Re: Fwd: Re: portable usb drive problem

By now this is moot, but nevertheless...

On Sat, 7 Jul 2007, Gene Heskett wrote:

> Humm.  I thought I'd be smart and plugged the extra pigtail of the cable in 
> first (power the power), but that first reset the box, then powered it down!  
> But left the hd access led on for about 20 seconds?
> 
> So I'm rebooted for the 2nd time, which BTW took 2, 5 second presses of the 
> power switch to get it to power up again.  The first one just completed the 
> power off cycle I guess.
> 
> Anyway, here goes plugging in the regular cable.
> By the time I do that, and get back to the keyboard,(I have to crawl under the 
> next desk to plug it into a root port & its too crowded for these old bones) 
> the dmesg ring buffer has overflowed with several dozens of this verse:
> 
> usb-storage: *** thread awakened.
> usb-storage: Command TEST_UNIT_READY (6 bytes)
> usb-storage:  00 00 00 00 00 00
> usb-storage: Bulk Command S 0x43425355 T 0xbb L 0 F 0 Trg 0 LUN 3 CL 6
> usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
> usb-storage: Status code 0; transferred 31/31
> usb-storage: -- transfer complete
> usb-storage: Bulk command transfer result=0
> usb-storage: Attempting to get CSW...
> usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
> usb-storage: Status code 0; transferred 13/13
> usb-storage: -- transfer complete
> usb-storage: Bulk status result = 0
> usb-storage: Bulk Status S 0x53425355 T 0xbb R 0 Stat 0x1
> usb-storage: -- transport indicates command failure
> usb-storage: Issuing auto-REQUEST_SENSE
> usb-storage: Bulk Command S 0x43425355 T 0xbc L 18 F 128 Trg 0 LUN 3 CL 6
> usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
> usb-storage: Status code 0; transferred 31/31
> usb-storage: -- transfer complete
> usb-storage: Bulk command transfer result=0
> usb-storage: usb_stor_bulk_transfer_buf: xfer 18 bytes
> usb-storage: Status code 0; transferred 18/18
> usb-storage: -- transfer complete
> usb-storage: Bulk data transfer result 0x0
> usb-storage: Attempting to get CSW...
> usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
> usb-storage: Status code 0; transferred 13/13
> usb-storage: -- transfer complete
> usb-storage: Bulk status result = 0
> usb-storage: Bulk Status S 0x53425355 T 0xbc R 0 Stat 0x0
> usb-storage: -- Result from auto-sense is 0
> usb-storage: -- code: 0x70, key: 0x2, ASC: 0x3a, ASCQ: 0x0
> usb-storage: (Unknown Key): (unknown ASC/ASCQ)
> usb-storage: scsi cmd done, result=0x2
> usb-storage: *** thread sleeping.

FYI, this error code means "Not ready; medium not present".  It refers 
to the fact that you don't have a card inserted in the card reader.

> According to:
> dmesg|grep 'usb-storage: -- code:'|wc -l there are 73 of them and its not 
> incrementing the count, so I'd assume its either actually quit, or that's the 
> size limit of the ring buffer.  According to htop, usb-storage is 
> occasionally waking up, running itself up near the top of the list but not 
> showing any actual cpu usage (0.0) at say 300 second intervals.

The HAL daemon does this.  It polls devices with removable media (like 
card readers) 4 times per second to see if you have inserted anything.

> And the drive has not spun up.  It is plugged into a root port.  And that is 
> the best I can do unless someone knows howto do a running capture of the 
> dmesg ring buffer so that I can show what actually occurs at the instant of 
> the plugin.  ISTR its set for 128k in the build.  That could be expanded as I 
> have a gig of ram, so even 10 megs could be done I'd think unless there is a 
> pointer size limit to the ring buffer.

You could turn off HAL.  But it looks like you don't need to...

Alan Stern


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