Re: [TUHS] v7 tar and 2bsd.tar

[Will Senn <will.senn@gmail.com>]

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On 7/27/20 10:47 PM, Will Senn wrote:
> On 7/27/20 10:21 PM, Clem Cole wrote:
>> try 1b for the blocking.
> Hmm:
> dd if=/dev/rrk0 of=ucbtar bs=1b
> no space on dev 6/0
> write: No space left on device
> 1175+0 records in
> 1175+0 records out
>
> ls -l
> -rw-rw-r-- 1 root   601088 Dec 31 19:41 ucbtar
>
> df
> bad free count, b=1
> /dev/rp0 0
>
> yeah, well no kidding, that file is WAY bigger than the file on the 
> host. so...
>
> rm ucbtar  (or bad things WILL happen with no space left)
>
> set bs explicitly on the mac side of things
> dd if=tar of=ucbtar bs=512 conv=sync
> 27+1 records in
> 28+0 records out
>
> ls -l
> -rwxr-x---  1 wsenn  staff      14156 Jul 27 22:32 tar
> -rw-r--r--  1 wsenn  staff      14336 Jul 27 22:44 ucbtar
>
> so back in v7:
>
> set bs explicity  and # blocks to read (otherwise it reads past the 
> size of the file, simh quirk?)
> dd if=/dev/rrk0 of=ucbtar bs=512 count=28
> 28+0 records in
> 28+0 records out
>
> # chmod 0755 ucbtar
> # ls -l
> total 28
> -rwxr-xr-x 1 root    14336 Dec 31 19:47 ucbtar
>
> # ./ucbtar x
> tar: bin/ - cannot create
> directory checksum error
> echo $?
> 2
>
> Haha, I'm learning, but I wanna cry :).
>
>
And the other copy of tar:
ucbtar x
Tar: blocksize = 20
tar: bin/ - cannot create
directory checksum error
# echo $?
2

Ah well, I'll pick it back up tomorrow. I remember doing this on v6. I'm 
gonna see if I can dig up some old notes. Maybe I unpacked the tar on 
the host and used simtools to repack as magtape... just seems like this 
oughta work.



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