cannot mount ACOMDATA external USB drive

[David Vincent]

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Hi Folks.

Last week I bought a new Seagate 500gb SATA2 drive and an ACOMDATA
enclosure for it.  When it arrived and I put it together, Ubuntu
recognized the drive right away and I was able to partition the drive
and copy my stuff to it.

However now when I plug it in it does not mount, instead I get messages
like this in my logs:

> Jun 26 06:29:05 dolph kernel: [ 1418.274379] usb 5-1: new high speed USB device using ehci_hcd and address 4
> Jun 26 06:29:05 dolph kernel: [ 1418.406694] usb 5-1: configuration #1 chosen from 1 choice
> Jun 26 06:29:05 dolph kernel: [ 1418.497570] usbcore: registered new interface driver libusual
> Jun 26 06:29:05 dolph kernel: [ 1418.528775] Initializing USB Mass Storage driver...
> Jun 26 06:29:05 dolph kernel: [ 1418.531384] scsi4 : SCSI emulation for USB Mass Storage devices
> Jun 26 06:29:05 dolph kernel: [ 1418.532975] usbcore: registered new interface driver usb-storage
> Jun 26 06:29:05 dolph kernel: [ 1418.532984] USB Mass Storage support registered.
> Jun 26 06:29:17 dolph kernel: [ 1430.114507] usb 5-1: reset high speed USB device using ehci_hcd and address 4
> Jun 26 06:29:18 dolph kernel: [ 1430.659774] usb 5-1: reset high speed USB device using ehci_hcd and address 4
> Jun 26 06:29:18 dolph kernel: [ 1431.203302] usb 5-1: reset high speed USB device using ehci_hcd and address 4
> Jun 26 06:29:19 dolph kernel: [ 1431.724885] usb 5-1: reset high speed USB device using ehci_hcd and address 4
> Jun 26 06:29:19 dolph kernel: [ 1432.130004] usb 5-1: USB disconnect, address 4
> Jun 26 06:29:19 dolph kernel: [ 1432.130368] scsi 4:0:0:0: Device offlined - not ready after error recovery
> Jun 26 06:29:19 dolph kernel: [ 1432.239494] usb 5-1: new high speed USB device using ehci_hcd and address 5
> Jun 26 06:29:20 dolph kernel: [ 1432.783015] usb 5-1: new high speed USB device using ehci_hcd and address 6
> Jun 26 06:29:20 dolph kernel: [ 1433.325540] usb 5-1: new high speed USB device using ehci_hcd and address 7
> Jun 26 06:29:21 dolph kernel: [ 1433.843138] usb 5-1: new high speed USB device using ehci_hcd and address 8

lsusb says:

> Bus 005 Device 009: ID 0c0b:b157 Dura Micro, Inc. (Acomdata)

These bugs aren't any help so far and are pretty old too:

> https://bugs.launchpad.net/ubuntu/+bug/18877
> https://launchpad.net/ubuntu/+source/linux-source-2.6.15/+bug/23346

"remove any jumpers from the drive" - but this is SATA2 and not
jumpered.  So now i'm at a bit of a loss for what to do next.

To further the weirdness to successfully get it to mount it seems I need
to hibernate my machine, turn on the drive, then resume.  Then it is
mounted.  fsck says it is fine.

I've tried a few other machines and get the same messages in the system
logs but on some of them the hibernate-to-mount trick does not work.
The same problem happens on my Fedora 9 machine too.

Anyone have any tips to offer?

- -d


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