收到服务器报警，查看/var/log/messages 中很多类似下面的日志：
Dec  9 00:03:22 kernel: mptscsih: ioc0: attempting task abort! (sc=ffff81007ec8bb00)
Dec  9 00:03:22 kernel: sd 0:0:0:0:
Dec  9 00:03:22 kernel:         command: Read(10): 28 00 05 4c 03 6a 00 01 00 00
Dec  9 00:03:23 kernel: mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000)
Dec  9 00:03:23 kernel: mptscsih: ioc0: task abort: SUCCESS (sc=ffff81007ec8bb00)
Dec  9 00:03:33 kernel: mptscsih: ioc0: attempting task abort! (sc=ffff81007ec8bb00)
Dec  9 00:03:33 kernel: sd 0:0:0:0:
Dec  9 00:03:33 kernel:         command: Test Unit Ready: 00 00 00 00 00 00
Dec  9 00:03:33 kernel: mptbase: ioc0: LogInfo(0x31130000): Originator={PL}, Code={IO Not Yet Executed}, SubCode(0x0000)
Dec  9 00:03:33 kernel: mptscsih: ioc0: task abort: SUCCESS (sc=ffff81007ec8bb00)
Dec  9 00:03:33 kernel: mptscsih: ioc0: attempting task abort! (sc=ffff810077e51380)
Dec  9 00:03:33 kernel: sd 0:0:0:0:

系统状态：
uname -a
Linux 2.6.18-53.1.13.el5 #1 SMP Tue Feb 12 13:02:30 EST 2008 x86_64 x86_64 x86_64 GNU/Linux

cat /etc/redhat-release
CentOS release 5 (Final)

#smartctl -a /dev/sda
smartctl version 5.36 [x86_64-redhat-linux-gnu] Copyright (C) 2002-6 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

Device: HP       DF072A9844       Version: HPD0
Serial number: DQA2P6B00GMC0648
Device type: disk
Transport protocol: SAS
Local Time is: Tue Dec  9 09:33:35 2008 CST
Device supports SMART and is Enabled
Temperature Warning Enabled
SMART Health Status: OK

Current Drive Temperature:     33 C
Drive Trip Temperature:        65 C
Manufactured in week 48 of year 2006
Current start stop count:      6 times
Recommended maximum start stop count:  10000 times
Elements in grown defect list: 0

Error counter log:
           Errors Corrected by           Total   Correction     Gigabytes    Total
               ECC          rereads/    errors   algorithm      processed    uncorrected
           fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
read:          0        0         0         0          0          0.000           0
write:         0        0         0         0          0          0.000           0

Non-medium error count:     2293
No self-tests have been logged
Long (extended) Self Test duration: 1815 seconds [30.2 minutes]

找了半天并没有看出有什么异常来，网上有些资料说是操作系统内核对SAS硬盘的支持不好，也有把责任归咎于dell服务器，但是我的机器可是HP滴！
HP官方站上找到了一点信息  是关于磁带备份操作中的注意事项。

再观察几天，也继续搜索一下解决方案，如果还没有结果的话，我准备重做系统了，降低内核版本，装回32bit再试试看。

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