root filesystem na usb

[Pavel Benisek]

dobry den,
mam root filesystem ext3 pripojeny na USB2 mass storage (ide disk v 
ramecku).
kazdou chvili se pri cteni nebo ukladani (nejsem schopen odhadnout) 
stane, ze kontrolka zacte blikat (asi 5x = 10x cca v pul vterinovych 
intervalech) a asi na pul minuty se hdd odmlci. Zrejme nez vyprsi 
timeout.

Podle hlasek v logu mi pripada, ze jde o vadne sektory na disku, ale 
kdyz to projedu fsck, nahlasi clean a na jinem pocitaci je to bez 
problemu. Bios jsem zkousel updatovat a nepomohlo to.

Netusite kam dal se podivat, nebo co dalsiho zkusit?

vypis logu rika:
Jun  8 21:21:02 nb SCSI error : <0 0 0 0> return code = 0x70000
Jun  8 21:21:02 nb end_request: I/O error, dev sda, sector 15563071
Jun  8 21:28:25 nb SCSI error : <0 0 0 0> return code = 0x6000000
Jun  8 21:28:25 nb end_request: I/O error, dev sda, sector 15563079
Jun  8 21:28:25 nb SCSI error : <0 0 0 0> return code = 0x70000
Jun  8 21:28:25 nb end_request: I/O error, dev sda, sector 15563087
Jun  8 21:28:25 nb SCSI error : <0 0 0 0> return code = 0x70000
Jun  8 21:28:25 nb end_request: I/O error, dev sda, sector 15563095
Jun  8 21:28:25 nb SCSI error : <0 0 0 0> return code = 0x6000000
Jun  8 21:28:25 nb end_request: I/O error, dev sda, sector 15563103
Jun  8 21:28:25 nb SCSI error : <0 0 0 0> return code = 0x70000
Jun  8 21:28:25 nb end_request: I/O error, dev sda, sector 15563111
Jun  8 21:28:25 nb SCSI error : <0 0 0 0> return code = 0x6000000
Jun  8 21:28:25 nb end_request: I/O error, dev sda, sector 15563119
Jun  8 21:28:25 nb SCSI error : <0 0 0 0> return code = 0x70000
Jun  8 21:28:25 nb end_request: I/O error, dev sda, sector 15563103

dekuji za pripadne napady 

Pavel Benisek