Hi all,
I run into a grub2 issue.
I have a system with EFI boot enabled and grub2 (grub-2.02-beta2) is stored at
my ssd. At the ssd there is a LVM installed. The EFI firmware is configured to
boot at first from internal ssd and after that try a usb hdd. In the following
cases I got this error message: "error: failure reading sector 0x0 from hd0".
Case 1: SD card reader is plugged into a usb port
Case 2: An USB Multifunction printers is plugged into a usb port
Case 3: I had an usb flash drive installed at boot. If I enter grub2 is unplug
this usb flash drive (not necessary for booting) and select the menu-entry to
boot.
This error is shown 10 seconds and after that the system continues booting
without any issues.
I made some debugging by myself and found that this error comes from
efidisk.c:grub_efidisk_read because grub_efidisk_readwrite returns with
GRUB_EFI_NOT_FOUND (case 3) in case of searching the LVM partitions at
diskfilter.c. I saw there was an improvement that if grub_efidisk_readwrite
returns with GRUB_EFI_NO_MEDIA this error is filtered out (introduced at
grub-2.02-beta3). Would it be possible to add GRUB_EFI_NOT_FOUND at the
filtered out error codes such that this error will not occur any more? This
will prevent the error message if a removeable device was removed.
A patch for this would look like this:
From: Dennis Wassenberg <dennis.wassenb...@secunet.com>
Date: Mon, 9 Jan 2017 13:32:17 +0100
Subject: [PATCH] efidisk: prevent errors from diskfilter scan of removed
removable drives
Map EFI_NOT_FOUND to GRUB_ERR_OUT_OF_RANGE that is ignored by diskfilter.
This affects only internally initiated scans. If read/write from removable is
explicitly requested, we still return an error and text explanation is more
clear for user than generic error.
---
grub-core/disk/efi/efidisk.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/grub-core/disk/efi/efidisk.c b/grub-core/disk/efi/efidisk.c
index 3b79f7b..db93d3a 100644
--- a/grub-core/disk/efi/efidisk.c
+++ b/grub-core/disk/efi/efidisk.c
@@ -583,6 +583,8 @@ grub_efidisk_read (struct grub_disk *disk, grub_disk_addr_t
sector,
if (status == GRUB_EFI_NO_MEDIA)
return grub_error (GRUB_ERR_OUT_OF_RANGE, N_("no media in `%s'"),
disk->name);
+ else if (status == GRUB_EFI_NOT_FOUND)
+ return grub_error (GRUB_ERR_OUT_OF_RANGE, N_("`%s' not available"),
disk->name);
else if (status != GRUB_EFI_SUCCESS)
return grub_error (GRUB_ERR_READ_ERROR,
N_("failure reading sector 0x%llx from `%s'"),
@@ -606,6 +608,8 @@ grub_efidisk_write (struct grub_disk *disk,
grub_disk_addr_t sector,
if (status == GRUB_EFI_NO_MEDIA)
return grub_error (GRUB_ERR_OUT_OF_RANGE, N_("no media in `%s'"),
disk->name);
+ else if (status == GRUB_EFI_NOT_FOUND)
+ return grub_error (GRUB_ERR_OUT_OF_RANGE, N_("`%s' not available"),
disk->name);
else if (status != GRUB_EFI_SUCCESS)
return grub_error (GRUB_ERR_WRITE_ERROR,
N_("failure writing sector 0x%llx to `%s'"),
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