Got no reply from linux-usb. So trying here. In the past I was able to mount it as "WriteProtect is off"....but one day....suddenly it became "on" on two of my machine, but the others like 3 still "off". So right now the status is as follows: usb-storage: waiting for device to settle before scanning usbcore: registered new interface driver usb-storage USB Mass Storage support registered. scsi 6:0:0:0: Direct-Access WD 1600BEAExternal 1.02 PQ: 0 ANSI: 0 sd 6:0:0:0: [sdc] 312581808 512-byte hardware sectors (160042 MB) sd 6:0:0:0: [sdc] Write Protect is on sd 6:0:0:0: [sdc] Mode Sense: 12 a1 9e af sd 6:0:0:0: [sdc] Assuming drive cache: write through sd 6:0:0:0: [sdc] 312581808 512-byte hardware sectors (160042 MB) sd 6:0:0:0: [sdc] Write Protect is on sd 6:0:0:0: [sdc] Mode Sense: 12 a1 9e af sd 6:0:0:0: [sdc] Assuming drive cache: write through sdc: sdc1 sdc2 sdc3 < sdc5 > sdc4 sd 6:0:0:0: [sdc] Attached SCSI disk sd 6:0:0:0: Attached scsi generic sg2 type 0 usb-storage: device scan complete But when u plug out and insert into another machine, it may be detected as "off", why? With this writeprotect on, there is no way i can mount it for writing. Appreciate your answer very much. THanks. -- Regards, Peter Teoh -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html