Very Computer

Are you using marks? If so, are you using setmarks or filemarks?

Jamey Kirby

Hi,

As title above,

I'm facing problem integrating storage on tape drive NT and Unix,
my application data is written into the tape from NT 4.0, then it is read by
the the same type of tape drive on Unix OS.

On Unix, we are using the "dd" command to read/write to the tape, and
On NT4.0, we are using the tape driver API.

However, the problem is that the Unix "dd" cannot find the EOF marker
and continue to read through the files until physical tape-end.

What is the EOF code that should be wrote to the tape in order for the Unix
application
recognize it ? or any other step I have missed ?

Thank in advance

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You don't specify the UNIX version, so I will assume it's Linux 2.2.x

dd will stop (because one of its read() will return 0) on a FILE mark.
A file mark will be created automatically, on UNIX, after a write when
closing the device, or when using the MTWEOF ioctl().

: What is the EOF code that should be wrote to the tape in order for the Unix
: application
: recognize it ? or any other step I have missed ?

maybe your MS-* application uses setmarks, or short records, or
whatever.