Re: Problems mounting External USB Drives

[Lawrence Houston <houston greenfield dyndns org>]

John:

On Thu, 18 Jan 2007, John Haxby wrote:

> Lawrence Houston wrote:
> > As a corollary to my previous Posting about Bad Sectors on an Internal 160 
> > GIG SATA Drive, we have been attempting to connect Large External USB 
> > Drives to facilitate a Full System Backup.  The System is a Dell Precision 
> > 370n running RHEL3: when Large External USB Drives (a Maxtor 500 GIG and an 
> > HP 300 GIG) are connected the System Logs display Error Messages which look 
> > as follows (the Drives are NEVER identified by RHEL3 and hence can NOT be 
> > mounted):
> >
> >   hub.c: new USB device 00:1d.7-5, assigned address 3
> >   usb.c: USB device not responding, giving up (error=-71)
> >   hub.c: new USB device 00:1d.7-5, assigned address 4
> >   usb.c: USB device not accepting new address=4 (error=-71)
> You might be better off asking on the linux-usb-users list, but if you 
> believe that the USB disk and enclosure are healthy then it could be 
> something as simple as the USB cable not being less than brilliant.  Have you 
> tried a different one?  Different port?   Different machine?

Yes both the 500 GIG Maxtor and 300 GIG HP work correctly on a second 
Machine running Windows XP, although this is the only RHEL3 Machine 
available...

Swapped the Disk end of the USB Cables between the "working" 100 GIG 
Maxtor and the "non-working" 300 GIG HP and the HP briefly showed as a 
Seagate Drive, but then had problems and shortly there after was set 
Offline!!!

--------------------------------------------------------------------------------
Jan 18 14:59:49 kernel: hub.c: new USB device 00:1d.7-4, assigned address 17
Jan 18 14:59:50 kernel: scsi4 : SCSI emulation for USB Mass Storage devices
Jan 18 14:59:50 kernel:   Vendor: ST330083  Model: 1A                Rev: 4.40
Jan 18 14:59:50 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 02
Jan 18 14:59:50 kernel: Attached scsi disk sdc at scsi4, channel 0, id 0, lun 0
Jan 18 14:59:50 kernel: SCSI device sdc: 586072368 512-byte hdwr sectors (300069 MB)
Jan 18 14:59:58 kernel:  sdc: sdc1 < sdc5 >
Jan 18 14:59:59 kernel: hub.c: new USB device 00:1d.7-8, assigned address 18
   .
   .
   .
Jan 18 15:00:07 kernel: usb_control/bulk_msg: timeout
Jan 18 15:01:17 kernel: hub.c: USB device not accepting new address (error=-71)
Jan 18 15:01:22 kernel: scsi: device set offline - not ready or command retry failed after bus reset: host 4 channel 0 id 0 lun 0
--------------------------------------------------------------------------------

Might this suggest that it is the "poor" USB Support within the 2.4 Kernel 
which Red Hat provides for its RHEL3 Customers which is the source of our 
"problems"???  I would assume things are better with the 2.6 Kernels 
provided for its RHEL4 Customers???  As you can probably tell we are new 
to running External USB Drives under Linux...

Lawrence Houston  --  (houston greenfield dyndns org)