If the power supply is not enough, Linux may start unexpectedly.-File System Access is abnormal.

The company's computer is idle with two hard disks. I want to put these two hard disks on a celon D machine. This machine has a power supply of 250 W, it is estimated that the actual output power may be less than 200 W. A hard disk and an optical drive were previously attached.

After the hard disk is loaded, the machine starts and can identify three hard disks and one optical drive. The result shows that the system stops running from CD at the beginning, because the optical drive is set to start first and then start the hard disk. Don't care, set it in the BIOS as a hard disk first, and then enter Linux, and found a more strange phenomenon.

Linux has been running on starting system logger since it was started: This step is the case several times, so we enter runlevel 1 and find that there is a problem with mounting the file system,/proc, /boot.

After repeated debugging, we found that it was normal to unplug the power of the other two hard disks, which was caused by insufficient power. Therefore, do not think that the system recognizes the hard disk.

I searched Baidu and found that the CPU of this machine is celon D 2.66, which belongs to the P4 pipeline and consumes a lot of power. It is estimated that it is 80 ~ , The power consumption of the motherboard is generally 60 W, and the power consumption of the hard disk is generally 30 W (the power consumption is greater when the hard disk is started). The video card is integrated, so it is not worth it, in this case, the power is 260 (three hard drives and one optical drive), and the power is not enough! At least power supply is required.