On 9 November 2012 00:41, Marcy Cortes <[email protected]> wrote:

> I did NOREADCHECK and the time was identical.
> This is the ICKDSF format you were thinking of, right?
> CPVOL FMT MODE(ESA) UNIT(E886) VOLID(E886VM) NOVFY RANGE(0,10016) NOREADCHECK

Yep. Apparently it's that cheap they did not bother to change the
default option. I just purged the traces and forgot to check whether
they were maybe reading with zero-length and suppress the transfer
over the channel.

>> For the time being, you could format it with ICKDSF and then DDR cylinder 1 
>> from a Linux pack to fool dasdfmt...
>
> Really?  That would work?  Even on different sized minidisks?

Ideally from the same size ;-)  I though folks did mostly pseudo
full-pack anyway. When you borrow the first 2 tracks from a larger
disk, Linux will spit out a series of error messages when the head
hits the wall, but then makes up his mind and "fdasd -a" does just
fine. I have not tried using the tracks from a smaller disk.

You don't really have to "own" those disks, but just keep a copy of
the tracks in a CMS file
  PIPE trackread 300 0 0 2 | > linuxdsk tracks a
And then re-use that same set whenever you need it
  PIPE < linuxdsk tracks | trackwrite 500 EMPTY 0 1
We did those things back then after flashing an empty disk on top of
it (after the 'range' was removed from dasdfmt).

Rob

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