On 3/31/2012 9:05 PM, daobang wang wrote: > There is another problem occurred, it seems that the file system was > damaged when the pressure is very high, What kernel version are you using? Did you get an oops? What's in dmesg? > it reported input/output error Actual errors would be very helpful. > when i typed ls or other command, and I tried to repair it with > xfs_repair /dev/vg00/lv0000, the xfs_repir alloc memory failed, we Did XFS automatically unmount the filesystem? If not, the error reported may not indicate a problem with the filesystem. XFS shuts filesystems down when it encounters serious problems. > have 4GB memory on the machine, and the logical volume was a little > more than 15TB, Could it be repair successfully if we have enough > memory? Hard to say. Depends on what happened and the extent of the damage, if any. You've presented no log or debug information. I would think 4GB should be plenty to run xfs_repair. Try $ xfs_repair -n -vv -m 1 /dev/vg00/lv0000 dmem = in the output tells you how much RAM is needed for xfs_repair. If it's more than 2GB and you're using a PAE kernel, switch to a 64 bit kernel and 64 bit userland. If dmem is over 4GB then you need more DIMMs in the machine. Or maybe simply dropping caches before running xfs_repair might help: $ echo 3 > /proc/sys/vm/drop_caches -- Stan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
