Code:
2011-04-12 01:59:10 scsi cmnd aborted, scsi_cmnd(0xffff88012c6d4700), cmnd[0x8a,0x 0,0x 0,0x 0,0x 0,0x 1,0xb0,0x9e,0xf8,0x 0,0x... (0/1)
2011-04-12 01:58:40 scsi cmnd aborted, scsi_cmnd(0xffff88012c6d4340), cmnd[0x8a,0x 0,0x 0,0x 0,0x 0,0x 1,0xb0,0x9e,0xf7,0x 0,0x... (1/1)
2011-04-12 01:58:10 scsi cmnd aborted, scsi_cmnd(0xffff88012c6d45c0), cmnd[0x8a,0x 0,0x 0,0x 0,0x 0,0x 1,0xb0,0x9e,0xf6,0x 0,0x... (1/1)
2011-04-12 01:57:40 scsi cmnd aborted, scsi_cmnd(0xffff88012c6d40c0), cmnd[0x8a,0x 0,0x 0,0x 0,0x 0,0x 1,0xb0,0x9e,0xf5,0x 0,0x... (0/1)
This points to an hardware error. The raid controller has been replaced so it seems the backplane is not working properly.