rhel 4.6卡顿死机

shine_wang

服务器两个硬盘做R1，未见硬盘黄灯
键盘输入卡顿，死机两次（无反应），重启是提示清理/app( cciss/c0d0p3)
e2fsck -a提示要用fsck手工模式，很多要打y，一直按，其中有些按n，之后重启
第二套又死机，在single下，fsck -y做完，启动，发现速度仍时有卡顿
现在/app下面很多lost+found文件，里面很多文件夹，是否可以删除？
请问如何诊断是否硬盘有坏道还是故障？谢谢！

下面是dmesg日志片段
EXT3 FS on cciss/c0d0p3, internal journal
device-mapper: 4.5.5-ioctl (2006-12-01) initialised: dm-devel@redhat.com
device-mapper: dm-multipath version 1.0.5 loaded
kjournald starting.  Commit interval 5 seconds
EXT3 FS on cciss/c0d0p2, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on cciss/c0d0p6, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on cciss/c0d0p1, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
Adding 2096440k swap on /dev/cciss/c0d0p5.  Priority:-1 extents:1
IA-32 Microcode Update Driver: v1.14 <tigran@veritas.com>

kjournald starting.  Commit interval 5 seconds
EXT3 FS on sda1, internal journal
EXT3-fs: recovery complete.
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting.  Commit interval 5 seconds
EXT3 FS on sdb1, internal journal
EXT3-fs: recovery complete.
EXT3-fs: mounted filesystem with ordered data mode.
mtrr: type mismatch for d8000000,4000000 old: write-back new: write-combining
UDP: short packet: From 169.254.100.100:68 47802/556 to 255.255.255.255:67
UDP: short packet: From 169.254.100.100:68 47802/556 to 255.255.255.255:67
UDP: short packet: From 169.254.100.100:68 47802/556 to 255.255.255.255:67

df下面是服务器磁盘镜像分区
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/cciss/c0d0p3     50394996  26183916  21651124  55% /
/dev/cciss/c0d0p2     50394996   4389528  43445512  10% /app
/dev/cciss/c0d0p6     38123912    105564  36081716   1% /backup
/dev/cciss/c0d0p1       101086     17912     77955  19% /boot
下面两个是磁盘柜
/dev/sda1            185778200 148002104  28339116  84% /data
/dev/sdb1            102584600  77341964  20031556  80% /databk