I am seeing lots of errors in /var/log/messages after modprobe i2o_scsi. /var/log/messages -------------------------------- <snip> kernel: scsi-osm: SCSI error 05001200 last message repeated 14 times <snip> kernel: scsi-osm: SCSI error 05001200 last message repeated 14 times <snip> kernel: scsi-osm: SCSI error 05000002 kernel: 70 kernel: 00 kernel: 06 kernel: 00 last message repeated 3 times kernel: 14 kernel: 00 last message repeated 3 times kernel: 29 bucky kernel: 00 last message repeated 8 times kernel: 01 kernel: 2a kernel: 52 kernel: f0 kernel: 00 kernel: 00 kernel: 80 kernel: 00 last message repeated 6 times kernel: d0 <snip> kernel: st0: Block limits 1 - 16777215 bytes. kernel: Buffer I/O error on device sda1, logical block 30724160 kernel: Buffer I/O error on device sda1, logical block 30724161 kernel: Buffer I/O error on device sda1, logical block 30724162 kernel: Buffer I/O error on device sda1, logical block 30724163 kernel: Buffer I/O error on device sda1, logical block 30724164 kernel: Buffer I/O error on device sda1, logical block 30724165 kernel: Buffer I/O error on device sda1, logical block 30724166 kernel: Buffer I/O error on device sda1, logical block 30724167 kernel: Buffer I/O error on device sda1, logical block 30724168 . . . These "Buffer I/O error on device sdaX" keep appearing periodically, where sdaX are disks that are part of my RAID configuration. lsmod shows: <snip> i2o_scsi 11585 0 ext3 117961 5 jbd 59353 1 ext3 i2o_block 16333 7 i2o_core 41949 2 i2o_scsi,i2o_block sd_mod 20289 0 scsi_mod 112136 3 st,i2o_scsi,sd_mod Hardware: Supermicro P4DP6/E7500/Adaptec 7899W Ultra 160 Dual Xeon 2.4 Adaptec 2000S zero-channel RAID controller 32MB (BIOS 1.41 2001/07/13) Sony SDT-11000 DDS-4 68-pin Ultra 2/LVD lspci 00:00.0 Host bridge: Intel Corp. E7500 Memory Controller Hub (rev 02) 00:00.1 Class ff00: Intel Corp. E7500/E7501 Host RASUM Controller (rev 02) 00:02.0 PCI bridge: Intel Corp. E7500/E7501 Hub Interface B PCI-to-PCI Bridge (rev 02) 00:03.0 PCI bridge: Intel Corp. E7500/E7501 Hub Interface C PCI-to-PCI Bridge (rev 02) 00:1d.0 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #1) (rev 02) 00:1d.1 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #2) (rev 02) 00:1d.2 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #3) (rev 02) 00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 42) 00:1f.0 ISA bridge: Intel Corp. 82801CA LPC Interface Controller (rev 02) 00:1f.1 IDE interface: Intel Corp. 82801CA Ultra ATA Storage Controller (rev 02) 00:1f.3 SMBus: Intel Corp. 82801CA/CAM SMBus Controller (rev 02) 01:1c.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 03) 01:1d.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 03) 01:1e.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 03) 01:1f.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 03) 04:1c.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 03) 04:1d.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 03) 04:1e.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 03) 04:1f.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 03) 05:01.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 07) 05:01.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 07) 05:02.0 PCI bridge: Hint Corp HB6 Universal PCI-PCI bridge (non-transparent mode) (rev 13) 05:03.0 Ethernet controller: Intel Corp. 82544EI Gigabit Ethernet Controller (Copper) (rev 02) 06:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 85) 07:01.0 RAID bus controller: Adaptec (formerly DPT) SmartRAID V Controller (rev 01) 08:02.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0d) 08:03.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 0d) -Eric -- Eric Hoeve fedora at ehoeve dot com