Re: 2.6.21rc7 autoresume fails on Seagate FreeAgent drives

I was having this very same problem and the fix below worked for me
(but the actual path was
/sys/block/sda/device/scsi_disk:8:0:0:0/allow_restart ). I don't
really know much about the linux device model at all, so I'm not sure
if that's to be expected.

However, if I unplug the drive and plug it in again, the value is set
back to 0 (and the device in the path above would be incremented to 9
so the path would be ... /scsi_disk:9:0:0:0/allow_restart ).

Is there a way to set this more generically for this drive? It seems
like I shouldn't need to do it every time I plug it in.

Thanks,
Scott


> Just the important parts:
>
> > usb-storage: Command READ_10 (10 bytes)
> > usb-storage:  28 00 00 00 02 40 00 00 08 00
>
> > usb-storage: -- unexpectedly short transfer
> > usb-storage: Issuing auto-REQUEST_SENSE
>
> > usb-storage: -- code: 0x70, key: 0x2, ASC: 0x4, ASCQ: 0x2
> > usb-storage: Not Ready: Logical unit not ready, initializing command
> > required
>
> Okay, that's clear.
>
> First of all, this is not a problem with autoresume.  The drive was never
> suspended and it was never resumed.  It's a problem with auto-spin-down.
> As such it has nothing whatsoever to do with USB.
>
> You might be able to fix it by writing an appropriate value to an
> attribute file in sysfs.  In this case you need to do something like:
>
>         echo 1 >/sys/block/sda/device/allow_restart
>
> The path might be slightly different, but you definitely want the file
> named "allow_restart" associated with the drive.  Setting that value will
> enable the system to spin-up the disk when necessary.
>
> If that doesn't work, you might want to try posting to the linux-scsi
> mailing list.
>

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