Date: Wed, 7 Feb 1996 15:05:52 -0800 (PST) From: Stefan Esser <se> To: koeck@pluto.mpi-hd.mpg.de, se, freebsd-bugs Subject: Re: kern/527 Message-ID: <199602072305.PAA05407@freefall.freebsd.org>
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Synopsis: dump causes assertion in ncr.c State-Changed-From-To: open-analyzed State-Changed-By: se State-Changed-When: Wed Feb 7 14:58:00 PST 1996 State-Changed-Why: This appears to be caused by the generic SCSI code sending a START STOP UNIT command at each open of the raw disk device. Two programs are known to possibly open such a device multiple times within a fraction of a second: DUMP and FSCK. The NCR driver sends these commands with ORDERED TAG messages, which appears to confuse some IBM drives, if several are issued concurrently. This should be changed in the generic SCSI code, which easily could count the number of times a device has been opened and which should start the drive only once.
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