Subject: Re: what have changed in st driver?
To: Wojciech Puchar <firstname.lastname@example.org>
From: Paul Ripke <email@example.com>
Date: 12/28/2003 11:34:08
On Sunday, Dec 28, 2003, at 07:11 Australia/Sydney, Wojciech Puchar
> i've been able to use 32K blocks on exactly that tape drive in 1.5.*
> root@serwer# tar -b64 -cvf /dev/rst0 /bin /sbin
> tar: Write block size of 32768 too large, maximum is: 32256
I think you'll find this is due to the switch to tar-is-pax. From the
When writing an archive, block the output at a positive
integer number of bytes per write to the archive file. The
blocksize must be a multiple of 512 bytes with a maximum of
bytes. A blocksize can end...
However, from the tar(1) manpage:
-b blocking factor, --block-size blocking factor
Set blocking factor to use for the archive. tar
byte blocks. The default is 20, the maximum is 126.
chives with a blocking factor larger 63 violate the
standard and will not be portable to all systems.
Looks like the later needs updating. BTW, this is current as of around
2003-12-08, haven't looked for more recent changes.
If you want larger, non-POSIX blocking factors, you can always install
another tar variant from pkgsrc.
> the drive is:
> st0 at scsibus0 target 6 lun 0: <ARCHIVE, IBM4326NP/RP !D, 04BK> tape
> st0: drive empty
> st0: sync (200.00ns offset 15), 8-bit (5.000MB/s) transfers
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