://community.dynatrace.com/t/how-to-exclude-a-specific-disk-on-a-single-host-in-a-custom-metric-event/54795/6 "2026-01-29T13:51:33Z")

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there is a lot of limitations in metric key defined metric events..