Problem with External HDD

Hello all,
Since I haven't receive a solution in the corresponding freecom forums, I decided to post my topic here.

So...

Here is my setup:
I have all-in-one device from freecom, called "FSG WLAN"(ARM based) http://www.openfsg.com/index.php/FSG connected to Samsung Story 1.5GB external USB HDD having dedicated power supply, which seems to cause me problems from time to time.

The problem:
After several hours of transferring files over ssh and samba to the external HDD, suddenly the FSG generates an error and the external HDD gets remounted in read-only mode.
According to the logs, the reason for that error should be: "<6>sd 3:0:0:0: SCSI error: return code = 0x00070000"
I have searched in google but I cannot find any feasible solution.

~ # uname -a
Linux FSG 2.6.18 #174 Wed Mar 12 17:13:32 UTC 2008 armv5teb unknown
----------------------------------------------------------
~ # mount
/dev/root on / type reiserfs (rw,noatime,nodiratime)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
none on /proc/bus/usb type usbfs (rw)
none on /ramdisk type tmpfs (rw)
/dev/sda4 on /home type reiserfs (rw,noatime,nodiratime)
/dev/sda4 on /opt type reiserfs (rw,noatime,nodiratime)
/dev/sdb1 on /home/Samsung_STORY_Station_-0000 type vfat (rw,sync,noatime,nodiratime,fmask=0000,dmask=0000, codepage=cp437,iocharset=iso8859-1)
/dev/sdb2 on /home/Samsung_STORY_Station_-0000-1 type ext3 (rw,sync,noatime,nodiratime,data=ordered)
----------------------------------------------------------
~ # dmesg
reset high speed USB device using ehci_hcd and address 2
<6>sd 3:0:0:0: SCSI error: return code = 0x00070000
<4>end_request: I/O error, dev sdb, sector 2825376576
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>sd 3:0:0:0: SCSI error: return code = 0x00070000
<4>end_request: I/O error, dev sdb, sector 2825376576
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>sd 3:0:0:0: SCSI error: return code = 0x00070000
<4>end_request: I/O error, dev sdb, sector 2825784520
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>sd 3:0:0:0: SCSI error: return code = 0x00070000
<4>end_request: I/O error, dev sdb, sector 2825784536
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>sd 3:0:0:0: SCSI error: return code = 0x00070000
<4>end_request: I/O error, dev sdb, sector 2825784536
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>usb 1-5: reset high speed USB device using ehci_hcd and address 2
<6>sd 3:0:0:0: SCSI error: return code = 0x00070000
......................
A lot of lines like previous ones....
......................
<2>ext3_abort called.
<2>EXT3-fs error (device sdb2): ext3_journal_start_sb: Detected aborted journal
<2>Remounting filesystem read-only
----------------------------------------------------------

I will appreciate any ideas.
If you don't the solution, but know a more proper place(forum), please share that infromation with me.

Sorry, I don't have a definite answer for that.
But I've experienced similar problems with hard disk that seemed to work fine for a while then fail because of power supply issues. However, in your case this is unlikely since your HDD has its own power supply.

Yepp, I am prety sure that the problems are not caused by the power supply.
I think that they are produced by the USB drivers... but I haven't found a way to fix it, yet.

I would confirm that there is no drive-hardware issue first...

running it for a LONG time with alot of accesses on a different source/system,
swapping out the P/S with one of the same values,

It is possible that this drive has become 'heat sensitive' and is failing due to 'internal issues'.

... my 2cts.