Date: Wed, 28 Apr 1999 16:52:10 +0100 From: amobbs@allstor-sw.co.uk To: freebsd-scsi@FreeBSD.ORG Subject: Re: QIC tape problems on -stable (was: hanging `tar xfvR /dev /nrst0' process, can i debug it?) Message-ID: <80256761.00572CBF.00@mail.plasmon.co.uk>
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> >These are *amazingly* broken drives then. The SCSI specification says that >a write of *zero* filemarks is to flush any pending writes. You have to do >this when you do a read hardware position in order to avoid an ambiguity >in the spec as to the true position as affected by data in the tape drive >buffer. Doesn't Read Position (34h) give all the info you need, i.e. Physical pos., logical pos. and number of blocks in buffer? I agree that flushing is safer, but surely one could avoid it if necessary. Andrew. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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