Kai,
Thanks for response.
I don't care about portability.
Does Linux provide any proprietary way to utilize that 'early
notification' End-Of-Tape SCSI feature?
I really, really need it. Any suggestion on what could be
modified to achieve it?
Thanks,
Ilya Dorfman
Procom Technology, Inc
(949) 794-4620
[EMAIL PROTECTED]
-----Original Message-----
From: Kai Makisara <[EMAIL PROTECTED]>
To: linux-scsi <[EMAIL PROTECTED]>
Date: Sunday, April 25, 1999 2:24 AM
Subject: Re: End of tape
>On Thu, 22 Apr 1999, Ilya Dorfman wrote:
>
>> Hi,
>> I have a SCSI tape.
>> Is there a way to find out that I'm about to reach the end of the tape?
>> When write() returns the value that is less than the buffer size that
>> means that EOT is reached and nothing more could be written.
>> Is there any 'early notification' about EOT?
>>
>The SCSI devices would allow early notification but the problem is the
>Unix tape semantics: there is no common way to tell that we are at
>the early-warning point. The Unix driver returns zero to indicate the end
>of tape and nothing else is available for portable programs. Solaris
>allows writes past this point in the following way: the first write after
>EOT indication writes whatever can be written, the next returns zero, the
>next writes, etc. This "feature" is not supported by other Unices and I
>would not recommend utilizing in programs.
>
> Kai
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