[USB] JetFlash TS1GJF2B 2.00 Attempt to query devicesizefailed: UNIT ATTENTION [WORK AROUND

[Wilkinson, Alex]

    0n Tue, Jan 11, 2005 at 12:09:25PM +1030, Wilkinson, Alex wrote: 

    >    0n Tue, Jan 11, 2005 at 10:39:56AM +1030, Wilkinson, Alex wrote: 
    >
    >    >    >>    (da0:umass-sim0:0:0:0): Retrying Command (per Sense Data)
    >    >    >>    (da0:umass-sim0:0:0:0): READ CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0 
    >    >    >>    (da0:umass-sim0:0:0:0): CAM Status: SCSI Status Error
    >    >    >>    (da0:umass-sim0:0:0:0): SCSI Status: Check Condition
    >    >    >>    (da0:umass-sim0:0:0:0): UNIT ATTENTION asc:28,0
    >    >    >>    (da0:umass-sim0:0:0:0): Not ready to ready change, medium may have 
    >    >    >>    changed
    >    >    >>    (da0:umass-sim0:0:0:0): Retrying Command (per Sense Data)
    >
    >Okay, I'm trying to make sense of the aforementioned debug output.
    >
    >1. (da0:umass-sim0:0:0:0): READ CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0
    >   (da0:umass-sim0:0:0:0): CAM Status: SCSI Status Error
    >
    >   I'm suspecting that this means that the READ CAPACITY command
    >   failed, therefore we are unable to determine the device's 
    >   physical parameters.
    >
    >2. (da0:umass-sim0:0:0:0): SCSI Status: Check Condition
    >
    >   Looks like we are waiting to for the device to become ready to be
    >   accessed.
    >
    >3. (da0:umass-sim0:0:0:0): UNIT ATTENTION asc:28,0
    >   (da0:umass-sim0:0:0:0): Not ready to ready change, medium may have changed
    >
    >   This 'Additional Sense Code' seems to be where it fails. Looking at
    >   the RBC specs we should see an ASC/ASCQ of 'NEW MEDIA READY FOR
    >   ACCESS'. However, we don't.
    >
    >This is as far as I can go without having my hand held. I would dearly
    >like to get this UMASS device working. 
    >
    >Can any USB wizards please suggest quirks etc that could result in a
    >solution.

removing 'device ehci' from my kernel allows this usb thumb drive to work.

       umass0: USB Flash Disk, rev 2.00/2.00, addr 2
       da0 at umass-sim0 bus 0 target 0 lun 0
       da0: <JetFlash TS1GJF2B 2.00> Removable Direct Access SCSI-2 device 
       da0: 1.000MB/s transfers
       da0: 1000MB (2048000 512 byte sectors: 64H 32S/T 1000C)

What sux is that I cannot utilse the speed of USB 2.0 ;(

- aW