dd error?

[Clarence Dold]

>From article <6 at holston.UUCP>, by barton at holston.UUCP (barton):
> When attempting to pipe tar output to dd for a
> larger blocking factor with the line:
> tar cf - . | dd obs=512k > /dev/rct0
> I get an error from dd saying: arguement 512k out of range.
Two possibilities:
1) You're maximum process size precludes allocating a buffer of that 
	size.  ( You can probably find the max proc size at boot time )
2) The DMA hardware for the tape drive can't handle a transfer of that
	size.  Some DMA controllers have a transfer count register of
	16 bits, good for 64k worth of transfers, which might correspond
	to 128k bytes to tape, and 33MB to disk.

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Clarence A Dold - cdold at starfish.Convergent.COM         (408) 434-2083
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