Subject: Serious problem with pax-as-tar: can't restore old big-record backups.
To: None <email@example.com>
From: Thor Lancelot Simon <firstname.lastname@example.org>
Date: 05/24/2003 15:59:35
With GNU tar as the system "tar" , I did backups with "-b 128", which
resulted in a 64K record size on tape. Our new pax-as-tar accepts
-b 128 on the command line but will never use a buffer larger than 32256
bytes, which results in the kernel being unable to deliver full tape
records to tar, which results in a stream of error messages from at
least some host adapter drivers ("65536-byte tape record too large for
32256-byte user buffer") and unreadable backups.
I understand that ANSI tar allows a maximum blocksize of 32256 -- I
don't understand *why*, but I do understand that that's the standard.
However, it's a serious regression in functionality to not support
larger blocksizes on _read_, leaving people unable to restore old
Thor Lancelot Simon email@example.com
But as he knew no bad language, he had called him all the names of common
objects that he could think of, and had screamed: "You lamp! You towel! You
plate!" and so on. --Sigmund Freud