diff --git a/pkg/monitor-hw/cmd/dell.go b/pkg/monitor-hw/cmd/dell.go
index 5658755..f5f2842 100644
--- a/pkg/monitor-hw/cmd/dell.go
+++ b/pkg/monitor-hw/cmd/dell.go
@@ -2,10 +2,7 @@ package cmd
 
 import (
 	"context"
-	"os"
-	"time"
 
-	"github.com/cybozu-go/log"
 	"github.com/cybozu-go/well"
 )
 
@@ -13,35 +10,7 @@ func monitorDell(ctx context.Context) error {
 	if err := initDell(ctx); err != nil {
 		return err
 	}
-	if err := resetDell(ctx); err != nil {
-		return err
-	}
-
-	env := well.NewEnvironment(ctx)
-	env.Go(func(ctx context.Context) error {
-		for {
-			select {
-			case <-time.After(time.Duration(opts.resetInterval) * time.Hour):
-			case <-ctx.Done():
-				return nil
-			}
-
-			if _, err := os.Stat(opts.noResetFile); err == nil {
-				// if no-reset file exists, skip reset.
-				continue
-			}
-
-			if err := resetDell(ctx); err != nil {
-				log.Error("failed to reset iDRAC", map[string]interface{}{
-					log.FnError: err,
-				})
-				// continue working
-			}
-		}
-	})
-
-	env.Stop()
-	return env.Wait()
+	return resetDell(ctx)
 }
 
 func initDell(ctx context.Context) error {
diff --git a/pkg/monitor-hw/cmd/root.go b/pkg/monitor-hw/cmd/root.go
index 0bd3065..3bbc3ac 100644
--- a/pkg/monitor-hw/cmd/root.go
+++ b/pkg/monitor-hw/cmd/root.go
@@ -24,7 +24,6 @@ const (
 	defaultAddress       = ":9105"
 	defaultInterval      = 60
 	defaultResetInterval = 24
-	defaultNoReset       = "/var/lib/setup-hw/no-reset"
 )
 
 // rootCmd represents the base command when called without any subcommands
@@ -126,5 +125,4 @@ func init() {
 	rootCmd.Flags().StringVar(&opts.listenAddress, "listen", defaultAddress, "listening address and port number")
 	rootCmd.Flags().IntVar(&opts.interval, "interval", defaultInterval, "interval of collecting metrics in seconds")
 	rootCmd.Flags().IntVar(&opts.resetInterval, "reset-interval", defaultResetInterval, "interval of resetting iDRAC in hours (dell servers only)")
-	rootCmd.Flags().StringVar(&opts.noResetFile, "no-reset", defaultNoReset, "path of the no-reset file")
 }