URL:
<http://savannah.gnu.org/bugs/?34840>
Summary: grub 1.99 fails to detect FAT filesystem on EFI
Partition
Project: GNU GRUB
Submitted by: mildred
Submitted on: Wed 16 Nov 2011 01:32:05 PM GMT
Category: Filesystem
Severity: Major
Priority: 5 - Normal
Item Group: Software Error
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release:
Release: other
Reproducibility: None
Planned Release: None
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Details:
I have a system which has an EFI partition, formatted as FAT. But GRUB doesn't
recognize it is a FAT filesystem. Consequently, GRUB don't find its
configuration file and defaults to the command line.
I set debug=all and all I could find that was of interest was:
grub> ls (hd1,gpt1)
...
kern/disk.c:245: Opening `hd1,gpt1'
disk/efi/efidisk.c:508: opening hd1
disk/efi/efidisk.c:538: m = 0x7de9c448, last block = df94daf, block size =
200
disk/efi/efidisk.c:543: opening hd1 succeeded
disk/efi/efidisk.c:571: reading 0x8 sectors at the sector 0x0 from hd1
partmap/gpt.c:86: Read a valid GPT header
partmap/gpt.c:110: GPT entry 0: start=40, length=409600
kern/fs.c:54: Detecting ext2...
disk/efi/efidisk.c:571: reading 0x8 sectors at the sector 0x28 from hd1
kern/fs.c:60: ext2 detection failed.
kern/fs.c:54: Detecting fat...
kern/fs.c:60: fat detection failed.
kern/disk.c:330: Closing `hd1'.
disk/efi/efidisk.c:552: closing hd1
error: unknown filesystem
...
(hd0) is the USB key, and (hd0,msdos1) is FAT, and GRUB detect it correctly.
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