# Ceiling Module |  High Endurance Micro-SDHC card 32 GB 100 MB/s UHS Class 3 by SANDISK

This card is used for Raspberry Pi operating system. Because we collect a lot of data which we are going to store in InfluxDB we have a huge amount of writing cycles. In the past we tested out regular SD cards which were defect after approx. one year of life time. So instead we use a "high endurance" or "industrial grade" SD card. Please do NOT remove the sd card with tweezers. You might scratch it to death, like shown in the following photo:

[![grafik.png](https://wiki.stadtfabrikanten.org/uploads/images/gallery/2026-06/scaled-1680-/ibirAcUv8pknCiWC-grafik.png)](https://wiki.stadtfabrikanten.org/uploads/images/gallery/2026-06/ibirAcUv8pknCiWC-grafik.png) [![grafik.png](https://wiki.stadtfabrikanten.org/uploads/images/gallery/2026-06/scaled-1680-/5afFCz5jQaU86pIK-grafik.png)](https://wiki.stadtfabrikanten.org/uploads/images/gallery/2026-06/5afFCz5jQaU86pIK-grafik.png)

## How to create a system image dump?

```bash
sudo dd if=/dev/sda of=/home/tomate/Downloads/hangprinter-dump.img bs=1M status=progress
31914459136 Bytes (32 GB, 30 GiB) kopiert, 1016 s, 31,4 MB/s
30436+1 Datensätze ein
30436+1 Datensätze aus
```