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docs: Add documentation of disk size limitations

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Document the artificially imposed 1 EiB disk size limit and size limitations
with LUKS volumes.

Fix a few punctuation issues.

Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Glenn Washburn 2020-12-15 18:47:34 -06:00 committed by Daniel Kiper
parent ec46685ed4
commit 635ef55ed1
1 changed files with 12 additions and 3 deletions
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15
docs/grub.texi
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@ -5964,6 +5964,15 @@ GRUB2 is designed to be portable and is actually ported across platforms. We
try to keep all platforms at the level. Unfortunately some platforms are better try to keep all platforms at the level. Unfortunately some platforms are better
supported than others. This is detailed in current and 2 following sections. supported than others. This is detailed in current and 2 following sections.
All platforms have an artificially GRUB imposed disk size restriction of 1 EiB.
In some cases, larger disk sizes can be used, but access will not be allowed
beyond 1 EiB.
LUKS2 devices with size larger than 16 EiB are currently not supported. They
can not be created as crypto devices by cryptomount, so can not even be
partially read from. LUKS have no limitations other than those imposed by the
format.
ARC platform is unable to change datetime (firmware doesn't seem to provide a ARC platform is unable to change datetime (firmware doesn't seem to provide a
function for it). function for it).
EMU has similar limitation. EMU has similar limitation.
@ -5982,8 +5991,8 @@ by national encoding compatible only in pseudographics.
Unicode is the most versatile charset which supports many languages. However Unicode is the most versatile charset which supports many languages. However
the actual console may be much more limited depending on firmware the actual console may be much more limited depending on firmware
On BIOS network is supported only if the image is loaded through network. On BIOS, network is supported only if the image is loaded through network.
On sparc64 GRUB is unable to determine which server it was booted from. On sparc64, GRUB is unable to determine which server it was booted from.
Direct ATA/AHCI support allows to circumvent various firmware limitations but Direct ATA/AHCI support allows to circumvent various firmware limitations but
isn't needed for normal operation except on baremetal ports. isn't needed for normal operation except on baremetal ports.
@ -6012,7 +6021,7 @@ Bootlocation is ability of GRUB to automatically detect where it boots from.
``disk'' means the detection is limited to detecting the disk with partition ``disk'' means the detection is limited to detecting the disk with partition
being discovered on install time. ``partition'' means that disk and partiton being discovered on install time. ``partition'' means that disk and partiton
can be automatically discovered. ``file'' means that boot image file name as can be automatically discovered. ``file'' means that boot image file name as
well as disk and partition can be discovered. For consistency default install ignores well as disk and partition can be discovered. For consistency, default install ignores
partition and relies solely on disk detection. If no bootlocation discovery is available partition and relies solely on disk detection. If no bootlocation discovery is available
or boot and grub-root disks are different, UUID is used instead. On ARC if no device or boot and grub-root disks are different, UUID is used instead. On ARC if no device
to install to is specified, UUID is used instead as well. to install to is specified, UUID is used instead as well.