The Mac had an IPv6 address but couldn't ping any public IPv6 address. It had always worked, then one day it just stopped, and rebooting the router didn't help. It turned out to be iStoreOS's unstable NDP Relay mode — flipping one line of config from relay to server fixed it. This post walks through the full layer-by-layer investigation down to the root cause.
AWS does not provide Windows AMIs for the Graviton architecture, but that doesn't mean Graviton can't run Windows. This article documents how to use the open-source project bin456789/reinstall's one-click DD script to reinstall a t4g instance running Amazon Linux 2023 into Windows 11 Pro ARM64 in place.
When I get a new Mac, I like to do a systematic inspection first: hardware info, SSD health, port status, security configuration, and system stability — all checked through. This way, if any issues come up later, I can tell whether it's a machine problem or caused by the usage environment.
After running Windows 11 ARM on EC2 Graviton instances, the most practical question is: do x86/x64 operations tools still work? This article tests the full Sysinternals Suite on t4g.large (Graviton2), comparing ARM64 native vs x64 emulated performance.
Running Windows 11 ARM on a Graviton instance requires the AWS ENA ARM64 driver, which currently has only a single version (2.2.1). Can it saturate the t4g.large network burst limit? This article runs a complete iperf3 throughput test.
A DD-installed Windows 11 ARM on Graviton uses the Microsoft inbox StorNVMe.sys rather than the official AWS AWSNVMe.sys. Will this inbox driver become an IO bottleneck? This article runs a full diskspd test suite for IOPS and throughput, locking the bottleneck to the instance side.
Windows 11 ARM on Graviton is installed through an unofficial path. Can Windows Update still work normally? Will updates replace the inbox StorNVMe driver and break the system? This article runs a complete scan/download/install verification.
Private-subnet EC2 instances without a public IP, where you don't want to pay for the managed AWS NAT Gateway. You can use a Windows Server 2022 instance with RRAS NAT for egress. This article records the full setup and the pitfalls.
Windows instances fail Sysprep when creating an AMI, reporting error 0x80073cf2. The cause is an AppX package registered by Notepad++ 8.9+ that remains even after uninstalling the desktop version.
After an EC2 Windows instance boots, the system time is 8 hours behind. W32Time then applies a one-time 8-hour jump on sync, causing log timestamp chaos and Kerberos failures. The root cause is confusion between RTC local time and UTC.