I think I need to redo my Debian NAS. I have a Chenbro RM42300 chassis with two 5-bay enclosures. I also got a two of the 2-bay 2.5" drive. In the middle front of the chassis has 4-bay for HDD. My power supply is a Corsair HX850.
Currently, I am powering each 5-bays with two SATA power and the 4x HDD in the middle with this 4-in-1 cable. There were random times in the past that one of the HDD would disconnect from the system. When I ran the command lsblk -f, the disk is not there. I am not sure if it is a power issue or SATA cable issue. This probably happened 5 times in 6 years. The only way for me to bring the disk back was to reboot the NAS.
Recently, half of my disks were missing from lsblk -f. I powered down the NAS, and it has been offline since then. I am using an HBA with a SAS expander. I am trying to get an idea what could be causing the HDD to disconnect itself.
I don't know if this is a power issue or the SATA cable that I am using going loose, but this is the SATA cable that I have. The SATA cables don't have locks is my suspect at the moment. The last time I checked the SMART for each disk, it seemed to be in good health.