I found the specs of the marvel 88se9215 which say, that it uses a single PCIe 2.0 lane and thus is limited to 500MB/s (5Gb/s) which is less than the speed of a single SATA-3 channel. There are variants which use 2 lanes but looks like Friendlyarm saved on costs...

I am no expert for NanoPI. But in general LSBLK helps, as it lists all available block devices. If you cannot execute it from initramfs just issue it when you booted from SD. eMMC must be attached though, else it won't be shown. Since MMC and SD are dealt with similar by udev, it probably is /dev/mm...

Hi, I am considering buying a M4 + Sata Hat for building a NAS. Since I already had several ARM devices (RPi3, ReadyNAS RN104) which all are missing standby: Does the M4 offer standby? And regarding the SATA Hat: It delivers Sata 6 Gbps. But what PCIe Standard is brought by the M4? Is it all Softwar...