Re: kern/48787

["Thomas Schmitt" <scdbackup%gmx.net@localhost>]

The following reply was made to PR kern/48787; it has been noted by GNATS.

From: "Thomas Schmitt" <scdbackup%gmx.net@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/48787
Date: Tue, 06 May 2014 19:29:36 +0200

 In case you want to convert the unpacked large.iso into a
 sparse file with holes:
 
 The data file extents are located between 2048-blocks
 56 and 2114008.
 
   Report layout: xt , Startlba ,   Blocks , Filesize , ISO image path
   File data lba:  0 ,       56 ,  2097151 , 4329375744 , '/my/large_file'
   File data lba:  1 ,  2097207 ,    16802 , 4329375744 , '/my/large_file'
 
 I did on my virtual NetBSD:
 
   dd if=/dev/cd0a bs=2048 count=56 of=/dvdbuffer/large.iso
   dd conv=notrunc if=/dev/cd0a bs=2048 skip=2114008 seek=2114008 \
      of=/dvdbuffer/large.iso
 
 du increased by 864 blocks, file size and MD5 match the
 original inflated ISO on the hosting system.
 That's a cheap test object for a 4 GiB problem, i'd say.