我的硬盘是否挂了？

Innuendo

系统用着用着突然不动了，等了半天只好按reset 重启，加载内核时到磁盘检查处就停了，我怀疑我的sdb有问题（sdb是我的高清bt下载盘），关机后把sdb拨下再开机进系统正常了，注释掉 fstab 中sdb5（sdb只分了一个分区为sdb5），关机再把 sdb 插上进系统，手工 mount 也挂不上：
[PHP]sudo mount -t ext3 /dev/sdb5 movz
mount: wrong fs type, bad option, bad superblock on /dev/sdb5,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so[/PHP]

截一段系统日志：
[PHP]1799 Apr 21 04:27:31 xnix kernel: ata1.01: BMDMA stat 0x65
1800 Apr 21 04:27:31 xnix kernel: ata1.01: cmd c8/00:20:7e:00:00/00:00:00:00:00/f0 tag 0 dma 16384 in
1801 Apr 21 04:27:31 xnix kernel: res 51/40:00:98:00:00/00:00:00:00:00/f0 Emask 0x9 (media error)
1802 Apr 21 04:27:31 xnix kernel: ata1.01: status: { DRDY ERR }
1803 Apr 21 04:27:31 xnix kernel: ata1.01: error: { UNC }
1804 Apr 21 04:27:31 xnix kernel: end_request: I/O error, dev sdb, sector 152
1805 Apr 21 04:27:31 xnix kernel: Buffer I/O error on device sdb5, logical block 26
1806 Apr 21 04:27:31 xnix kernel: Buffer I/O error on device sdb5, logical block 27
1807 Apr 21 04:27:31 xnix kernel: Buffer I/O error on device sdb5, logical block 28
1808 Apr 21 04:27:31 xnix kernel: Buffer I/O error on device sdb5, logical block 29
1809 Apr 21 04:27:31 xnix kernel: Buffer I/O error on device sdb5, logical block 30
1810 Apr 21 04:27:31 xnix kernel: Buffer I/O error on device sdb5, logical block 31
1811 Apr 21 04:28:24 xnix kernel: ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0[/PHP]
又上网 g了一下，装上 badblocks 检查，似乎有一堆坏道了。用linux几年来还没遇到过硬盘挂的情况，所以不太确定是否是这块硬盘牺牲了，能否修复？现在最大的问题是，因为上面我还有些东西没备份下来。

Innuendo

怪了，换了块硬盘挂上去，又下载了一部电影，最后电影完成后自动移动目录时，到最后一个block了，utorrent 突然提示Not ready，然后系统日志又报错了，是不是最新有什么包有问题？

[PHP]11331 Apr 21 11:03:42 xnix kernel: ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
11332 Apr 21 11:03:42 xnix kernel: ata1.01: BMDMA stat 0x64
11333 Apr 21 11:03:42 xnix kernel: ata1.01: cmd c8/00:08:26:0c:d3/00:00:00:00:00/f1 tag 0 dma 4096 in
11334 Apr 21 11:03:42 xnix kernel: res 51/40:00:26:0c:d3/00:00:00:00:00/f1 Emask 0x9 (media error)
11335 Apr 21 11:03:42 xnix kernel: ata1.01: status: { DRDY ERR }
11336 Apr 21 11:03:42 xnix kernel: ata1.01: error: { UNC }
11337 Apr 21 11:03:42 xnix kernel: ata1: nv_mode_filter: 0x3f01f&0x3f01f->0x3f01f, BIOS=0x3f000 (0xc6c60000) ACPI=0x3f01f (20:20:0x1f)
11338 Apr 21 11:03:42 xnix kernel: ata1: nv_mode_filter: 0x3f01f&0x3f01f->0x3f01f, BIOS=0x3f000 (0xc6c60000) ACPI=0x3f01f (20:20:0x1f)
11339 Apr 21 11:03:42 xnix kernel: ata1.00: configured for UDMA/100
11340 Apr 21 11:03:42 xnix kernel: ata1.01: configured for UDMA/100
11341 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Unhandled sense code
11342 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08
11343 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Sense Key : 0x3 [current] [descriptor]
11344 Apr 21 11:03:42 xnix kernel: Descriptor sense data with sense descriptors (in hex):
11345 Apr 21 11:03:42 xnix kernel: 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
11346 Apr 21 11:03:42 xnix kernel: 01 d3 0c 26
11347 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] ASC=0x11 ASCQ=0x4
11348 Apr 21 11:03:42 xnix kernel: end_request: I/O error, dev sdb, sector 30608422
11349 Apr 21 11:03:42 xnix kernel: ata1: EH complete
11350 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] 40021632 512-byte hardware sectors: (20.4 GB/19.0 GiB)
11351 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Write Protect is off
11352 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Mode Sense: 00 3a 00 00
11353 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
11354 Apr 21 11:03:42 xnix kernel: sd 0:0:0:0: [sda] 78165360 512-byte hardware sectors: (40.0 GB/37.2 GiB)
11355 Apr 21 11:03:42 xnix kernel: sd 0:0:0:0: [sda] Write Protect is off
11356 Apr 21 11:03:42 xnix kernel: sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
11357 Apr 21 11:03:42 xnix kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
11358 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] 40021632 512-byte hardware sectors: (20.4 GB/19.0 GiB)
11359 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Write Protect is off
11360 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Mode Sense: 00 3a 00 00
11361 Apr 21 11:03:42 xnix kernel: sd 0:0:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA[/PHP]

Innuendo

tnnd， 重新分区，格式化后用 e2fsck 一检查又啥都没有了，mount 也正常了。**，数据被迫全清了。遇到这事真是见鬼了。