[Chugalug] force usb enumeration?

Matt Keys mk6032 at yahoo.com
Tue Oct 2 01:11:04 UTC 2012


I'm not sure wtf is going on with it. I just repartitioned it and
reformatted as ext3 thinking it may just be ntfs screwing with it. That
cleared up the weird uuid, so I put that in fstab and tried again. Ubuntu
still prompts me at boot to "Press S to skip" for the missing disk at boot.
The system goes to sleep after there's no activity. As soon as I replug it,
it was mounted on /usbhd : 

[   85.398048] usb 4-1: device descriptor read/8, error -110
[   85.500145] hub 4-0:1.0: unable to enumerate USB device on port 1
[  121.084055] usb 1-5: new high-speed USB device number 8 using ehci_hcd
[  121.272111] Initializing USB Mass Storage driver...
[  121.272497] scsi4 : usb-storage 1-5:1.0
[  121.272740] usbcore: registered new interface driver usb-storage
[  121.272745] USB Mass Storage support registered.
[  121.303605] usbcore: registered new interface driver uas
[  122.273758] scsi 4:0:0:0: Direct-Access     Seagate  Backup+ Desk
D801 PQ: 0 ANSI: 5
[  122.275026] sd 4:0:0:0: Attached scsi generic sg4 type 0
[  122.279393] sd 4:0:0:0: [sdc] 1953525167 512-byte logical blocks: (1.00
TB/931 GiB)
[  122.280427] sd 4:0:0:0: [sdc] Write Protect is off
[  122.280436] sd 4:0:0:0: [sdc] Mode Sense: 4f 00 00 00
[  122.281679] sd 4:0:0:0: [sdc] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[  122.300573]  sdc: sdc1
[  122.303675] sd 4:0:0:0: [sdc] Attached SCSI disk
[  122.907928] kjournald starting.  Commit interval 5 seconds
[  122.909831] EXT3-fs (sdc1): using internal journal
[  122.909850] EXT3-fs (sdc1): mounted filesystem with ordered data mode


-----Original Message-----
From: chugalug-bounces at chugalug.org [mailto:chugalug-bounces at chugalug.org]
On Behalf Of Dave Brockman
Sent: Monday, October 01, 2012 8:29 PM
To: Chattanooga Unix Gnu Android Linux Users Group
Subject: Re: [Chugalug] force usb enumeration?

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On 10/1/2012 8:10 PM, Matt Keys wrote:
> I have a problem enumerating a usb drive at boot. At the moment, I can 
> only get ubuntu "see" it by unplugging and replugging the drive after 
> the system is fully up. :

> Does anybody know of a way to force a usb bus rescan? I'm thinking 
> maybe something in rc.local or with udev?

Is it possible the drive is going to sleep?  Does the drive power via USB?
If not, does power off/on accomplish the same thing?

Regards,

dtb

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