topic Re: mount volumn in Operating System - Linux

mount volumn

ivy1234 — Mon, 12 Apr 2010 11:53:53 GMT

I have a HDD that can not be bootup ( should be the boot file problem ) ,I want to get back the data in it , so I plug it to another server , and trying to copy the data from the failure HDD to this server .

Now , the server is re-boot and in maintenance mode as the HDD can not do the system check . when I try to copy data , it pops the server is read-only system , can advise

1. how to let me write data to the server ; or
2. let me boot up the server , then I will mount the HDD to it , and copy the data to the server .

Thanks in advance.

Re: mount volumn

Ivan Ferreira — Mon, 12 Apr 2010 14:35:56 GMT

>>> the server is re-boot and in maintenance mode

Maybe in "maintenance mode" your file systems are mounted as read only.

Try with:

mount -o rw,remount /

Re: mount volumn

Ralph Grothe — Thu, 15 Apr 2010 14:05:36 GMT

Exactly as Ivan wrote,
the root FS is first ro mounted as stated in grub.conf's kernel entry

# grep ^[^#]\ *kernel /boot/grub/grub.conf
kernel /vmlinuz-2.6.18-164.el5 ro root=/dev/vg_root/lv_root

Re: mount volumn

Arockiasamy — Sun, 18 Apr 2010 13:51:42 GMT

I'm not getting what u r asking.

But, If any booting related issues, Please follow the steps to solve the problem.

If it is going to maintenance mode, the there must be problem with the root partition or boot partition.

1. Boot the Installation Disk(RHEL5)> Go through the rescue mode ( linux rescue )> run
the disk check by "fsck" to the root&boot partitions( disk can be findout by iostat, cat /proc/diskstats, parted) > fix the errors if any > reboot.

2.If the partitions are not showing the filesystem type. Then it will be solved.

3.At the same time, u can take your data to the pen drive.

4.See the boot partition files like kernel, initrd.

Other case is that if u did the size reduction in boot/root disk, we can't recover.