diff --git a/pkg/cmd/roachtest/spec/cluster_spec.go b/pkg/cmd/roachtest/spec/cluster_spec.go
index 6bbdf3a06f57..2a9d20ecf2b4 100644
--- a/pkg/cmd/roachtest/spec/cluster_spec.go
+++ b/pkg/cmd/roachtest/spec/cluster_spec.go
@@ -173,6 +173,11 @@ func (s *ClusterSpec) Args(extra ...string) ([]string, error) {
 		switch s.Cloud {
 		case GCE:
 			args = append(args, fmt.Sprintf("--gce-local-ssd-count=%d", s.SSDs))
+
+			// NB: As the default behavior for roachprod (at least in AWS/GCP) is to mount multiple disks as a single
+			// store using a RAID 0 array, we must explicitly ask for multiple stores to be enabled.  If a use case for
+			// using a RAID 0 array arises in roachtest, it can be added as an option in the ClusterSpec.
+			args = append(args, "--gce-enable-multiple-stores=true")
 		default:
 			return nil, errors.Errorf("specifying SSD count is not yet supported on %s", s.Cloud)
 		}
diff --git a/pkg/cmd/roachtest/spec/testdata/collected_specs.txt b/pkg/cmd/roachtest/spec/testdata/collected_specs.txt
index f87eb14555f4..e0045918e770 100644
--- a/pkg/cmd/roachtest/spec/testdata/collected_specs.txt
+++ b/pkg/cmd/roachtest/spec/testdata/collected_specs.txt
@@ -49,13 +49,13 @@ print-args-for-all
 24: spec.ClusterSpec{Cloud:"gce", InstanceType:"", NodeCount:9, CPUs:1, SSDs:0, VolumeSize:0, PreferLocalSSD:true, Zones:"", Geo:false, Lifetime:43200000000000, ReusePolicy:spec.ReusePolicyAny{}, FileSystem:0, RandomlyUseZfs:false}
   --clouds=gce --local-ssd=true --gce-machine-type=n1-standard-1 --lifetime=12h0m0s
 25: spec.ClusterSpec{Cloud:"gce", InstanceType:"", NodeCount:6, CPUs:32, SSDs:2, VolumeSize:0, PreferLocalSSD:true, Zones:"", Geo:false, Lifetime:43200000000000, ReusePolicy:spec.ReusePolicyAny{}, FileSystem:0, RandomlyUseZfs:false}
-  --clouds=gce --local-ssd=true --gce-machine-type=n1-highcpu-32 --gce-local-ssd-count=2 --lifetime=12h0m0s
+  --clouds=gce --local-ssd=true --gce-machine-type=n1-highcpu-32 --gce-local-ssd-count=2 --gce-enable-multiple-stores=true --lifetime=12h0m0s
 26: spec.ClusterSpec{Cloud:"gce", InstanceType:"", NodeCount:10, CPUs:16, SSDs:0, VolumeSize:0, PreferLocalSSD:true, Zones:"", Geo:false, Lifetime:43200000000000, ReusePolicy:spec.ReusePolicyAny{}, FileSystem:0, RandomlyUseZfs:false}
   --clouds=gce --local-ssd=true --gce-machine-type=n1-highcpu-16 --lifetime=12h0m0s
 27: spec.ClusterSpec{Cloud:"gce", InstanceType:"", NodeCount:4, CPUs:96, SSDs:0, VolumeSize:0, PreferLocalSSD:true, Zones:"", Geo:false, Lifetime:43200000000000, ReusePolicy:spec.ReusePolicyAny{}, FileSystem:0, RandomlyUseZfs:false}
   --clouds=gce --local-ssd=true --gce-machine-type=n1-highcpu-96 --lifetime=12h0m0s
 28: spec.ClusterSpec{Cloud:"gce", InstanceType:"", NodeCount:4, CPUs:4, SSDs:1, VolumeSize:0, PreferLocalSSD:true, Zones:"", Geo:false, Lifetime:43200000000000, ReusePolicy:spec.ReusePolicyAny{}, FileSystem:0, RandomlyUseZfs:false}
-  --clouds=gce --local-ssd=true --gce-machine-type=n1-standard-4 --gce-local-ssd-count=1 --lifetime=12h0m0s
+  --clouds=gce --local-ssd=true --gce-machine-type=n1-standard-4 --gce-local-ssd-count=1 --gce-enable-multiple-stores=true --lifetime=12h0m0s
 29: spec.ClusterSpec{Cloud:"gce", InstanceType:"", NodeCount:2, CPUs:8, SSDs:0, VolumeSize:0, PreferLocalSSD:true, Zones:"", Geo:false, Lifetime:43200000000000, ReusePolicy:spec.ReusePolicyAny{}, FileSystem:0, RandomlyUseZfs:false}
   --clouds=gce --local-ssd=true --gce-machine-type=n1-standard-8 --lifetime=12h0m0s
 30: spec.ClusterSpec{Cloud:"gce", InstanceType:"", NodeCount:8, CPUs:4, SSDs:0, VolumeSize:0, PreferLocalSSD:true, Zones:"", Geo:false, Lifetime:43200000000000, ReusePolicy:spec.ReusePolicyAny{}, FileSystem:0, RandomlyUseZfs:false}
diff --git a/pkg/roachprod/vm/aws/aws.go b/pkg/roachprod/vm/aws/aws.go
index 915e141e8589..fa999b5c8ffe 100644
--- a/pkg/roachprod/vm/aws/aws.go
+++ b/pkg/roachprod/vm/aws/aws.go
@@ -301,7 +301,7 @@ func (o *ProviderOpts) ConfigureCreateFlags(flags *pflag.FlagSet) {
 	flags.StringVar(&o.ImageAMI, ProviderName+"-image-ami",
 		o.ImageAMI, "Override image AMI to use.  See https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/describe-images.html")
 	flags.BoolVar(&o.UseMultipleDisks, ProviderName+"-enable-multiple-stores",
-		o.UseMultipleDisks, "Enable the use of multiple stores by creating one store directory per disk. "+
+		false, "Enable the use of multiple stores by creating one store directory per disk. "+
 			"Default is to raid0 stripe all disks. "+
 			"See repeating --"+ProviderName+"-ebs-volume for adding extra volumes.")
 	flags.Float64Var(&o.CreateRateLimit, ProviderName+"-create-rate-limit", o.CreateRateLimit, "aws"+
diff --git a/pkg/roachprod/vm/aws/support.go b/pkg/roachprod/vm/aws/support.go
index 570d72fa552f..99931048b6ac 100644
--- a/pkg/roachprod/vm/aws/support.go
+++ b/pkg/roachprod/vm/aws/support.go
@@ -52,7 +52,7 @@ mount_prefix="/mnt/data"
 for d in $(ls /dev/nvme?n1 /dev/xvdd); do
   if ! mount | grep ${d}; then
     disks+=("${d}")
-    echo "Disk ${d} not mounted, creating..."
+    echo "Disk ${d} not mounted, need to mount..."
   else
     echo "Disk ${d} already mounted, skipping..."
   fi
@@ -70,7 +70,7 @@ elif [ "${#disks[@]}" -eq "1" ] || [ -n "$use_multiple_disks" ]; then
   do
     mountpoint="${mount_prefix}${disknum}"
     disknum=$((disknum + 1 ))
-    echo "Creating ${mountpoint}"
+    echo "Mounting ${disk} at ${mountpoint}"
     mkdir -p ${mountpoint}
     mkfs.ext4 -F ${disk}
     mount -o ${mount_opts} ${disk} ${mountpoint}
diff --git a/pkg/roachprod/vm/gce/gcloud.go b/pkg/roachprod/vm/gce/gcloud.go
index 76d707a571e0..1672f44fcb12 100644
--- a/pkg/roachprod/vm/gce/gcloud.go
+++ b/pkg/roachprod/vm/gce/gcloud.go
@@ -303,7 +303,7 @@ func (o *ProviderOpts) ConfigureCreateFlags(flags *pflag.FlagSet) {
 	flags.IntVar(&o.PDVolumeSize, ProviderName+"-pd-volume-size", 500,
 		"Size in GB of persistent disk volume, only used if local-ssd=false")
 	flags.BoolVar(&o.UseMultipleDisks, ProviderName+"-enable-multiple-stores",
-		o.UseMultipleDisks, "Enable the use of multiple stores by creating one store directory per disk. "+
+		false, "Enable the use of multiple stores by creating one store directory per disk. "+
 			"Default is to raid0 stripe all disks.")
 
 	flags.StringSliceVar(&o.Zones, ProviderName+"-zones", nil,
diff --git a/pkg/roachprod/vm/gce/utils.go b/pkg/roachprod/vm/gce/utils.go
index b80b12b237cf..78d9b42fed0f 100644
--- a/pkg/roachprod/vm/gce/utils.go
+++ b/pkg/roachprod/vm/gce/utils.go
@@ -73,7 +73,7 @@ for d in $(ls /dev/disk/by-id/google-local-* /dev/disk/by-id/google-persistent-d
   if ! mount | grep ${d}; then
 {{ end }}
     disks+=("${d}")
-    echo "Disk ${d} not mounted, creating..."
+    echo "Disk ${d} not mounted, need to mount..."
   else
     echo "Disk ${d} already mounted, skipping..."
   fi
@@ -90,7 +90,7 @@ elif [ "${#disks[@]}" -eq "1" ] || [ -n "$use_multiple_disks" ]; then
   do
     mountpoint="${mount_prefix}${disknum}"
     disknum=$((disknum + 1 ))
-    echo "Creating ${mountpoint}"
+    echo "Mounting ${disk} at ${mountpoint}"
     mkdir -p ${mountpoint}
 {{ if .Zfs }}
     zpool create -f $(basename $mountpoint) -m ${mountpoint} ${disk}
@@ -98,7 +98,7 @@ elif [ "${#disks[@]}" -eq "1" ] || [ -n "$use_multiple_disks" ]; then
 {{ else }}
     mkfs.ext4 -q -F ${disk}
     mount -o ${mount_opts} ${disk} ${mountpoint}
-    echo "/dev/md0 ${mountpoint} ext4 ${mount_opts} 1 1" | tee -a /etc/fstab
+    echo "${d} ${mountpoint} ext4 ${mount_opts} 1 1" | tee -a /etc/fstab
 {{ end }}
     chmod 777 ${mountpoint}
   done