this moment I tested the changes in fstab and it seems to be good.
I changed for every entry the scsi ID. When I set df -ah I see everything correct.
Another problem is that I do not have any GUI after starting. I tried to do startx and it does not work.
When I try it said
is it a wrong command or are there any other commands left to have GUI?
So far thank you so much for solving the first error.
unlike in your other response, you here state correctly that you need to replace the entries with the correct values.
Your disk device(s) (and partitions, too) can be referenced by different names in Linux. I.e., for decades the typical name would have been /dev/sda for your first SCSI disk (/dev/sda1 being the first partition on that disk), but what if you have more than one disk? They’d be sda, sdb and so on, but in which order? Therefore, additional names were added, like “use disk ID”, “use device location on system bus”, “use file system label” and so on.
In your case, the partitions to mount are referenced by device id plus partition number. As the device ID has changed, you’ll either need to adjust that to the correct new value or use some other reference (hence my earlier suggestion to use /dev/sda*, as your server currently has only a single disk, no question on who’s who will come up… and it’s easier to type for you )
You may not delete the entries in /etc/fstab, but need to correct them. These entries tell the system which file systems on which device (partition) to mount.