Displaying 3 results from an estimated 3 matches for "fixly".
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2015 Oct 23
3
Isohybrid wiki page and UEFI
> EFI from CD/DVD/BD has a soft size limit of 32 MB for its
> System Partition.
> That's due to the format of El Torito Boot Catalog which
> counts the 512-bytes blocks by a 16-bit unsigned integer.
@Thomas,
If you would be so kind, would you please remind me (us)...
Is this "32MiB" a limitation related to the UEFI specs in any way? Or
is it relevant for BIOS
2015 Oct 23
0
Isohybrid wiki page and UEFI
...can count up to 65535.
Sector count gives the number of "virtual/emulated sectors".
Paragraph 1.5. defines "Virtual Sector" as "200 byte", where
"200" is to be read as hexadecimal number. Decimal 512.
(It also calls CD-ROM sector size "800" which is fixly decimal 2048.)
65535 * 512 bytes = 32 MiB - 512 bytes.
In UEFI 2.4, paragraph 12.3.2.1 "ISO-9660 and El Torito" says:
"IS0-9660 is the industry standard low level format used on CD-ROM
and DVD-ROM. The CD-ROM format is completely described by the
?El Torito? Bootable CD-ROM F...
2015 Oct 23
5
Isohybrid wiki page and UEFI
...5.
> Sector count gives the number of "virtual/emulated sectors".
> Paragraph 1.5. defines "Virtual Sector" as "200 byte", where
> "200" is to be read as hexadecimal number. Decimal 512.
> (It also calls CD-ROM sector size "800" which is fixly decimal 2048.)
>
> 65535 * 512 bytes = 32 MiB - 512 bytes.
>
> In UEFI 2.4, paragraph 12.3.2.1 "ISO-9660 and El Torito" says:
>
> "IS0-9660 is the industry standard low level format used on CD-ROM
> and DVD-ROM. The CD-ROM format is completely described by...