alright, here is exactly the message, its really long, but i didnt know what info was important:
[root@localhost root]# dmesg
ting I/O to dead device
FAT: Directory bread(block 496) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 497) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 49

failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 499) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 500) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 501) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 502) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 503) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 504) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 505) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 506) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 507) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 50

failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 509) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 510) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 511) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 512) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 513) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 514) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 515) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 516) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 517) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 51

failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 519) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 520) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 521) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 522) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 523) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 524) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 525) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 526) failed
usb 5-7: USB disconnect, address 5
libata version 1.02 loaded.
ata_piix version 1.02
ACPI: PCI interrupt 0000:00:1f.2[A] -> GSI 10 (level, low) -> IRQ 10
PCI: Setting latency timer of device 0000:00:1f.2 to 64
ata1: SATA max UDMA/133 cmd 0xEC00 ctl 0xE802 bmdma 0xDC00 irq 10
ata2: SATA max UDMA/133 cmd 0xE400 ctl 0xE002 bmdma 0xDC08 irq 10
ata1: SATA port has no device.
scsi15 : ata_piix
ata2: SATA port has no device.
scsi16 : ata_piix
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: Device is in legacy mode, falling back to 2.x
agpgart: Putting AGP V2 device at 0000:00:00.0 into 1x mode
agpgart: Putting AGP V2 device at 0000:01:00.0 into 1x mode
usb 5-7: new high speed USB device using address 6
libata version 1.02 loaded.
ata_piix version 1.02
ACPI: PCI interrupt 0000:00:1f.2[A] -> GSI 10 (level, low) -> IRQ 10
PCI: Setting latency timer of device 0000:00:1f.2 to 64
ata1: SATA max UDMA/133 cmd 0xEC00 ctl 0xE802 bmdma 0xDC00 irq 10
ata2: SATA max UDMA/133 cmd 0xE400 ctl 0xE002 bmdma 0xDC08 irq 10
ata1: SATA port has no device.
scsi17 : ata_piix
ata2: SATA port has no device.
scsi18 : ata_piix
scsi19 : SCSI emulation for USB Mass Storage devices
Vendor: I0MEGA Model: UMni64MB*IOM2C4 Rev:
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdb: 126976 512-byte hdwr sectors (65 MB)
sdb: Write Protect is off
sdb: Mode Sense: 03 00 00 00
sdb: assuming drive cache: write through
sdb:scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef f8 00 00 08 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126968
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef f9 00 00 07 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126969
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fa 00 00 06 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126970
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fb 00 00 05 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126971
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fc 00 00 04 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126972
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fd 00 00 03 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126973
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fe 00 00 02 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126974
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef ff 00 00 01 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126975
Buffer I/O error on device sdb, logical block 15871
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef f8 00 00 08 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126968
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef f9 00 00 07 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126969
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fa 00 00 06 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126970
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fb 00 00 05 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126971
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fc 00 00 04 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126972
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fd 00 00 03 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126973
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fe 00 00 02 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126974
scsi19: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef ff 00 00 01 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126975
Buffer I/O error on device sdb, logical block 15871
sdb1
Attached scsi removable disk sdb at scsi19, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi19, channel 0, id 0, lun 0, type 0
updfstab: Using deprecated /dev/sg mechanism instead of SG_IO on the actual device
USB Mass Storage device found at 6
usb 5-7: USB disconnect, address 6
libata version 1.02 loaded.
ata_piix version 1.02
ACPI: PCI interrupt 0000:00:1f.2[A] -> GSI 10 (level, low) -> IRQ 10
PCI: Setting latency timer of device 0000:00:1f.2 to 64
ata1: SATA max UDMA/133 cmd 0xEC00 ctl 0xE802 bmdma 0xDC00 irq 10
ata2: SATA max UDMA/133 cmd 0xE400 ctl 0xE002 bmdma 0xDC08 irq 10
ata1: SATA port has no device.
scsi20 : ata_piix
ata2: SATA port has no device.
scsi21 : ata_piix
agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
agpgart: Device is in legacy mode, falling back to 2.x
agpgart: Putting AGP V2 device at 0000:00:00.0 into 1x mode
agpgart: Putting AGP V2 device at 0000:01:00.0 into 1x mode
usb 5-7: new high speed USB device using address 7
scsi22 : SCSI emulation for USB Mass Storage devices
libata version 1.02 loaded.
ata_piix version 1.02
ACPI: PCI interrupt 0000:00:1f.2[A] -> GSI 10 (level, low) -> IRQ 10
PCI: Setting latency timer of device 0000:00:1f.2 to 64
ata1: SATA max UDMA/133 cmd 0xEC00 ctl 0xE802 bmdma 0xDC00 irq 10
ata2: SATA max UDMA/133 cmd 0xE400 ctl 0xE002 bmdma 0xDC08 irq 10
ata1: SATA port has no device.
scsi23 : ata_piix
ata2: SATA port has no device.
scsi24 : ata_piix
Vendor: I0MEGA Model: UMni64MB*IOM2C4 Rev:
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdb: 126976 512-byte hdwr sectors (65 MB)
sdb: Write Protect is off
sdb: Mode Sense: 03 00 00 00
sdb: assuming drive cache: write through
sdb:scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef f8 00 00 08 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126968
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef f9 00 00 07 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126969
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fa 00 00 06 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126970
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fb 00 00 05 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126971
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fc 00 00 04 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126972
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fd 00 00 03 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126973
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fe 00 00 02 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126974
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef ff 00 00 01 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126975
Buffer I/O error on device sdb, logical block 15871
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef f8 00 00 08 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126968
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef f9 00 00 07 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126969
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fa 00 00 06 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126970
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fb 00 00 05 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126971
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fc 00 00 04 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126972
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fd 00 00 03 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126973
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef fe 00 00 02 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126974
scsi22: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 01 ef ff 00 00 01 00
Current sdb: sense key Medium Error
Additional sense: Unrecovered read error
end_request: I/O error, dev sdb, sector 126975
Buffer I/O error on device sdb, logical block 15871
sdb1
Attached scsi removable disk sdb at scsi22, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi22, channel 0, id 0, lun 0, type 0
updfstab: Using deprecated /dev/sg mechanism instead of SG_IO on the actual device
USB Mass Storage device found at 7
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 495) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 496) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 497) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 49

failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 499) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 500) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 501) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 502) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 503) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 504) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 505) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 506) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 507) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 50

failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 509) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 510) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 511) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 512) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 513) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 514) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 515) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 516) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 517) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 51

failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 519) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 520) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 521) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 522) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 523) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 524) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 525) failed
scsi7 (0:0): rejecting I/O to dead device
FAT: Directory bread(block 526) failed