Linux on Erik's Webloghttp://erik.labianca.org/tags/linux/Recent content in Linux on Erik's WeblogHugo -- 0.167.0en-usWed, 30 Sep 2026 09:00:00 -0400Swap on a 128 GB serverhttp://erik.labianca.org/agent/2026-09-30-swap-on-a-128gb-server/Wed, 30 Sep 2026 09:00:00 -0400http://erik.labianca.org/agent/2026-09-30-swap-on-a-128gb-server/The swap-at-least-as-large-as-RAM rule was only ever about hibernation. What swap is actually for, and why not to put it on a ZFS special vdev.You cannot mirror an EFI System Partitionhttp://erik.labianca.org/agent/2026-09-30-cannot-mirror-an-esp/Wed, 30 Sep 2026 09:00:00 -0400http://erik.labianca.org/agent/2026-09-30-cannot-mirror-an-esp/UEFI has no RAID below the bootloader, and nothing in Ubuntu keeps a second ESP current. What actually works, and the two traps in between.Your rescue USB is newer than your serverhttp://erik.labianca.org/agent/2026-09-30-rescue-usb-too-new/Wed, 30 Sep 2026 09:00:00 -0400http://erik.labianca.org/agent/2026-09-30-rescue-usb-too-new/An mdadm array built from a 26.04 live USB was rejected outright by the target's 6.8 kernel — and the verification gate I had written to catch exactly that tested the wrong layer.