Debian 7 won't boot after reboot. md0 unknown partition table

Question

linux

How it was installed:
Some time ago the server was assembled and installed.
The first 400 GB HDD is used as a system one.
The second and third 1000 GB HDDs were combined into MD RAID1.
BIND9 was installed on this server, which worked successfully until I wanted to change the fan.
I repeat, nothing really happened on it, since someone was just too lazy to touch it ..
The system was turned off in the correct way (poweroff), the old cooler was successfully dismantled, the new cooler was successfully installed.
After turning it on, the system stopped booting with the following error:
Loading, please wait...
mdadm: /dev/md/0 has been started with 2 drivers.
Gave up waiting for root device. Common problems:
-Boot args (cat /proc/cmdline)
-Check rootdelay= (did the system wait long enough?)
-Check root= (did the system wait for the right device?)
-Missing modules (cat /proc/modules; ls / dev)
ALERT! /dev/disk/by-uuid/ff6cb909-9c6d-4363-974d-83efeafc6da2 does not exist/ Dropping to a shell!
When I tried to view the logs, using livecd, I tried to mount the root partition, but in the end nothing came of it, since I have a GPT partition on the disk.
How to deal with this problem?

Answer 1

In short, the hard went to the trash,
because in smart:
7 Seek_Error_Rate 0x000f 074 048 030 Pre-fail Always - 138245781527 Raw_Read_Error_Rate 0x000f
120 091 006 Pre-fail Always - 239155426 HDD delivered the cost, already the second such corpse: market.yandex.ru/model.xml?text=ST3400620NS&srnum=...

Answer 2

ubuntuforums.org/showthread.php?t=813090 might help

Answer 3

Are you sure you're not booting from md? And then Debian has such a jamb. There is a missing script in initramfs-tools.
Try when it falls out in the shell to do

mdadm --assemble --scan
exit

Answer 4

Well it is written - there is no disk with such and such uuid. Check if there is actually a partition with such a uuid. Maybe the uuid itself has flown, or maybe the partition