SCK : Serial Clock. Alternatives: SCK, SCLK, CLK, SCL
MOSI : "Master" Out → "Slave" In. Now can be read as "Main" Out "Sub" In, or can use these alternatives: SIMO, MTSR, SPID - correspond to MOSI on both main and sub devices, connects to each other SDI, DI, DIN, SI, SDA - on sub-only devices; Various abbreviations for "Serial" "Data" "In". Connects to MOSI (or alternative names) on main SDO, DO, DOUT, SO - on main-only devices; Various abbreviations for "Serial" "Data" "Out". connects to MOSI (or alternative names) on sub COPI, PICO for "peripheral and controller",[36][37] or COTI for "controller" and "target"[38]
MISO : "Master" In ← "Slave" Out. Now can be read as "Main" In "Sub" Out, or can use these alternatives: SOMI, MRST, SPIQ - correspond to MISO on both main and sub devices, connects to each other SDO, DO, DOUT, SO - on sub-only devices; connects to MISO (or alternative names) on main SDI, DI, DIN, SI - on main-only devices; connects to MISO (or alternative names) on sub CIPO, POCI,[36][37] or CITO[38]
SS : "Slave" Select (same functionality as Chip Select). Alternatives: SS, SS, SSEL, NSS, /SS, SS# (sub select) CS, CS (chip select) CE (chip enable)
기존 인스턴스 서버들은 점검 들어 가는 듯. 그래서 어쩔수 없이 무조건 다 내려버리는 듯?
One or more of your Amazon EC2 instances are scheduled for maintenance between 2024-09-23 08:00:00 UTC and 2024-09-23 10:00:00 UTC. These instances are listed in the Affected Resources Tab. During this time, the instances in the ap-northeast-2 region will be unavailable and rebooted.
At any time before 2024-09-23 08:00:00 UTC, you can reschedule this maintenance or stop and start the instance through the AWS API, AWS CLI, or AWS Management Console. When rescheduling, you can pick any time up to 2024-10-07 08:00:00 UTC, at which EC2 will perform maintenance on the instance. Otherwise, you can wait for EC2 to reboot your instance during the scheduled maintenance window. For more details on how to reschedule this event as well as other alternatives to complete this maintenance see the EC2 user guide https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring-instances-status-check_sched.html#reschedule-event
* What will happen to my instance during this maintenance event?
During maintenance the instance will be rebooted. The reboot generally takes a few minutes to complete. After the reboot, your instance retains its IP address, DNS name, and any data on local instance-store volumes.
* What will happen when I stop and start the instance?
You can stop and start the instance at any time before the scheduled maintenance window. This will migrate the instance to a new host and the instance will not have to undergo the scheduled maintenance. Please note that the data on any local instance-store volumes will not be preserved when you stop and start your instance. For more information about stopping and starting your instance see the EC2 User Guide https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Stop_Start.html.
If you have any questions or concerns, you can contact the AWS Support Team on the community forums and via AWS Premium Support at: https://aws.amazon.com/support.
