Re: external usb disk error

[Eddy Petrisor <eddy.petrisor@gmail.com>]

peter plessas wrote:
> Hi List,
>
> have been wrking on this for some days now...
>
> i have an external (powered) usb disk (macpower icecube,200G), which i 
> need to attach to my pismo running 2.6.11, Debian testing.
>
> After connecting the drive to the computer, i see the partitions in 
> /proc/partitions:
>
>    8     0  195360984 sda
>    8     1   32764536 sda1
>    8     2   32764567 sda2
>    8     3   32764567 sda3
>    8     4   97064730 sda4
>
> The first three partitions are FAT ones.
>
> but as i try to mount them:
>
>     mount /dev/sda1/ /mnt
>
> i get:
>
>  /dev/sda1 is not a valid block device
>
> and the partitions disappear from the /proc/partitions file, i have to 
> power cycle the disk, and the whole thing starts again.
>
> I had success mounting and using the disk on an x86 debian box.
>
> I am able to mount my memory stick on the pismo.
>
> Any help would be, oh so appreciated!
>
> regards, Peter
>
> ------------------------------------------------------
>
> logs:
>
> dmesg at power up of device:
>
> usb 2-1: new full speed USB device using ohci_hcd and address 14
> scsi3 : SCSI emulation for USB Mass Storage devices
> usb-storage: device found at 14
> usb-storage: waiting for device to settle before scanning
>   Vendor: SAMSUNG   Model: SP2014N           Rev: VC10
>   Type:   Direct-Access                      ANSI SCSI revision: 04
> SCSI device sda: 390721968 512-byte hdwr sectors (200050 MB)
> sda: assuming drive cache: write through
> SCSI device sda: 390721968 512-byte hdwr sectors (200050 MB)
> sda: assuming drive cache: write through
>  /dev/scsi/host3/bus0/target0/lun0: p1 p2 p3 p4
> Attached scsi disk sda at scsi3, channel 0, id 0, lun 0
>
> dmesg after some time:
>
> usb 2-1: grep timed out on ep0in
> (5 more lines)
> usb 2-1: cat timed out on ep0in
> (3 more lines)
>
> also:
> usb 2-1: khubd timed out on ep0in
> usb 2-1: device descriptor read/64, error -110
>
> ---------------------------------------------------
> modules of interest:
> lsmod(without snd modules, etc.):
>
> sd_mod                 16400  0
> ohci1394               38404  0
> usb_storage            36512  0
> ohci_hcd               24648  0
> sbp2                   26064  0
> scsi_mod              101308  3 sd_mod,usb_storage,sbp2
> ieee1394              115688  2 ohci1394,sbp2
> evdev                   9984  0
> udf                    94020  0
> binfmt_misc            11656  0
> nfs                   239608  0
> lockd                  70328  1 nfs
> sunrpc                157448  2 nfs,lockd
> ipip                   12072  0
> xfrm4_tunnel            4964  1 ipip
> usbhid                 41536  0
> usbcore               131024  4 usb_storage,ohci_hcd,usbhid
> sungem                 35780  0
> sungem_phy              9568  1 sungem
I know for a fact that there is a problem with partitioned USB disks and 
a certain kernel configuration. I had a simillar problem with my iPod.

Long story made short: I used the ubuntu config as a starting point to 
make my own kernel that can mount partitions.

More info is on www.linuxquestions.org at the end of a thread called 
"ipod mini - usb on a SuSE system". Google for : "recompile the kernel 
and make sure u do this" to find the thread ( I haven't checked if 
Google returns results, but the forum supports searching ). The last 3 
posts explain how to make the stuff work. If you need a config i will 
send you mine.

--
Regards,
EddyP
===========================
I had a favourite quote, but I forgot it. And it was insightful.