Tenho identificado este mesmo evento (http://lists.centos.org/pipermail/centos-pt-br/2014-April/005256.html) em um dos meus servidores de aplicação:

CentOS release 6.4 (Final)
mptlinux-3.04.20
Fusion MPT base driver
Fusion MPT SPI host driver


Nov 25 14:33:37 kernel: mptscsih: ioc0: attempting task abort! (sc=ffff880218f151c0)
Nov 25 14:33:37 kernel: sd 2:0:0:0: [sda] CDB: Read(10): 28 00 00 3e 68 b0 00 00 10 00
Nov 25 14:33:37 kernel: mptscsih: ioc0: task abort: SUCCESS (rv=2002) (sc=ffff880218f151c0)
Nov 25 14:39:14 kernel: mptscsih: ioc0: attempting task abort! (sc=ffff88096c4fe5c0)