Claude
95ea951741
BIOS.StorageSettings.HddSeq no longer exists on R730xd firmware 2.19+. Update --idrac mode to print a clear explanation instead of failing, and update docs to skip Layer 1 and go straight to the Linux systemd service. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
99 lines
3.7 KiB
Bash
Executable File
99 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Stagger hard drive spin-up on Dell R730xd to avoid PSU current surge at boot.
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#
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# 12 x 3.5" HDDs spinning up simultaneously can spike ~240W for 2-3 seconds.
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# Staggering them 2-3 seconds apart keeps the surge well within PSU limits.
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#
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# TWO layers of protection:
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# 1. iDRAC BIOS setting — fires at POST, before the OS loads (preferred)
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# 2. Linux systemd service — staggers drives that weren't spun up at POST
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#
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# SETUP
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# ─────
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# Layer 1 (iDRAC, run once):
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# bash stagger-spinup.sh --idrac
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# # Requires racadm and iDRAC network access, then reboot to apply.
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#
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# Layer 2 (Linux service, run once):
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# cp stagger-spinup.sh /usr/local/sbin/stagger-spinup.sh
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# chmod +x /usr/local/sbin/stagger-spinup.sh
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# Install the systemd unit below, then:
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# systemctl daemon-reload && systemctl enable stagger-spinup.service
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set -euo pipefail
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STAGGER_SECONDS=3 # delay between each drive spin-up
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HDPARM=$(command -v hdparm || true)
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# ── iDRAC BIOS method (Layer 1) ───────────────────────────────────────────────
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configure_idrac() {
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# BIOS.StorageSettings.HddSeq was removed in R730xd BIOS 2.19+.
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# The BIOS-level stagger is no longer available; rely on Layer 2 (Linux service).
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echo "NOTE: BIOS.StorageSettings.HddSeq was removed in R730xd BIOS 2.19+."
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echo "The iDRAC/BIOS layer for staggered spin-up is not available on this firmware."
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echo ""
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echo "Use the Linux systemd service (Layer 2) instead — it handles the same"
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echo "job by staggering drives that are in standby at OS boot time."
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echo ""
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echo "To install the service:"
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echo " cp stagger-spinup.sh /usr/local/sbin/stagger-spinup.sh"
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echo " chmod +x /usr/local/sbin/stagger-spinup.sh"
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echo " # copy stagger-spinup.service to /etc/systemd/system/"
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echo " systemctl daemon-reload && systemctl enable stagger-spinup.service"
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}
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# ── Linux spin-up stagger (Layer 2) ──────────────────────────────────────────
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# Called by the systemd service early in boot.
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# Reads each block device in sequence with a short delay, causing drives in
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# standby to spin up one at a time rather than simultaneously.
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stagger_linux() {
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if [[ -z "$HDPARM" ]]; then
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echo "hdparm not found — apt install hdparm"
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exit 1
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fi
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mapfile -t drives < <(lsblk -dn -o NAME,TYPE | awk '$2=="disk"{print "/dev/"$1}' | sort)
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if [[ ${#drives[@]} -eq 0 ]]; then
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echo "No block devices found."
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exit 0
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fi
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echo "$(date): Staggering spin-up for ${#drives[@]} drives (${STAGGER_SECONDS}s apart)..."
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for dev in "${drives[@]}"; do
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# Skip if device is already active (check power mode)
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state=$($HDPARM -C "$dev" 2>/dev/null | grep -oP '(?<=drive state is: )\S+' || echo "unknown")
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if [[ "$state" == "standby" || "$state" == "sleeping" ]]; then
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echo "$(date): Waking $dev (was: $state)"
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# A zero-length read is enough to trigger spin-up
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dd if="$dev" of=/dev/null bs=512 count=1 status=none 2>/dev/null || true
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sleep "$STAGGER_SECONDS"
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else
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echo "$(date): $dev already active (state: $state) — skipping"
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fi
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done
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echo "$(date): Stagger complete."
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}
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# ── Argument dispatch ─────────────────────────────────────────────────────────
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case "${1:-}" in
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--idrac)
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configure_idrac
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;;
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--linux|"")
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stagger_linux
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;;
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*)
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echo "Usage: $0 [--idrac | --linux]"
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echo " --idrac Configure iDRAC BIOS staggered spin-up (one-time setup)"
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echo " --linux Stagger drives via hdparm now (run by systemd service)"
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exit 1
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;;
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esac
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