Re: Fwd: Re: portable usb drive problem

Gene, I do wish you'd snip out all that introductory stuff with 4 '>'
signs in front; everyone has already read it multiple times.  Here,
I'll do it for you...

On Thu, 5 Jul 2007, Gene Heskett wrote:

> Thanks Steve.  I crawled under the desk and found a root port that was empty, 
> one right on the back panel of the mobo.  From messages:
> 
> Jul  5 21:32:01 coyote kernel: usb 3-3.4.2: USB disconnect, address 12
> Jul  5 21:32:14 coyote kernel: usb 3-3.4.2: new high speed USB device using 
> ehci_hcd and address 13
> Jul  5 21:32:14 coyote kernel: usb 3-3.4.2: Product: USB Storage
> Jul  5 21:32:14 coyote kernel: usb 3-3.4.2: SerialNumber: 000000009317
> Jul  5 21:32:14 coyote kernel: usb 3-3.4.2: configuration #1 chosen from 1 
> choice
> Jul  5 21:32:14 coyote kernel: scsi3 : SCSI emulation for USB Mass Storage 
> devices
> Jul  5 21:32:19 coyote kernel: scsi 3:0:0:0: Direct-Access     Generic  
> STORAGE DEVICE   9317 PQ: 0 ANSI: 0
> Jul  5 21:32:19 coyote kernel: scsi 3:0:0:1: Direct-Access     Generic  
> STORAGE DEVICE   9317 PQ: 0 ANSI: 0
> Jul  5 21:32:19 coyote kernel: scsi 3:0:0:2: Direct-Access     Generic  
> STORAGE DEVICE   9317 PQ: 0 ANSI: 0
> Jul  5 21:32:19 coyote kernel: scsi 3:0:0:3: Direct-Access     Generic  
> STORAGE DEVICE   9317 PQ: 0 ANSI: 0
> Jul  5 21:32:19 coyote kernel: sd 3:0:0:0: [sda] Attached SCSI removable disk
> Jul  5 21:32:19 coyote kernel: sd 3:0:0:0: Attached scsi generic sg0 type 0
> Jul  5 21:32:19 coyote kernel: sd 3:0:0:1: [sdb] Attached SCSI removable disk
> Jul  5 21:32:19 coyote kernel: sd 3:0:0:1: Attached scsi generic sg1 type 0
> Jul  5 21:32:19 coyote kernel: sd 3:0:0:2: [sdc] Attached SCSI removable disk
> Jul  5 21:32:19 coyote kernel: sd 3:0:0:2: Attached scsi generic sg2 type 0
> Jul  5 21:32:19 coyote kernel: sd 3:0:0:3: [sdd] Attached SCSI removable disk
> Jul  5 21:32:19 coyote kernel: sd 3:0:0:3: Attached scsi generic sg3 type 0
> Jul  5 21:43:44 coyote kernel: usb 3-2: new high speed USB device using 
> ehci_hcd and address 14
> Jul  5 21:43:44 coyote kernel: usb 3-2: Product: Maxtor OneTouch III
> Jul  5 21:43:44 coyote kernel: usb 3-2: Manufacturer: Maxtor
> Jul  5 21:43:44 coyote kernel: usb 3-2: SerialNumber: RA01ZFQC
> Jul  5 21:43:44 coyote kernel: usb 3-2: configuration #1 chosen from 1 choice
> Jul  5 21:43:44 coyote kernel: scsi4 : SCSI emulation for USB Mass Storage 
> devices
> Jul  5 21:43:54 coyote kernel: usb 3-2: reset high speed USB device using 
> ehci_hcd and address 14
> Jul  5 21:43:59 coyote kernel: usb 3-2: device descriptor read/64, error -71
> Jul  5 21:44:10 coyote kernel: usb 3-2: reset high speed USB device using 
> ehci_hcd and address 14
> Jul  5 21:44:36 coyote last message repeated 3 times
> Jul  5 21:44:37 coyote kernel: scsi 4:0:0:0: scsi: Device offlined - not ready 
> after error recovery
> 
> So its still fubar for some reason.  Firing up the lappy, its fine.

This is where it would help to see the debugging information.

> On this box, an lsmod shows this:
> usb_storage            50368  0
> scsi_mod               77448  3 sg,sd_mod,usb_storage
> 
> All as a group.

The grouping means less than you think.  In this case, all it indicates 
is that scsi_mod is being used by sg, sd_mod, and usb_storage.  Hence 
you can't rmmod scsi_mod without first rmmod'ing those other three 
modules.

The fact that usb_storage is on the line above scsi_mod means only that 
no other modules were loaded in between.

> But on the lappy where it works, clear at the top of the lsmod output is
> 
> usb_storage            66049  0
> And down in the lower portion of that list is:
> scsi_mod              137549  5 usb_storage, sr_mod, sg, libata, sd_mod
> 
> So there's a bunch of stuff on the FC5 box that's missing on the FC6 box.  
> Starting with libata and sr_mod.  Go look at my .config again I guess.

Libata is important for SATA.  It may be built into your FC6 kernel 
instead being a separate module.  sr_mod is the SCSI CD/DVD driver; you 
don't need it if you're not using a CD or DVD drive.

> Also the lsusb -v for that device shows a MaxPower of 100ma, exactly the same 
> as it says on the big box.  Maybe I'll find something in the .config...

Don't always believe what the device descriptors say.  They often lie.

Alan Stern


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