Claude
889c38c143
12x 3.5" HDDs spinning up simultaneously can spike ~240W, pushing a single 750W PSU close to its limit. Two-layer fix: - Layer 1: racadm iDRAC BIOS setting (HddSeq) fires at POST before OS loads - Layer 2: stagger-spinup.service wakes drives one at a time via hdparm on boot https://claude.ai/code/session_01TxTSnxDjgEVuNztdsWQjMD
105 lines
3.7 KiB
Bash
Executable File
105 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
# Stagger hard drive spin-up on Dell R730xd to avoid PSU current surge at boot.
|
|
#
|
|
# 12 x 3.5" HDDs spinning up simultaneously can spike ~240W for 2-3 seconds.
|
|
# Staggering them 2-3 seconds apart keeps the surge well within PSU limits.
|
|
#
|
|
# TWO layers of protection:
|
|
# 1. iDRAC BIOS setting — fires at POST, before the OS loads (preferred)
|
|
# 2. Linux systemd service — staggers drives that weren't spun up at POST
|
|
#
|
|
# SETUP
|
|
# ─────
|
|
# Layer 1 (iDRAC, run once):
|
|
# bash stagger-spinup.sh --idrac
|
|
# # Requires racadm and iDRAC network access, then reboot to apply.
|
|
#
|
|
# Layer 2 (Linux service, run once):
|
|
# cp stagger-spinup.sh /usr/local/sbin/stagger-spinup.sh
|
|
# chmod +x /usr/local/sbin/stagger-spinup.sh
|
|
# Install the systemd unit below, then:
|
|
# systemctl daemon-reload && systemctl enable stagger-spinup.service
|
|
|
|
set -euo pipefail
|
|
|
|
STAGGER_SECONDS=3 # delay between each drive spin-up
|
|
HDPARM=$(command -v hdparm || true)
|
|
|
|
# ── iDRAC BIOS method (Layer 1) ───────────────────────────────────────────────
|
|
|
|
configure_idrac() {
|
|
if ! command -v racadm &>/dev/null; then
|
|
echo "racadm not found."
|
|
echo "Option A: Run from iDRAC SSH:"
|
|
echo " ssh root@<idrac-ip>"
|
|
echo " racadm set BIOS.StorageSettings.HddSeq Enabled"
|
|
echo " racadm jobqueue create BIOS.Setup.1-1"
|
|
echo " # Then reboot to apply."
|
|
echo ""
|
|
echo "Option B: iDRAC web UI:"
|
|
echo " System BIOS → Power Management → Hard Disk Drive Sequencing → Enabled"
|
|
echo " Apply and reboot."
|
|
return 0
|
|
fi
|
|
|
|
echo "Enabling iDRAC hard disk drive sequencing (staggered spin-up)..."
|
|
racadm set BIOS.StorageSettings.HddSeq Enabled
|
|
racadm jobqueue create BIOS.Setup.1-1
|
|
echo "Job queued. Reboot for the BIOS setting to take effect."
|
|
echo "Verify after reboot with: racadm get BIOS.StorageSettings.HddSeq"
|
|
}
|
|
|
|
# ── Linux spin-up stagger (Layer 2) ──────────────────────────────────────────
|
|
# Called by the systemd service early in boot.
|
|
# Reads each block device in sequence with a short delay, causing drives in
|
|
# standby to spin up one at a time rather than simultaneously.
|
|
|
|
stagger_linux() {
|
|
if [[ -z "$HDPARM" ]]; then
|
|
echo "hdparm not found — apt install hdparm"
|
|
exit 1
|
|
fi
|
|
|
|
mapfile -t drives < <(lsblk -dn -o NAME,TYPE | awk '$2=="disk"{print "/dev/"$1}' | sort)
|
|
|
|
if [[ ${#drives[@]} -eq 0 ]]; then
|
|
echo "No block devices found."
|
|
exit 0
|
|
fi
|
|
|
|
echo "$(date): Staggering spin-up for ${#drives[@]} drives (${STAGGER_SECONDS}s apart)..."
|
|
|
|
for dev in "${drives[@]}"; do
|
|
# Skip if device is already active (check power mode)
|
|
state=$($HDPARM -C "$dev" 2>/dev/null | grep -oP '(?<=drive state is: )\S+' || echo "unknown")
|
|
|
|
if [[ "$state" == "standby" || "$state" == "sleeping" ]]; then
|
|
echo "$(date): Waking $dev (was: $state)"
|
|
# A zero-length read is enough to trigger spin-up
|
|
dd if="$dev" of=/dev/null bs=512 count=1 status=none 2>/dev/null || true
|
|
sleep "$STAGGER_SECONDS"
|
|
else
|
|
echo "$(date): $dev already active (state: $state) — skipping"
|
|
fi
|
|
done
|
|
|
|
echo "$(date): Stagger complete."
|
|
}
|
|
|
|
# ── Argument dispatch ─────────────────────────────────────────────────────────
|
|
|
|
case "${1:-}" in
|
|
--idrac)
|
|
configure_idrac
|
|
;;
|
|
--linux|"")
|
|
stagger_linux
|
|
;;
|
|
*)
|
|
echo "Usage: $0 [--idrac | --linux]"
|
|
echo " --idrac Configure iDRAC BIOS staggered spin-up (one-time setup)"
|
|
echo " --linux Stagger drives via hdparm now (run by systemd service)"
|
|
exit 1
|
|
;;
|
|
esac
|