Re: sg_io_hrd_t - host_status error (0x05)

[Douglas Gilbert <dougg@torque.net>]

Liong Hoong wrote:
> Hi all,
> 
> I have set up the main control structure for the
> version 3 SCSI generic driver. I am trying to send
> down some opcodes (vendor specific) to a usb mass
> storage device. Found that I encountered host_status
> error, SG_ERR_DID_ABORT whenever I send opcodes from
> 0x80 to 0x9f, but encountered no errors with other
> opcodes. 
> 
> The errors occured even without the device plugged in,
> which seem the sg driver has exclusively blocked the
> opcodes from 0x80 to 0x9f. Is it true?? Is there any
> work around for this??
> 
> Is it because of Group 4 (0x80 to 0x9f) need 16 bytes
> of cdb length? But even I prepare the cdb of 16 bytes,
> it also failed. 
> 
> I am using red hat 8.0, 2.4.18. 

The scsi subsystem mid level allowed 16 byte cdbs through
from and including lk 2.4.15 . The sg driver allows them
through. That leaves the usb-storage driver (and drivers
further down the USB stack) and the device itself as the
cause of your problem.

Doug Gilbert