Conference ssdevo::hsj40_product

1217.0. "unexpected bus phase" by SCASS1::BUENSUCESO () Sat Mar 08 1997 14:15

    	An application was shutdown at my customer's site - what looked
    like the cause was related to an entry in the errorlog. A drive
    encounterred an error " unexpected bus phase " during a write
    operation. 
    	This appears to be a SCSI phase error on one of the shelves off the
    HSJ40. Normally, phase errors on SCSI busses that are closer to the
    operating system are delt with by the driver; that is, I've seen the
    phase error followed by a sequence of events to include a SCSI reset.
    	My question is - is the HSJ40 smart enough to reconsile a phase
    error and in this case successfully complete the write?
    
    regards,
    Ernie Buensuceso
    MCS Dallas, Tx
    	

    
    From the drive side of the world,,,
    
    I would think not. Unexpected phase errors usually end up in a bus
    reset then retry of the entire transaction from the point of last good
    status command. You cannot just "restart" a phase.
    
    roger.
    

Re .-1

This is an HSJ so the controller will reset the bus and complete the transfer
without the host knowing what has happened unless... The drive has died
completely.

Same answer different semantics. My point to .0 is that you do not just drop out
of phase and then just restart "that" phase. You have to back up to the end of
last sucessful transfer and restart.

roger.

    thanks folks...