On Saturday 22 January 2011 11:42:39 Matthias Apitz wrote:
> Hello,
> 
> I have the problem with my new laptop Acer Aspire One that an USB disk
> is not attaching most of the time; the disk itself works in 3 other
> laptops without any problem; here is a (normal) bad and one positive
> example from messages:
> 
> 
> Jan 22 09:22:44 tinyCurrent root: Unknown USB device: vendor 0x07ab product
> 0xfc8e bus uhub4 Jan 22 09:22:44 tinyCurrent kernel: ugen4.3: <Freecom> at
> usbus4
> Jan 22 09:22:44 tinyCurrent kernel: umass0: <Bulk Only Interface> on usbus4
> Jan 22 09:22:44 tinyCurrent kernel: umass0:  SCSI over Bulk-Only; quirks =
> 0x0000 Jan 22 09:22:45 tinyCurrent kernel: umass0:0:0:-1: Attached to
> scbus0 Jan 22 09:22:57 tinyCurrent kernel: ugen4.3: <Freecom> at usbus4
> (disconnected) Jan 22 09:22:57 tinyCurrent kernel: umass0: at uhub4, port
> 1, addr 3 (disconnected) Jan 22 09:22:57 tinyCurrent kernel:
> (probe0:umass-sim0:0:0:0): AutoSense failed
> 
> 
> Jan 22 09:23:10 tinyCurrent root: Unknown USB device: vendor 0x07ab product
> 0xfc8e bus uhub4 Jan 22 09:23:10 tinyCurrent kernel: ugen4.3: <Freecom> at
> usbus4
> Jan 22 09:23:10 tinyCurrent kernel: umass0: <Bulk Only Interface> on usbus4
> Jan 22 09:23:10 tinyCurrent kernel: umass0:  SCSI over Bulk-Only; quirks =
> 0x0000 Jan 22 09:23:11 tinyCurrent kernel: umass0:0:0:-1: Attached to
> scbus0 Jan 22 09:23:11 tinyCurrent kernel: da0 at umass-sim0 bus 0 scbus0
> target 0 lun 0 Jan 22 09:23:11 tinyCurrent kernel: da0: <Freecom Hard
> Drive XS 1.00> Fixed Direct Access SCSI-2 device Jan 22 09:23:11
> tinyCurrent kernel: da0: 40.000MB/s transfers
> Jan 22 09:23:11 tinyCurrent kernel: da0: 1430799MB (2930277168 512 byte
> sectors: 255H 63S/T 182401C)
> 
> The kernel is 9-CURRENT r214444 (October 2010). Any ideas?
> 
>       matthias

Is the HDD supplied with external power?

--HPS
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