fix: Display available memory (#926)

compose.yml

@@ -1,7 +1,7 @@
 services:
   dsm:
     container_name: dsm
-        image: vdsm/virtual-dsm:latest
+    image: vdsm/virtual-dsm
     environment:
       DISK_SIZE: "16G"
     devices:
@@ -12,5 +12,6 @@ services:
     ports:
       - 5000:5000
     volumes:
-            - /var/dsm:/storage
+      - ./dsm:/storage
+    restart: always
     stop_grace_period: 2m

kubernetes.yml

@@ -10,25 +10,32 @@ spec:
     requests:
       storage: 16Gi
 ---
-apiVersion: v1
-kind: Pod
+apiVersion: apps/v1
+kind: Deployment
 metadata:
   name: dsm
   labels:
     name: dsm
 spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: dsm
+  template:
+    metadata:
+      labels:
+        app: dsm
+    spec:
       containers:
       - name: dsm
         image: vdsm/virtual-dsm
         env:
-    - name: RAM_SIZE
-      value: "1G"
-    - name: CPU_CORES
-      value: "1"
         - name: DISK_SIZE
           value: "16G"
         ports:
           - containerPort: 5000
+            name: http
+            protocol: TCP
         securityContext:
           capabilities:
             add:
@@ -59,9 +66,12 @@ kind: Service
 metadata:
   name: dsm
 spec:
+  internalTrafficPolicy: Cluster
   ports:
-  - name: tcp-5000
+    - name: http
       port: 5000
+      protocol: TCP
+      targetPort: 5000
   selector:
-    name: dsm
-  type: NodePort
+    app: dsm
+  type: ClusterIP

readme.md

@@ -39,7 +39,7 @@ services:
     ports:
       - 5000:5000
     volumes:
-      - /var/dsm:/storage
+      - ./dsm:/storage
     restart: always
     stop_grace_period: 2m
 ```
@@ -47,7 +47,7 @@ services:
 Via Docker CLI:
 
 ```bash
-docker run -it --rm -p 5000:5000 --device=/dev/kvm --device=/dev/net/tun --cap-add NET_ADMIN --stop-timeout 120 vdsm/virtual-dsm
+docker run -it --rm --name dsm -p 5000:5000 --device=/dev/kvm --device=/dev/net/tun --cap-add NET_ADMIN -v ${PWD:-.}/dsm:/storage --stop-timeout 120 vdsm/virtual-dsm
 ```
 
 Via Kubernetes:
@@ -84,10 +84,10 @@ kubectl apply -f https://raw.githubusercontent.com/vdsm/virtual-dsm/refs/heads/m
 
   ```yaml
   volumes:
-    - /var/dsm:/storage
+    - ./dsm:/storage
   ```
 
-  Replace the example path `/var/dsm` with the desired storage folder.
+  Replace the example path `./dsm` with the desired storage folder or named volume.
  
 ### How do I change the size of the disk?
 
@@ -112,9 +112,6 @@ kubectl apply -f https://raw.githubusercontent.com/vdsm/virtual-dsm/refs/heads/m
     DISK_FMT: "qcow2"
   ```
 
-> [!NOTE]
-> This may reduce the write performance of the disk.
-
 ### How do I add multiple disks?
 
   To create additional disks, modify your compose file like this:
@@ -124,8 +121,8 @@ kubectl apply -f https://raw.githubusercontent.com/vdsm/virtual-dsm/refs/heads/m
     DISK2_SIZE: "32G"
     DISK3_SIZE: "64G"
   volumes:
-    - /home/example:/storage2
-    - /mnt/data/example:/storage3
+    - ./example2:/storage2
+    - ./example3:/storage3
   ```
 
 ### How do I pass-through a disk?
@@ -245,19 +242,19 @@ kubectl apply -f https://raw.githubusercontent.com/vdsm/virtual-dsm/refs/heads/m
     - /dev/dri
   ```
 
-> [!TIP]
-> This can be used to enable the facial recognition function in Synology Photos for example.
+> [!NOTE]
+> This can be used to enable the facial recognition function in Synology Photos, but does not provide hardware transcoding for video.
 
 ### How do I install a specific version of vDSM?
 
-  By default, version 7.2 will be installed, but if you prefer an older version, you can add its download URL to your compose file as follows:
+  By default, version 7.2 will be installed, but if you prefer an older version, you can add the download URL of the `.pat` file to your compose file as follows:
 
   ```yaml
   environment:
     URL: "https://global.synologydownload.com/download/DSM/release/7.0.1/42218/DSM_VirtualDSM_42218.pat"
   ```
 
-  With this method, it is even possible to switch between different versions while keeping all your file data intact.
+  With this method, it is even possible to switch back and forth between versions while keeping your file data intact.
 
   If you don't have internet access, it's also possible to skip the download by setting URL to:
 
@@ -266,12 +263,20 @@ kubectl apply -f https://raw.githubusercontent.com/vdsm/virtual-dsm/refs/heads/m
     URL: "DSM_VirtualDSM_42218.pat"
   ```
 
-  after placing a file called `DSM_VirtualDSM_42218.pat` in your `/storage` folder.
+  after placing a copy of [DSM_VirtualDSM_42218.pat](https://global.synologydownload.com/download/DSM/release/7.0.1/42218/DSM_VirtualDSM_42218.pat) in the root of your `/storage` folder.
 
 ### What are the differences compared to the standard DSM?
 
   There are only two minor differences: the Virtual Machine Manager package is not available, and Surveillance Station will not include any free licenses.
 
+### How do I run Windows in a container?
+
+  You can use [dockur/windows](https://github.com/dockur/windows) for that. It shares many of the same features, and even has completely automatic installation.
+
+### How do I run a Linux desktop in a container?
+
+  You can use [qemus/qemu](https://github.com/qemus/qemu) in that case.
+
 ### Is this project legal?
 
   Yes, this project contains only open-source code and does not distribute any copyrighted material. Neither does it try to circumvent any copyright protection measures. So under all applicable laws, this project will be considered legal. 

src/config.sh

@@ -17,15 +17,21 @@ ARGS=$(echo "$ARGS" | sed 's/\t/ /g' | tr -s ' ')
 if [[ "$RAM_CHECK" != [Nn]* ]]; then
 
   RAM_AVAIL=$(free -b | grep -m 1 Mem: | awk '{print $7}')
-  AVAIL_GB=$(( RAM_AVAIL/1073741824 ))
+  AVAIL_MEM=$(formatBytes "$RAM_AVAIL")
 
   if (( (RAM_WANTED + RAM_SPARE) > RAM_AVAIL )); then
-    error "Your configured RAM_SIZE of $WANTED_GB GB is too high for the $AVAIL_GB GB of memory available, please set a lower value."
-    exit 17
-  fi
-
+    msg="Your configured RAM_SIZE of ${RAM_SIZE/G/ GB} is too high for the $AVAIL_MEM of memory available, please set a lower value."
+    [[ "${FS,,}" != "zfs" ]] && error "$msg" && exit 17
+    info "$msg"
+  else
     if (( (RAM_WANTED + (RAM_SPARE * 3)) > RAM_AVAIL )); then
-    warn "your configured RAM_SIZE of $WANTED_GB GB is very close to the $AVAIL_GB GB of memory available, please consider a lower value."
+      msg="your configured RAM_SIZE of ${RAM_SIZE/G/ GB} is very close to the $AVAIL_MEM of memory available, please consider a lower value."
+      if [[ "${FS,,}" != "zfs" ]]; then
+        warn "$msg"
+      else
+        info "$msg"
+      fi
+    fi
   fi
 
 fi

src/disk.sh

@@ -96,7 +96,7 @@ createDisk() {
   local DISK_DESC=$3
   local DISK_FMT=$4
   local FS=$5
-  local DATA_SIZE DIR SPACE FA
+  local DATA_SIZE DIR SPACE GB FA
 
   DATA_SIZE=$(numfmt --from=iec "$DISK_SPACE")
 
@@ -109,16 +109,16 @@ createDisk() {
     SPACE=$(df --output=avail -B 1 "$DIR" | tail -n 1)
 
     if (( DATA_SIZE > SPACE )); then
-      local SPACE_GB=$(( (SPACE + 1073741823)/1073741824 ))
-      error "Not enough free space to create a $DISK_DESC of $DISK_SPACE in $DIR, it has only $SPACE_GB GB available..."
+      GB=$(formatBytes "$SPACE")
+      error "Not enough free space to create a $DISK_DESC of ${DISK_SPACE/G/ GB} in $DIR, it has only $GB available..."
       error "Please specify a smaller ${DISK_DESC^^}_SIZE or disable preallocation by setting ALLOCATE=N." && exit 76
     fi
   fi
 
   html "Creating a $DISK_DESC image..."
-  info "Creating a $DISK_SPACE $DISK_STYLE $DISK_DESC image in $DISK_FMT format..."
+  info "Creating a ${DISK_SPACE/G/ GB} $DISK_STYLE $DISK_DESC image in $DISK_FMT format..."
 
-  local FAIL="Could not create a $DISK_STYLE $DISK_FMT $DISK_DESC image of $DISK_SPACE ($DISK_FILE)"
+  local FAIL="Could not create a $DISK_STYLE $DISK_FMT $DISK_DESC image of ${DISK_SPACE/G/ GB} ($DISK_FILE)"
 
   case "${DISK_FMT,,}" in
     raw)
@@ -180,7 +180,7 @@ resizeDisk() {
   local DISK_DESC=$3
   local DISK_FMT=$4
   local FS=$5
-  local CUR_SIZE DATA_SIZE DIR SPACE
+  local CUR_SIZE DATA_SIZE DIR SPACE GB
 
   CUR_SIZE=$(getSize "$DISK_FILE")
   DATA_SIZE=$(numfmt --from=iec "$DISK_SPACE")
@@ -194,17 +194,17 @@ resizeDisk() {
     SPACE=$(df --output=avail -B 1 "$DIR" | tail -n 1)
 
     if (( REQ > SPACE )); then
-      local SPACE_GB=$(( (SPACE + 1073741823)/1073741824 ))
-      error "Not enough free space to resize $DISK_DESC to $DISK_SPACE in $DIR, it has only $SPACE_GB GB available.."
+      GB=$(formatBytes "$SPACE")
+      error "Not enough free space to resize $DISK_DESC to ${DISK_SPACE/G/ GB} in $DIR, it has only $GB available.."
       error "Please specify a smaller ${DISK_DESC^^}_SIZE or disable preallocation by setting ALLOCATE=N." && exit 74
     fi
   fi
 
-  local GB=$(( (CUR_SIZE + 1073741823)/1073741824 ))
-  MSG="Resizing $DISK_DESC from ${GB}G to $DISK_SPACE..."
+  GB=$(formatBytes "$CUR_SIZE")
+  MSG="Resizing $DISK_DESC from $GB to ${DISK_SPACE/G/ GB}..."
   info "$MSG" && html "$MSG"
 
-  local FAIL="Could not resize the $DISK_STYLE $DISK_FMT $DISK_DESC image from ${GB}G to $DISK_SPACE ($DISK_FILE)"
+  local FAIL="Could not resize the $DISK_STYLE $DISK_FMT $DISK_DESC image from ${GB} to ${DISK_SPACE/G/ GB} ($DISK_FILE)"
 
   case "${DISK_FMT,,}" in
     raw)
@@ -257,7 +257,7 @@ convertDisk() {
 
   if [[ "$ALLOCATE" != [Nn]* ]]; then
 
-    local DIR CUR_SIZE SPACE
+    local DIR CUR_SIZE SPACE GB
 
     # Check free diskspace
     DIR=$(dirname "$TMP_FILE")
@@ -265,8 +265,8 @@ convertDisk() {
     SPACE=$(df --output=avail -B 1 "$DIR" | tail -n 1)
 
     if (( CUR_SIZE > SPACE )); then
-      local SPACE_GB=$(( (SPACE + 1073741823)/1073741824 ))
-      error "Not enough free space to convert $DISK_DESC to $DST_FMT in $DIR, it has only $SPACE_GB GB available..."
+      GB=$(formatBytes "$SPACE")
+      error "Not enough free space to convert $DISK_DESC to $DST_FMT in $DIR, it has only $GB available..."
       error "Please free up some disk space or disable preallocation by setting ALLOCATE=N." && exit 76
     fi
   fi
@@ -416,7 +416,7 @@ addDisk () {
   local DISK_FMT=$7
   local DISK_IO=$8
   local DISK_CACHE=$9
-  local DISK_EXT DIR DATA_SIZE FS PREV_FMT PREV_EXT CUR_SIZE
+  local DISK_EXT DIR SPACE DATA_SIZE FS PREV_FMT PREV_EXT CUR_SIZE
 
   DISK_EXT=$(fmt2ext "$DISK_FMT")
   local DISK_FILE="$DISK_BASE.$DISK_EXT"
@@ -424,15 +424,17 @@ addDisk () {
   DIR=$(dirname "$DISK_FILE")
   [ ! -d "$DIR" ] && return 0
 
-  [ -z "$DISK_SPACE" ] && DISK_SPACE="16G"
-  DISK_SPACE=$(echo "${DISK_SPACE^^}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
-  [[ -z "${DISK_SPACE//[0-9]}" ]] && DISK_SPACE="${DISK_SPACE}G"
-  DATA_SIZE=$(numfmt --from=iec "$DISK_SPACE")
+  SPACE="${DISK_SPACE// /}"
+  [ -z "$SPACE" ] && SPACE="16G"
+  [ -z "${SPACE//[0-9. ]}" ] && SPACE="${SPACE}G"
+  SPACE=$(echo "${SPACE^^}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
 
-  if (( DATA_SIZE < 1 )); then
+  if ! numfmt --from=iec "$SPACE" &>/dev/null; then
     error "Invalid value for ${DISK_DESC^^}_SIZE: $DISK_SPACE" && exit 73
   fi
 
+  DATA_SIZE=$(numfmt --from=iec "$SPACE")
+
   if (( DATA_SIZE < 6442450944 )); then
     error "Please increase ${DISK_DESC^^}_SIZE to at least 6 GB." && exit 73
   fi
@@ -465,12 +467,12 @@ addDisk () {
     CUR_SIZE=$(getSize "$DISK_FILE")
 
     if (( DATA_SIZE > CUR_SIZE )); then
-      resizeDisk "$DISK_FILE" "$DISK_SPACE" "$DISK_DESC" "$DISK_FMT" "$FS" || exit $?
+      resizeDisk "$DISK_FILE" "$SPACE" "$DISK_DESC" "$DISK_FMT" "$FS" || exit $?
     fi
 
   else
 
-    createDisk "$DISK_FILE" "$DISK_SPACE" "$DISK_DESC" "$DISK_FMT" "$FS" || exit $?
+    createDisk "$DISK_FILE" "$SPACE" "$DISK_DESC" "$DISK_FMT" "$FS" || exit $?
 
   fi
 

src/install.sh

@@ -85,9 +85,9 @@ else
   TMP="/tmp/dsm"
   TMP_SPACE=2147483648
   SPACE=$(df --output=avail -B 1 /tmp | tail -n 1)
-  SPACE_MB=$(( (SPACE + 1048575)/1048576 ))
+  SPACE_MB=$(formatBytes "$SPACE")
   if (( TMP_SPACE > SPACE )); then
-    error "Not enough free space inside the container, have $SPACE_MB MB available but need at least 2 GB." && exit 93
+    error "Not enough free space inside the container, have $SPACE_MB available but need at least 2 GB." && exit 93
   fi
 fi
 
@@ -96,13 +96,13 @@ rm -rf "$TMP" && mkdir -p "$TMP"
 # Check free diskspace
 ROOT_SPACE=536870912
 SPACE=$(df --output=avail -B 1 / | tail -n 1)
-SPACE_MB=$(( (SPACE + 1048575)/1048576 ))
-(( ROOT_SPACE > SPACE )) && error "Not enough free space inside the container, have $SPACE_MB MB available but need at least 500 MB." && exit 96
+SPACE_MB=$(formatBytes "$SPACE" "down")
+(( ROOT_SPACE > SPACE )) && error "Not enough free space inside the container, have $SPACE_MB available but need at least 500 MB." && exit 96
 
 MIN_SPACE=15032385536
 SPACE=$(df --output=avail -B 1 "$STORAGE" | tail -n 1)
-SPACE_GB=$(( (SPACE + 1073741823)/1073741824 ))
-(( MIN_SPACE > SPACE )) && error "Not enough free space for installation in $STORAGE, have $SPACE_GB GB available but need at least 14 GB." && exit 94
+SPACE_GB=$(formatBytes "$SPACE")
+(( MIN_SPACE > SPACE )) && error "Not enough free space for installation in $STORAGE, have $SPACE_GB available but need at least 14 GB." && exit 94
 
 # Check if output is to interactive TTY
 if [ -t 1 ]; then
@@ -310,10 +310,10 @@ rm -f "$SYSTEM"
 # Check free diskspace
 SYSTEM_SIZE=10738466816
 SPACE=$(df --output=avail -B 1 "$STORAGE" | tail -n 1)
-SPACE_MB=$(( (SPACE + 1048575)/1048576 ))
+SPACE_MB=$(formatBytes "$SPACE")
 
 if (( SYSTEM_SIZE > SPACE )); then
-  error "Not enough free space in $STORAGE to create a 10 GB system disk, have only $SPACE_MB MB available." && exit 97
+  error "Not enough free space in $STORAGE to create a 10 GB system disk, have only $SPACE_MB available." && exit 97
 fi
 
 if ! touch "$SYSTEM"; then

src/network.sh

@@ -199,7 +199,6 @@ configureNAT() {
   fi
 
   # Create a bridge with a static IP for the VM guest
-
   { ip link add dev dockerbridge type bridge ; rc=$?; } || :
 
   if (( rc != 0 )); then
@@ -279,6 +278,22 @@ configureNAT() {
   return 0
 }
 
+closeBridge() {
+
+  local pid="/var/run/dnsmasq.pid"
+  [ -s "$pid" ] && pKill "$(<"$pid")"
+
+  [[ "${NETWORK,,}" == "user"* ]] && return 0
+
+  ip link set "$VM_NET_TAP" down promisc off &> null || true
+  ip link delete "$VM_NET_TAP" &> null || true
+
+  ip link set dockerbridge down &> null || true
+  ip link delete dockerbridge &> null || true
+
+  return 0
+}
+
 closeNetwork() {
 
   if [[ "$DHCP" == [Yy1]* ]]; then
@@ -294,26 +309,16 @@ closeNetwork() {
   exec 30<&- || true
   exec 40<&- || true
 
-  if [[ "$DHCP" == [Yy1]* ]]; then
+  if [[ "$DHCP" != [Yy1]* ]]; then
+
+    closeBridge
+    return 0
+
+  fi
 
   ip link set "$VM_NET_TAP" down || true
   ip link delete "$VM_NET_TAP" || true
 
-  else
-
-    local pid="/var/run/dnsmasq.pid"
-    [ -s "$pid" ] && pKill "$(<"$pid")"
-
-    [[ "${NETWORK,,}" == "user"* ]] && return 0
-
-    ip link set "$VM_NET_TAP" down promisc off || true
-    ip link delete "$VM_NET_TAP" || true
-
-    ip link set dockerbridge down || true
-    ip link delete dockerbridge || true
-
-  fi
-
   return 0
 }
 
@@ -459,15 +464,10 @@ else
     # Configure for tap interface
     if ! configureNAT; then
 
+      closeBridge
       NETWORK="user"
       warn "falling back to usermode networking! Performance will be bad and port mapping will not work."
 
-      ip link set "$VM_NET_TAP" down promisc off &> null || true
-      ip link delete "$VM_NET_TAP" &> null || true
-
-      ip link set dockerbridge down &> null || true
-      ip link delete dockerbridge &> null || true
-
     fi
 
   fi

src/proc.sh

@@ -9,6 +9,23 @@ set -Eeuo pipefail
 : "${CPU_MODEL:=""}"
 : "${DEF_MODEL:="qemu64"}"
 
+CLOCKSOURCE="tsc"
+[[ "${ARCH,,}" == "arm64" ]] && CLOCKSOURCE="arch_sys_counter"
+CLOCK="/sys/devices/system/clocksource/clocksource0/current_clocksource"
+
+if [ ! -f "$CLOCK" ]; then
+  warn "file \"$CLOCK\" cannot not found?"
+else
+  result=$(<"$CLOCK")
+  case "${result,,}" in
+    "${CLOCKSOURCE,,}" ) ;;
+    "kvm-clock" ) info "Nested KVM virtualization detected.." ;;
+    "hyperv_clocksource_tsc_page" ) info "Nested Hyper-V virtualization detected.." ;;
+    "hpet" ) warn "unsupported clock source detected: '$result'. Please set host clock source to '$CLOCKSOURCE'" ;;
+    *) warn "unexpected clock source detected: '$result'. Please set host clock source to '$CLOCKSOURCE'" ;;
+  esac
+fi
+
 if [[ "${ARCH,,}" != "amd64" ]]; then
   KVM="N"
   warn "your CPU architecture is ${ARCH^^} and cannot provide KVM acceleration for x64 instructions, this will cause a major loss of performance."
@@ -47,7 +64,6 @@ fi
 if [[ "$KVM" != [Nn]* ]]; then
 
   CPU_FEATURES="kvm=on,l3-cache=on,+hypervisor"
-  CLOCK="/sys/devices/system/clocksource/clocksource0/current_clocksource"
   KVM_OPTS=",accel=kvm -enable-kvm -global kvm-pit.lost_tick_policy=discard"
 
   if ! grep -qw "sse4_2" <<< "$flags"; then
@@ -61,15 +77,6 @@ if [[ "$KVM" != [Nn]* ]]; then
     CPU_FEATURES+=",migratable=no"
   fi
 
-  if [ -f "$CLOCK" ]; then
-    CLOCK=$(<"$CLOCK")
-    if [[ "${CLOCK,,}" != "tsc" ]]; then
-      warn "unexpected clocksource: $CLOCK"
-    fi
-  else
-    warn "file \"$CLOCK\" cannot not found?"
-  fi
-
   if grep -qw "svm" <<< "$flags"; then
 
     # AMD processor
@@ -127,7 +134,7 @@ else
 fi
 
 if [ -z "$HOST_CPU" ]; then
-  HOST_CPU=$(lscpu | grep -m 1 'Model name' | cut -f 2 -d ":" | awk '{$1=$1}1' | sed 's# @.*##g' | sed s/"(R)"//g | sed 's/[^[:alnum:] ]\+/ /g' | sed 's/  */ /g')
+  [[ "${CPU,,}" != "unknown" ]] && HOST_CPU="$CPU"
 fi
 
 if [ -n "$HOST_CPU" ]; then

src/reset.sh

@@ -17,7 +17,6 @@ echo "❯ For support visit $SUPPORT"
 
 : "${TZ:=""}"              # System local timezone
 : "${DEBUG:="N"}"          # Disable debugging mode
-: "${COMMIT:="N"}"         # Commit to local image
 : "${COUNTRY:=""}"         # Country code for mirror
 : "${CONSOLE:="N"}"        # Disable console mode
 : "${ALLOCATE:=""}"        # Preallocate diskspace
@@ -75,6 +74,7 @@ CPU="${CPU// with Radeon Graphics/}"
 CPU="${CPU// with Radeon Vega Graphics/}"
 
 [ -z "${CPU// /}" ] && CPU="Unknown"
+[ -n "${CPU_CORES//[0-9 ]}" ] && error "Invalid amount of CPU_CORES: $CPU_CORES" && exit 15
 
 # Check system
 
@@ -86,13 +86,13 @@ fi
 
 # Check folder
 
-if [[ "$COMMIT" != [Nn]* ]]; then
+if [[ "${COMMIT:-}" == [Yy1]* ]]; then
   STORAGE="/local"
   mkdir -p "$STORAGE"
-else
-  if [ ! -d "$STORAGE" ]; then
+fi
+
+if [ ! -d "$STORAGE" ]; then
   error "Storage folder ($STORAGE) not found!" && exit 13
-  fi
 fi
 
 # Check filesystem
@@ -103,15 +103,46 @@ if [[ "${FS,,}" == "ecryptfs" ]] || [[ "${FS,,}" == "tmpfs" ]]; then
   DISK_CACHE="writeback"
 fi
 
+formatBytes() {
+  local result
+  result=$(numfmt --to=iec "$1")
+  local unit="${result//[0-9. ]}"
+  if [ -z "$unit" ]; then
+    unit="bytes"
+  else
+    unit=$(echo "${unit^^}" | sed 's/K/KB/g;s/M/MB/g;s/G/GB/g;s/T/TB/g')
+  fi
+  result="${result//[a-zA-Z ]/}"
+  if [[ "${2:-}" == "up" ]]; then
+    if [[ "$result" == *"."* ]]; then
+      result="${result%%.*}"
+      result=$((result+1))
+    fi
+  else
+    if [[ "${2:-}" == "down" ]]; then
+      result="${result%%.*}"
+    fi
+  fi
+  echo "$result $unit"
+  return 0
+}
+
 # Read memory
 RAM_SPARE=500000000
 RAM_AVAIL=$(free -b | grep -m 1 Mem: | awk '{print $7}')
 RAM_TOTAL=$(free -b | grep -m 1 Mem: | awk '{print $2}')
+
+RAM_SIZE="${RAM_SIZE// /}"
+[ -z "$RAM_SIZE" ] && error "RAM_SIZE not specified!" && exit 16
+
+if [ -z "${RAM_SIZE//[0-9. ]}" ]; then
+  [ "${RAM_SIZE%%.*}" -lt "130" ] && RAM_SIZE="${RAM_SIZE}G" || RAM_SIZE="${RAM_SIZE}M"
+fi
+
 RAM_SIZE=$(echo "${RAM_SIZE^^}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
+! numfmt --from=iec "$RAM_SIZE" &>/dev/null && error "Invalid RAM_SIZE: $RAM_SIZE" && exit 16
 RAM_WANTED=$(numfmt --from=iec "$RAM_SIZE")
-AVAIL_GB=$(( RAM_AVAIL/1073741824 ))
-TOTAL_GB=$(( (RAM_TOTAL + 1073741823)/1073741824 ))
-WANTED_GB=$(( (RAM_WANTED + 1073741823)/1073741824 ))
+[ "$RAM_WANTED" -lt "136314880 " ] && error "RAM_SIZE is too low: $RAM_SIZE" && exit 16
 
 # Print system info
 SYS="${SYS/-generic/}"
@@ -119,18 +150,20 @@ FS="${FS/UNKNOWN //}"
 FS="${FS/ext2\/ext3/ext4}"
 FS=$(echo "$FS" | sed 's/[)(]//g')
 SPACE=$(df --output=avail -B 1 "$STORAGE" | tail -n 1)
-SPACE_GB=$(( (SPACE + 1073741823)/1073741824 ))
+SPACE_GB=$(formatBytes "$SPACE" "down")
+AVAIL_MEM=$(formatBytes "$RAM_AVAIL" "down")
+TOTAL_MEM=$(formatBytes "$RAM_TOTAL" "up")
 
-echo "❯ CPU: ${CPU} | RAM: $AVAIL_GB/$TOTAL_GB GB | DISK: $SPACE_GB GB (${FS}) | KERNEL: ${SYS}..."
+echo "❯ CPU: ${CPU} | RAM: ${AVAIL_MEM/ GB/}/$TOTAL_MEM | DISK: $SPACE_GB (${FS}) | KERNEL: ${SYS}..."
 echo
 
-# Check memory
+# Check available memory
 
-if [[ "$RAM_CHECK" != [Nn]* ]]; then
-  if (( (RAM_WANTED + RAM_SPARE) > RAM_AVAIL )); then
-    error "Your configured RAM_SIZE of $WANTED_GB GB is too high for the $AVAIL_GB GB of memory available, please set a lower value."
-    exit 17
-  fi
+if [[ "$RAM_CHECK" != [Nn]* ]] && (( (RAM_WANTED + RAM_SPARE) > RAM_AVAIL )); then
+  AVAIL_MEM=$(formatBytes "$RAM_AVAIL")
+  msg="Your configured RAM_SIZE of ${RAM_SIZE/G/ GB} is too high for the $AVAIL_MEM of memory available, please set a lower value."
+  [[ "${FS,,}" != "zfs" ]] && error "$msg" && exit 17
+  info "$msg"
 fi
 
 # Cleanup files
@@ -144,7 +177,7 @@ rm -rf "$STORAGE/tmp"
 # Helper functions
 
 isAlive() {
-  local pid=$1
+  local pid="$1"
 
   if kill -0 "$pid" 2>/dev/null; then
     return 0
@@ -154,7 +187,7 @@ isAlive() {
 }
 
 pKill() {
-  local pid=$1
+  local pid="$1"
 
   { kill -15 "$pid" || true; } 2>/dev/null
 
@@ -166,7 +199,7 @@ pKill() {
 }
 
 fWait() {
-  local name=$1
+  local name="$1"
 
   while pgrep -f -l "$name" >/dev/null; do
     sleep 0.2
@@ -176,7 +209,7 @@ fWait() {
 }
 
 fKill() {
-  local name=$1
+  local name="$1"
 
   { pkill -f "$name" || true; } 2>/dev/null
   fWait "$name"