Server Stuck on grub terminal

After upgrade REHL 6 to 7 and rebooting the server which is implemented on HP Gen9 a grub terminal show up and I can't boot up the os .

Do you have any clue how to solve this issue without loss the data which was implemented on this server.

grub> reboot
HP ProLiant System BIOS P89 v2.00 (12/27/2015)
(C) Copyright 1982 - 2015 Hewlett Packard Enterprise Development LP
Early system initialization, please wait...

iLO 4 IPv4: 10.28.20.103
iLO 4 IPv6: FE80::1E98:ECFF:FE23:60D2

2%: System Chipset Initialization
4%: QPI Link Initialization - Start
6%: QPI Link Initialization - Complete
9%: Early Processor Initialization
11%: Memory Initialization - Start
21%: Memory Initialization - Complete

24%: System Security Initialization
27%: HPE SmartMemory Initialization
37%: Loading System Firmware Modules - Start
46%: Loading System Firmware Modules - Complete
49%: USB Controller Initialization
52%: Chipset Root Ports Initialization
55%: Processor Root Ports Initialization
61%: ACPI Table Initialization

64%: SMBIOS Table Initialization
67%: iLO Embedded Health Initialization
70%: BIOS Configuration Initialization
76%: Early PCI Initialization - Start
82%: Early PCI Initialization - Complete
91%: Switching console output to Primary Video. Please wait..

grub>
grub> ls
(hd0) (hd0,gpt3) (hd0,gpt2) (hd0,gpt1) (lvm/VolGroup-lv_root)
(lvm/VolGroup-lv_swap) (lvm/VolGroup-lv_home) (lvm/VolGroup-lv_varlog)
(lvm/VolGroup-lv_var) (lvm/VolGroup-lv_vartmp) (lvm/VolGroup-lv_varlogaudit)
(lvm/VolGroup-lv_varlog_altroot) (lvm/VolGroup-lv_swap_altroot)
(lvm/VolGroup-lv_root_altroot)

Well, I assume you backup your data regularly...

Anyway, this looks like one of these cases where you use the installation cd and boot from cd and select installation until you get to the point where the machine's hard drive is analyzed and the installer recognizes an installed linux system and offers you to boot it. (SuSE Linux always worked like that and Siduction offers a separate menu entry in its on-cd grub.) And then you reinstall grub.

If your installation cd doesn't offer that option, you likely have to find some live cd and boot that one and then chroot into the previously mounted system partition of your hard drive. (And then reinstall grub, obviously.)
There's plenty of instructions on the net on how to chroot. Also, I've only done this with other distributions (openSUSE and Ubuntu), so I can't really give you any detail on how to it on RedHat.

You may also want to try https://www.supergrubdisk.org/super-grub2-disk/ as a replacement for grub. (If it works for you, it doesn't always.)

Your not getting a grub-rescue that is a good thing,t If you know where your grub.cfg is located can do something like this
configfile (hd0,gpt?)/grub2/grub.cfg
Is one of the partitions a boot partition?
can try something like this from the grub menu

linux (hd0,gpt?)/vmlinuz-?? root=/dev/mapper/lvm/VolGroup-lv_root
initrd (hd0,gpt?)/initrd-???

where the ? you will have to fill the appropiate variables.

ls (hd0,gpt?)/

will give insight on what is on the partition.
Then reinstall grub

Originally Posted by colorpurple21859 Your not getting a grub-rescue that is a good thing,t If you know where your grub.cfg is located can do something like this configfile (hd0,gpt?)/grub2/grub.cfg Is one of the partitions a boot partition? can try something like this from the grub menu linux (hd0,gpt?)/vmlinuz-?? root=/dev/mapper/lvm/VolGroup-lv_root initrd (hd0,gpt?)/initrd-??? where the ? you will have to fill the appropiate variables. ls (hd0,gpt?)/ will give insight on what is on the partition. Then reinstall grub

When I try to list I find the below output , Can I have a way to boot from it.

grub> ls (hd0,gpt2)/
./ ../ lost+found/ efi/ grub2/ initrd-plymouth.img
.vmlinuz-3.10.0-693.el7.x86_64.hmac System.map-3.10.0-693.el7.x86_64
config-3.10.0-693.el7.x86_64 symvers-3.10.0-693.el7.x86_64.gz
vmlinuz-3.10.0-693.el7.x86_64 initramfs-3.10.0-693.el7.x86_64.img
initramfs-0-rescue-4f765311f7a945f8a951b865bcc43525.img
vmlinuz-0-rescue-4f765311f7a945f8a951b865bcc43525
initraexit0-rescue-4f765311f7a945f8a951b865bcc43525.img

try this

configfile (hd0,gpt2)/grub2/grub.cfg

or

linux (hd0,gpt2)/vmlinuz-3.10.0-693.el7.x86_64 root=/dev/mapper/lvm/VolGroup-lv_root
initrd (hd0,gpt2)/initramfs-3.10.0-693.el7.x86_64.img
boot

not sure what the root= should be or any other kernel parameters that are needed.