Centos 6.8 failed reboot hosted dedicated server

ServerDude · 01-10-2017, 11:58 AM

I bought/rent a dedicated server from nocix with Centos 6.8 installed, also came with 2 hard drives

Code:

sda - 128GB SSD

&

Code:

sdb - 2TB HDD

and I think I made a mistake by partitioning the second drive

Code:

/dev/sdb

so I now have

Code:

/dev/sdb1

which I mounted to a folder called

Code:

/newdrive

then transferred all files in a user directory called

Code:

/home1

and deleted all files in

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/home1

then mounted the drive to

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/home1

but when I rebooted I lost the ability to connect via SSH, I contacted nocix and they said I had to reload with the SystemRescueCd.

I did that and have been reading/following the steps outlined here: https://www.system-rescue-cd.org/Sys...a-damaged-Grub

See the below error messages I got when I ran

Code:

grub-install /dev/sda

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df: Warning: cannot read table of mounted file systems: No such file or directory df: Warning: cannot read table of mounted file systems: No such file or directory Could not find device for /boot: Not found or not a block device.

I am very new to this so I'm not sure what to do.. It's also quite urgent as the websites this server is hosting are down because of I can't get it back online.

See my partitions below. I've got 2 drives sda and sdb. loop0 is the linux installation and sda1 is the boot drive.

Code:

[=====DEVICE=====] [==FILESYS==] [======LABEL======] [====SIZE====] [MAJ] [MIN]
[loop0           ] [squashfs   ] [<unknown>        ] [   275.14 MB] [  7] [  0]
[sda1            ] [ext2       ] [<unknown>        ] [   250.00 MB] [  8] [  1]
[sda2            ] [LVM2_member] [<unknown>        ] [   119.00 GB] [  8] [  2]
[sdb1            ] [ext3       ] [/userdata        ] [     1.82 TB] [  8] [ 17]
[dm-0            ] [ext4       ] [<unknown>        ] [   110.25 GB] [253] [  0]
[dm-1            ] [ext4       ] [<unknown>        ] [     1.00 GB] [253] [  1]
[dm-2            ] [swap       ] [<unknown>        ] [     7.72 GB] [253] [  2]

Output of

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vgscan

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WARNING: lvmetad is running but disabled. Restart lvmetad before enabling it!
  Reading all physical volumes.  This may take a while...
  Found volume group "vg" using metadata type lvm2

And output of

Code:

lvscan

Code:

  WARNING: lvmetad is running but disabled. Restart lvmetad before enabling it!
  ACTIVE            '/dev/vg/root' [110.25 GiB] inherit
  ACTIVE            '/dev/vg/tmp' [1.00 GiB] inherit
  ACTIVE            '/dev/vg/swap' [7.72 GiB] inherit

jefro · 01-10-2017, 05:05 PM

Not sure what way to tell you to go exactly.

Generally I say get data off that is important to start before you mess it up more. Get a usb drive and copy the system maybe if you are sure you can do that safely.

Not sure I'd have used systemrescue cd exactly. Guess you could try a fedora or other RH based live media of similar kernel level to use.

Didn't get the ssh part. You do have full physical access don't you? I assume you did something to the users that messed up ssh access is my guess.

Your lvm complaint is that you need to start lvm services isn't it? lvmetad I think has some config setting for 0 or 1 maybe.

After you messed with grub you may end up just taking data off and putting on recovery image. Not sure why that company didn't ship you recovery media with system.

ServerDude · 01-10-2017, 10:08 PM

Quote:

Originally Posted by jefro

Not sure what way to tell you to go exactly.

Generally I say get data off that is important to start before you mess it up more. Get a usb drive and copy the system maybe if you are sure you can do that safely.

Not sure I'd have used systemrescue cd exactly. Guess you could try a fedora or other RH based live media of similar kernel level to use.

Didn't get the ssh part. You do have full physical access don't you? I assume you did something to the users that messed up ssh access is my guess.

Your lvm complaint is that you need to start lvm services isn't it? lvmetad I think has some config setting for 0 or 1 maybe.

After you messed with grub you may end up just taking data off and putting on recovery image. Not sure why that company didn't ship you recovery media with system.

I don't have physical access, it's a hosted dedicated server, I have a control panel where I get the login credentials and schedule OS reloads etc. One of the reloads is the sysrcd which boots from memory and preserves the hard drives. I am able to FTP in on the sysrcd as root and mount the drives in a putty terminal to make a backup.

I did change the hostname in /etc/hosts and also in /etc/sysconfig/network just before reboot if that may be the cause?

jefro · 01-11-2017, 04:14 PM

When I had a leased off site system they had a way to re-image the system from menu. I'd still start with getting the data off that you like.

FTP working is a good sign. Kind of removes the hostname issue.

So, are they saying that you have boot remotely using some image? Do they offer the system rescue image?