Using a USB disk for the music storage
It is also possible to use a USB stick or a USB disc for the music storage. In this case the files are seen
locally by the d1-server only. To add music on a USB stick or disk you must unplug it from the d1-
server and plug it into a computer.
The supported file systems are FAT32 or NTFS or linux file system.
At power ON the d1-server checks the USB disk integrity. If it contains errors it will correct it and this
can take time.
It is not allowed to use small 2.5inch box because they use the USB 5V power supply with most time
more than 500mA current consumption which is out of USB specification and can damage the d1-
server. Also the high current taken from the d1-server could make electro-magnetic pollution in the
d1-server power supply. So it is better to use small USB stick which require only a low current or use a
big 3.5inch box which always uses an external power supply, usually 12V. You can also insert a silent
2.5inch hard disk drive (or SSD) in a 3.5inch box via a mechanical adapter if necessary.
Please don't use a 2.5inch box even with an external 5V power supply because most time the
external 5V power supply is just in parallel with the USB cable power supply, so the poor quality
external supply will send ripple current to the d1-server and send pollution to the d1-server, resulting
in not the best sound.
A USB disk has no galvanic isolation between the disk, power supply and the d1-server.
Note: You can use several storage types at the same time, a NAS and a USB disk for example.
7
