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USB external hard disk becomes read only after running for a while.
Hi
I am using 2 Seagate usb harddisk of 1TB size each for taking backups, connected to my dell desktop through USB . Even after mounting the disks as rw and that being shown in the mount command , the disks become readonly after some duration of running. This duration is anything between 15 mins to upwards.
I have tried mounting them with default as well as explicit option of read/write and all, it works fine for sometime , then goes readonly.
The details of the OS and stuff are as below
Kernel
2.6.18-128.el5PAE
Version
Red Hat Enterprise Linux Server release 5.3 (Tikanga)
lsusb output
Bus 001 Device 009: ID 0bc2:3008 Seagate RSS LLC
Bus 001 Device 008: ID 0bc2:3008 Seagate RSS LLC
mount output
/dev/sdb1 on /backup type ext3 (rw)
/dev/sdc1 on /backup2 type ext3 (rw)
Also sometimes any one disk automatically changes its drive letter from sdb/sdc to sdd thus making it unaccessible.
dmesg output
Initializing USB Mass Storage driver...
scsi2 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 2
usb-storage: waiting for device to settle before scanning
scsi3 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 4
usb-storage: waiting for device to settle before scanning
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usb-storage: device scan complete
usb-storage: device scan complete
usb 1-3: USB disconnect, address 2
usb 3-2: USB disconnect, address 2
usb 3-2: new low speed USB device using uhci_hcd and address 3
usb 3-2: configuration #1 chosen from 1 choice
input: USB Optical Mouse as /class/input/input4
input: USB HID v1.11 Mouse [USB Optical Mouse] on usb-0000:00:1d.1-2
usb 1-3: new high speed USB device using ehci_hcd and address 6
usb 1-3: configuration #1 chosen from 1 choice
scsi4 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb 1-3: USB disconnect, address 6
usb 1-3: new high speed USB device using ehci_hcd and address 7
usb 1-3: configuration #1 chosen from 1 choice
scsi5 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 7
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb 1-3: USB disconnect, address 7
usb 1-7: USB disconnect, address 4
usb 1-3: new high speed USB device using ehci_hcd and address 8
usb 1-3: configuration #1 chosen from 1 choice
scsi6 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 8
usb-storage: waiting for device to settle before scanning
usb 1-7: new high speed USB device using ehci_hcd and address 9
usb 1-7: configuration #1 chosen from 1 choice
scsi7 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 9
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb-storage: device scan complete
Please let me know if any other output is required.
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Has no one faced or resolved this before.. ! ! !
