Re: Why is the DVD image so large?

Den 2025-11-03 kl. 19:42, skrev Sulev-Madis Silber:
>
> On November 3, 2025 7:32:59 PM GMT+02:00, Tomek CEDRO <tomek@cedro.info> wrote:
>> On Mon, Nov 3, 2025 at 6:06 PM Sulev-Madis Silber
>> <freebsd-current-freebsd-org111@ketas.si.pri.ee> wrote:
>>> (..)
>>> the optical disks are most of cases readonly, they could retain data well, could be pressed into permanent disk, would be allowed in high security environments where usb would be not maybe
>>>
>>> i miss the optical use cases here, anyone give me insight?
>> 1. read only / immutable.
>> 2. no moving parts = immune to mechanical malfunction like hdd.
>> 3. no electronics parts = immune to esd / emp like ssd.
>> 4. long life time far exceeding hdd/ssd (i.e. hard coat, or mdisk).
>> 5. small and light.
>>
> in installer context or all storage? i do hdd/flash here and i have written some cd-r's. one rw. of course all are pretty much correct, or fully, depending
>
> anyway it was about installer. i don't know if somebody wants to burn like bd-r for install
>
> so how many isos is practical?
>
> and i wonder if larger usb stick owners could take dvd dl or some blu
>
> or we still need separate usbs? with usb there is no standard size. with 64g, avg size, you could iirc fit a quite a de's there and their deps
>
> i wonder if image maker is solution. has own issues. how to verify it
>
> whatever

    The  cost  for  BD  Media and BD drives are  not  noticably  higher than cost for DVD-DL  media  and  drives.
    The  risk  that a User needs to re-invest  in  a  New  BLuray writer  drive is significant,  while  the  risk  that
    your  present  drive  cant  write  DVD-DL  format is exeedingly small as it needs to be older than 15 years for that to occur.

    I did not try writing BD media on Freebsd. I can test it if needed.  I have never  used UDF format AFAIR.

     To  stipulate  use  of  DVD-DL  media to get rid of  the  4.7 GB  limitation is presently very low risk and has no economic
     impact for the end user. ( I have used DVD-DL for  15-ALPHA & 15-BETA  isos.)   Joerg Shilly's  CDrecord / K3B  can write  DVD-DL.
     To  stipulate BluRay BD  media has possible  hardware replacment issues  and UDF  format  risks.

         Regards

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-------------------------
Lars Tunkrans
Oracle SPARC/Solaris System Administrator
Fujitsu M12 SPARC Specilaist