Yasuhiro KIMURA
2020-Dec-01 00:33 UTC
Size of EFI system partition is much smaller when it is mounted
I made clean install of 11.4-RELEASE amd64 with ZFS root and UEFI boot
mode. 'Auto (ZFS)' was used at disk setup phase and disk was
partitioned as following.
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root at rolling-vm-freebsd3[80]# uname -a
FreeBSD rolling-vm-freebsd3.home.utahime.org 11.4-RELEASE-p3 FreeBSD
11.4-RELEASE-p3 #0: Tue Sep 1 08:22:33 UTC 2020 root at
amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
root at rolling-vm-freebsd3[81]# gpart show ada0
=> 40 209715120 ada0 GPT (100G)
40 409600 1 efi (200M)
409640 2008 - free - (1.0M)
411648 16777216 2 freebsd-swap (8.0G)
17188864 192524288 3 freebsd-zfs (92G)
209713152 2008 - free - (1.0M)
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According to it the size of EFI system partition is 200MB. But if I
mount it to filesystem and check its size with df(1), then it is much
smaller than 200MB.
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root at rolling-vm-freebsd3[82]# mount -t msdosfs /dev/ada0p1 /mnt
root at rolling-vm-freebsd3[83]# df -k /mnt
Filesystem 1024-blocks Used Avail Capacity Mounted on
/dev/ada0p1 779 384 395 49% /mnt
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And if I try to copy large file to /mnt then it fails.
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root at rolling-vm-freebsd3[94]# ls -l dummy.1MB.date
-rw-r--r-- 1 root wheel 1048576 Nov 29 10:39 dummy.1MB.date
root at rolling-vm-freebsd3[95]# cp dummy.1MB.date /mnt
cp: /mnt/dummy.1MB.date: No space left on device
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So it seems kernel(?) really regards the size of mounted EFI system
part as only 779KB.
I also tried it with 12.2-RELEASE and df(1) reported correctly.
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root at eastasia[1002]# uname -a
FreeBSD eastasia.home.utahime.org 12.2-RELEASE FreeBSD 12.2-RELEASE r366954
GENERIC amd64
root at eastasia[1003]# gpart show ada0
=> 40 1953525088 ada0 GPT (932G)
40 409600 1 efi (200M)
409640 2008 - free - (1.0M)
411648 16777216 2 freebsd-swap (8.0G)
17188864 1936334848 3 freebsd-zfs (923G)
1953523712 1416 - free - (708K)
root at eastasia[1004]# mount -t msdosfs /dev/ada0p1 /mnt
root at eastasia[1005]# df -k /mnt
Filesystem 1024-blocks Used Avail Capacity Mounted on
/dev/ada0p1 204696 976 203720 0% /mnt
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Is there any bug fix about it that is merged to 12.x but not 11.x?
Best Regards.
---
Yasuhiro KIMURA
Warner Losh
2020-Dec-01 04:44 UTC
Size of EFI system partition is much smaller when it is mounted
On Mon, Nov 30, 2020 at 5:35 PM Yasuhiro KIMURA <yasu at utahime.org> wrote:> I made clean install of 11.4-RELEASE amd64 with ZFS root and UEFI boot > mode. 'Auto (ZFS)' was used at disk setup phase and disk was > partitioned as following. > > ---------------------------------------------------------------------- > root at rolling-vm-freebsd3[80]# uname -a > FreeBSD rolling-vm-freebsd3.home.utahime.org 11.4-RELEASE-p3 FreeBSD > 11.4-RELEASE-p3 #0: Tue Sep 1 08:22:33 UTC 2020 > root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 > root at rolling-vm-freebsd3[81]# gpart show ada0 > => 40 209715120 ada0 GPT (100G) > 40 409600 1 efi (200M) > 409640 2008 - free - (1.0M) > 411648 16777216 2 freebsd-swap (8.0G) > 17188864 192524288 3 freebsd-zfs (92G) > 209713152 2008 - free - (1.0M) > ---------------------------------------------------------------------- > > According to it the size of EFI system partition is 200MB. But if I > mount it to filesystem and check its size with df(1), then it is much > smaller than 200MB. > > ---------------------------------------------------------------------- > root at rolling-vm-freebsd3[82]# mount -t msdosfs /dev/ada0p1 /mnt > root at rolling-vm-freebsd3[83]# df -k /mnt > Filesystem 1024-blocks Used Avail Capacity Mounted on > /dev/ada0p1 779 384 395 49% /mnt > ---------------------------------------------------------------------- > > And if I try to copy large file to /mnt then it fails. > > ---------------------------------------------------------------------- > root at rolling-vm-freebsd3[94]# ls -l dummy.1MB.date > -rw-r--r-- 1 root wheel 1048576 Nov 29 10:39 dummy.1MB.date > root at rolling-vm-freebsd3[95]# cp dummy.1MB.date /mnt > cp: /mnt/dummy.1MB.date: No space left on device > ---------------------------------------------------------------------- > > So it seems kernel(?) really regards the size of mounted EFI system > part as only 779KB. > > I also tried it with 12.2-RELEASE and df(1) reported correctly. > > ---------------------------------------------------------------------- > root at eastasia[1002]# uname -a > FreeBSD eastasia.home.utahime.org 12.2-RELEASE FreeBSD 12.2-RELEASE > r366954 GENERIC amd64 > root at eastasia[1003]# gpart show ada0 > => 40 1953525088 ada0 GPT (932G) > 40 409600 1 efi (200M) > 409640 2008 - free - (1.0M) > 411648 16777216 2 freebsd-swap (8.0G) > 17188864 1936334848 3 freebsd-zfs (923G) > 1953523712 1416 - free - (708K) > > root at eastasia[1004]# mount -t msdosfs /dev/ada0p1 /mnt > root at eastasia[1005]# df -k /mnt > Filesystem 1024-blocks Used Avail Capacity Mounted on > /dev/ada0p1 204696 976 203720 0% /mnt > ---------------------------------------------------------------------- > > Is there any bug fix about it that is merged to 12.x but not 11.x? >11.x puts a pre-canned image into the ESP that's tiny, regardless of the size, while 12.x does a newfs_msdos and sizes it properly. It's kinda hard to fix in 11.x since there's a number of changes in a number of places. You can, though, on 11.x, newfs_msdos the filesystem and copy boot1.efi from FreeBSD's /boot to the ESP's \efi\boot\bootx64.efi if you need more space on the ESP for some reason. Warner