Re: [PATCH 1/2] disk: read up to 63 sectors in LBA mode

[ValdikSS via Grub-devel]

On 05.10.2023 22:10, Glenn Washburn wrote:

--- a/include/grub/disk.h
+++ b/include/grub/disk.h
@@ -190,6 +190,9 @@ typedef struct grub_disk_memberlist *grub_disk_memberlist_t;

+#define GRUB_DISK_MAX_LBA_SECTORS 63

#define GRUB_DISK_MAX_MAX_AGGLOMERATE ((1 << (30 - GRUB_DISK_CACHE_BITS - GRUB_DISK_SECTOR_BITS)) - 1) +/* Maximum number of sectors to read in LBA mode at once */

Why is this set to 63 if we're not obeying CHS restrictions any way?

The current overall reading limit in GRUB is up to 63 sectors. This patch just removes CHS layout restrictions for LBA reads, and the later patch increases overall limit value to 127.

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