Hi, Thanks to everyone again! By the way, why I am considering to use USB at all is that the storage system is for a solar powered site. And therefore I have to limit power usage to roughly 10-15W... So my thinking was to use some ARM board and low-power 2.5" disks. Unfortunately, many of the low-power, ARM based boards seem to have no SATA. Or just a single SATA port, often internally wired to USB... And yeah, I basically bought a Pi3 and some SATA-to-USB dongles before stumbling over this entry in the Wiki... my fault... But I'm glad to hear that there does not seem to be an issue with USB itself, but more the circumstances. Regarding cabling and temperature, I'm not too worried. I already 3D-printed some stackable enclosures, even with snap-in mechanisms and holes for srews, and with hopefully enough airflow capabilities (people had uploaded some nice designs at thingiverse.com). But I'll keep an eye on what other ARM based boards with on-board SATA will come out in the future. And will keep in mind to swap the board later. Again, many thanks! Regards, Linus PS: And sharing one nightmare story with USB, too: Had a disk from Toshiba connected to a SATA-to-USB adapter with no extra power supply and that was connected to an Odroid C1+ (an ARM board from Hardkernel). The Odroid was not capable of providing enough power and turned off the USB port for half a second upon noticing. So I had this nice sound of a disk trying to spin up about twice a second. Ten seconds later I caught up with what was going on and disconnected the disk. Nevertheless too late, the disk was broken then... unrecoverable bad sectors even after trying to wipe the disk. So in that case, an external USB Hub with its own power supply would have actually saved that disk, I guess. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
