Fresh install of CentOS 4.4. uname -a, lspci, & lsusb output at bottom. I insert my 256MB USB key, light goes on, then off. Never mounts. Here's the end of dmesg: usb 1-1: new full speed USB device using address 11 scsi7 : SCSI emulation for USB Mass Storage devices Vendor: Generic Model: STORAGE DEVICE Rev: 1.02 Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 512000 512-byte hdwr sectors (262 MB) sda: Write Protect is off sda: Mode Sense: 02 00 00 00 sda: assuming drive cache: write through SCSI device sda: 512000 512-byte hdwr sectors (262 MB) sda: Write Protect is off sda: Mode Sense: 02 00 00 00 sda: assuming drive cache: write through sda: sda1 Attached scsi removable disk sda at scsi7, channel 0, id 0, lun 0 USB Mass Storage device found at 11 [root /]# But there is a /dev/sda1. Then after a few minutes, I get: scsi: Device offlined - not ready after error recovery: host 7 channel 0 id 0 lun 0 7:0:0:0: Illegal state transition deleted->offline Badness in scsi_device_set_state at drivers/scsi/scsi_lib.c:1702 [<f88246d9>] scsi_device_set_state+0xd2/0xdd [scsi_mod] [<f8822903>] scsi_eh_offline_sdevs+0x49/0x5e [scsi_mod] [<f8822de9>] scsi_unjam_host+0x15a/0x16b [scsi_mod] [<f8822f0c>] scsi_error_handler+0x112/0x15a [scsi_mod] [<f8822dfa>] scsi_error_handler+0x0/0x15a [scsi_mod] [<c01041f5>] kernel_thread_helper+0x5/0xb SCSI error : <7 0 0 0> return code = 0x10000 end_request: I/O error, dev sda, sector 511776 Buffer I/O error on device sda1, logical block 63968 scsi7 (0:0): rejecting I/O to dead device Buffer I/O error on device sda1, logical block 63969 Buffer I/O error on device sda1, logical block 63970 Buffer I/O error on device sda1, logical block 63971 Buffer I/O error on device sda1, logical block 63972 Buffer I/O error on device sda1, logical block 63973 Buffer I/O error on device sda1, logical block 63974 Buffer I/O error on device sda1, logical block 63975 Buffer I/O error on device sda1, logical block 63976 Buffer I/O error on device sda1, logical block 63977 Buffer I/O error on device sda1, logical block 63978 Buffer I/O error on device sda1, logical block 63979 Buffer I/O error on device sda1, logical block 63980 Buffer I/O error on device sda1, logical block 63981 Buffer I/O error on device sda1, logical block 63982 Buffer I/O error on device sda1, logical block 63983 scsi7 (0:0): rejecting I/O to dead device Buffer I/O error on device sda1, logical block 63968 scsi7 (0:0): rejecting I/O to dead device Buffer I/O error on device sda1, logical block 0 scsi7 (0:0): rejecting I/O to dead device Buffer I/O error on device sda1, logical block 64 Buffer I/O error on device sda1, logical block 65 Buffer I/O error on device sda1, logical block 66 Buffer I/O error on device sda1, logical block 67 scsi7 (0:0): rejecting I/O to dead device Buffer I/O error on device sda1, logical block 64 usb 1-1: new full speed USB device using address 12 scsi8 : SCSI emulation for USB Mass Storage devices Vendor: Model: Rev: Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 512000 512-byte hdwr sectors (262 MB) sda: assuming drive cache: write through SCSI device sda: 512000 512-byte hdwr sectors (262 MB) sda: assuming drive cache: write through sda: sda1 Attached scsi disk sda at scsi8, channel 0, id 0, lun 0 USB Mass Storage device found at 12 usb 1-1: reset full speed USB device using address 12 Where do I start? [root /]# uname -a Linux 2.6.9-42.0.8.ELsmp #1 SMP Tue Jan 30 12:33:47 EST 2007 i686 i686 i386 GNU/Linux [root /]# /sbin/lspci 00:00.0 Host bridge: Intel Corporation 82860 860 (Wombat) Chipset Host Bridge (MCH) (rev 04) 00:01.0 PCI bridge: Intel Corporation 82850 850 (Tehama) Chipset AGP Bridge (rev 04) 00:02.0 PCI bridge: Intel Corporation 82860 860 (Wombat) Chipset AGP Bridge (rev 04) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 04) 00:1f.0 ISA bridge: Intel Corporation 82801BA ISA Bridge (LPC) (rev 04) 00:1f.1 IDE interface: Intel Corporation 82801BA IDE U100 (rev 04) 00:1f.2 USB Controller: Intel Corporation 82801BA/BAM USB (Hub #1) (rev 04) 00:1f.3 SMBus: Intel Corporation 82801BA/BAM SMBus (rev 04) 00:1f.4 USB Controller: Intel Corporation 82801BA/BAM USB (Hub #2) (rev 04) 00:1f.5 Multimedia audio controller: Intel Corporation 82801BA/BAM AC'97 Audio (rev 04) 01:00.0 VGA compatible controller: nVidia Corporation NV15GL [Quadro2 Pro] (rev a4) 02:1f.0 PCI bridge: Intel Corporation 82806AA PCI64 Hub PCI Bridge (rev 03) 03:00.0 PIC: Intel Corporation 82806AA PCI64 Hub Advanced Programmable Interrupt Controller (rev 01) 03:0e.0 SCSI storage controller: Adaptec AIC-7892P U160/m (rev 02) 04:0b.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78) 04:0c.0 FireWire (IEEE 1394): Texas Instruments TSB12LV26 IEEE-1394 Controller (Link) 04:0d.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 08) 04:0d.1 Input device controller: Creative Labs SB Live! Game Port (rev 08) 04:0e.0 VGA compatible controller: Matrox Graphics, Inc. MGA 2164W [Millennium II] [root /]# /sbin/lsusb Bus 002 Device 001: ID 0000:0000 Bus 001 Device 003: ID 046d:c508 Logitech, Inc. Bus 001 Device 001: ID 0000:0000 [root /]# -- --- David Woyciesjes