m.roth at 5-cent.us wrote, On 03/23/2010 09:49 AM: >> sync wrote: >>> Thanks for all replies . >>> >>> Today, I did the following things,and also met the other errror message: > <snip> >>> Then, reboot the server and then boot it from the hard disk. >>> >>> This time, the screen came up with these: >>> >>> Checking root filesystem: >>> ---------------------------------------------- >>> EXT3-fs error (device dm-0) : >>> ext3_get_inode_loc: unable to read inode block -inode=7473432, >>> block=14942282 > <snip> >>> It is obvious that the fsck command maybe not to use . >>> >>> What could i do now ? >>> >>> Maybe it is the only method to reinstall the CentOS operating system. >>> isn't it? >> That looks like you either have a physically bad hard disk, or >> directory/inode corruption in the entry needed to load fsck. Try running > <snip> > Looks to me as though you definitely have a hard drive going bad. The > thing that says that to me is "unable to read", not "error reading". I'd > reboot from a DVD with linux rescue, do *not* mount the filesystems, and > do an fsck -c (and any other options) on all the partitions that are > formatted. This will check for bad blocks. If there's only a few, say, 1, > or 10, note how many of them there are, and let it take its default to > mark, and then fix everything else. If there's a *bunch* of them (100+), > you need a new hard disk, now. > > mark "done this too much recently" Side question: is there encryption in use on the volumes? And assuming you fsck ... considering "Checking root filesystem" is where the error shows up, I would be a) reading `man rpm` and b) running some variation of for i in `all the packages installed`; \ do \ echo "looking at $i"; \ rpm -V $i;\ done > howbadismysystem.txt 2>&1 or rpm -Va > confusinghowbadismysystem.txt 2>&1 and look for things that are not config files that have changed. of course on CentOS 5.x prelinking makes a mess of things. And then there is the implicit assumption that the rpm db was not one of the things that got hammered. :) -- Todd Denniston Crane Division, Naval Surface Warfare Center (NSWC Crane) Harnessing the Power of Technology for the Warfighter