[CentOS] CentOS-7-x86_64-dvd-2009.iso is too big for DVD blanks

Tue Mar 16 13:51:16 UTC 2021
Lamar Owen <lowen at pari.edu>

On 3/16/21 9:37 AM, Lamar Owen wrote:
> Sure, no problem.  I had a similar problem with a different version of 
> CentOS, 8.3, which is too large to fit on a dual-layer DVD.
I should have done the math before posting, sorry.  Here's the math:
lowen at d10-lo-m6700:~$ dvd+rw-mediainfo /dev/sr0
INQUIRY:                [MATSHITA][BD-MLT UJ272    ][1.00]
GET [CURRENT] CONFIGURATION:
  Mounted Media:         2Bh, DVD+R Double Layer
...
READ TRACK INFORMATION[#1]:
...
Free Blocks:           4173824*2KB
  Track Size:            4173824*2KB
...

That's 8547991552 bytes.

Ok:
lowen at d10-lo-m6700:~$ ls -l CentOS*8.3*.iso
-rw-r--r-- 1 lowen lowen 9264168960 Mar 16 09:27 
CentOS-8.3.2011-x86_64-dvd1.iso
lowen at d10-lo-m6700:~$

That's 716177408 bytes too large.