SUMMARY: Problems using dd with a QIC-150

From: Mauricio Fernandez (
Date: Fri Sep 03 1993 - 21:10:46 CDT

The original question:

> Hello, I'm using dd with a QIC-150 tape drive. No matters what block
> size I specify the answer is always the same.
> In the tty where dd is executed:
> dd: write: Invalid argument
> In the console
> st0: write: not modulo 512 block size.
> Default block size was also tried.
> I'll appreciatte any comments. I'll summarize. Thanks.

The answer/solution:

I've missed a conv=sync which pads the last block to the full block size.
This isn't done by default.

Thanks to:

Richard J. Niziak (Mark Cain) (Mark S. Anderson)
Casper Dik <>
Jim Murff (
Russ Poffenberger DOMAIN:
E. John Benjamins <>
Steve Harris etnibsd!
Rigert Thomas
Syed Zaeem Hosain

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