Failure again, while copying from a welland psc (power saving caddy) to a normal firewire caddy. 5gb into copy.

Here is the strange ls output:

root@cesspit:/mnt# ls -la usb2/
total 4
drwxrwxrwx 1 mem  root 4096 2008-05-03 14:02 .
drwxr-xr-x 8 root root   88 2008-05-01 21:08 ..
drwxrwxrwx 1 mem  root    0 2008-05-02 00:01 Media
?--------- ? ?    ?       ?                ? usb2/Incomming
?--------- ? ?    ?       ?                ? usb2/SuperCopier2beta1-9.exe
root@cesspit:/mnt# cat /etc/fstab | grep usb2
LABEL=sleepy2   /mnt/usb2       ntfs-3g defaults,uid=1000       0 0

var/log/messages output:

May  3 13:59:56 cesspit kernel: [167270.573707] XFS mounting filesystem sdb1
May  3 14:07:33 cesspit kernel: [167789.981969] usb 2-4: reset high speed USB device using ehci_hcd and address 17
May  3 14:10:19 cesspit kernel: [167973.291042] usb 2-4: reset high speed USB device using ehci_hcd and address 17
May  3 14:10:49 cesspit kernel: [168009.169512] usb 2-4: reset high speed USB device using ehci_hcd and address 17
May  3 14:10:59 cesspit kernel: [168021.281996] usb 2-4: reset high speed USB device using ehci_hcd and address 17
May  3 14:11:15 cesspit kernel: [168040.401488] usb 2-4: reset high speed USB device using ehci_hcd and address 17
May  3 14:11:16 cesspit kernel: [168040.778268] usb 2-4: reset high speed USB device using ehci_hcd and address 17
May  3 14:11:26 cesspit kernel: [168052.821977] usb 2-4: reset high speed USB device using ehci_hcd and address 17
May  3 14:11:26 cesspit kernel: [168053.058472] sd 10:0:0:0: Device offlined - not ready after error recovery
May  3 14:11:26 cesspit kernel: [168053.058508] sd 10:0:0:0: [sdc] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK,SUGGEST_OK
May  3 14:11:26 cesspit kernel: [168053.058638] sd 10:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK
May  3 14:11:39 cesspit kernel: [168068.578563] printk: 28 messages suppressed.

While watching the copy, I noticed the psc power down during a copy, the kde copy dialog stalled while the messages "usb 2-4: reset high speed USB device using ehci_hcd and address 17" were printing to var/log. The copy did resume once, picked back up normal speed but powered down again a 2nd time and failed to come back online.

trying to remount the device has been working over the past few days but not today, output (note I use labels for mounting):

root@cesspit:/mnt# umount usb2
root@cesspit:/mnt# mount usb2
Error opening '/dev/sdc1': No such device or address
Failed to mount '/dev/sdc1': No such device or address
You seem to have a SoftRAID/FakeRAID hardware and must use an activated,
different device under /dev/mapper/, (e.g. /dev/mapper/nvidia_eahaabcc1)
to mount NTFS. Please see the 'dmraid' documentation for help.

Power cycling fixed the device. I will note this drive is a bit old and noisy but has never presented any issues when in use on my fileserver (connected internally). The issues are also not present in windows xp on any machines. I would suspect ntfs to be contributing to the issue but the other identical psc has the same issue though it doesnt not need to be power cycled as often. 

I did contact welland regarding the issue and the had this to say:

Dear Customer,
 
Thanks for your mail and purchased our product.
Pls. use our power saving AP tool to control the time of power down.
 
By the way, may I know where are you from? Thanks.
 

Thanks & Best regards,

Jing Lee / Sales department
Welland Industrial Co., Ltd
Tel: +886-2-8285-2345  ext. 18
Fax: +886-2-8282-5000, 8282-7000
E-mail: -
Web: www.welland.com.tw

-EOF-

I does seem they didnt realise I am in linux but I will plug these psc into a windows pc, use the tool to raise the timeout and retry. The latest kernel does not seem to fix the issue after all but it does seem an improvement.