I'm in a bit of a pickle. I have a headless server (Acer EasyStore) running Ubuntu 12.04.1, which, after an update, now refuses to boot. It has four disks, one of which holds the OS in a partition and the rest, along with the other three disks, is an mdraid array.
I've inserted the OS disk in another computer (a VM) and tried to boot, but it gives me a scary error message:
WARNING: There appears to be one or more degraded RAID devices ** The system may have suffered a hardware fault, such as a disk drive failure. The root device may depend on the RAID devices being online. One or more of the following RAID devices are degraded: Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] <snip> unused devices: <none> You may attempt to start the system anyway, or stop now and attempt manual recovery operations. To do this automatically in the future, add "bootdegraded=true" to the kernel boot options. If you choose to start the degraded RAID, the system may boot normally, but performance may be degraded, and a further hardware fault could result in permanent data loss. If you abort now, you will be provided with a recovery shell. Do you wish to start the degraded RAID? [y/N]:
I want to continue and see what's going on (and if the server will start SSH so I can log into it), but this message is really scary. If I boot without the RAID, will I lose all my data? It doesn't stand to reason that I'd lose the array even though all four disks are fine, but the warning is very strongly worded.
Does anyone know if this means I'll lose my data? Is there another alternative?