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[Bug 1910586] Re: SD card size constraint conceptually wrong
From: |
Thomas Huth |
Subject: |
[Bug 1910586] Re: SD card size constraint conceptually wrong |
Date: |
Wed, 12 May 2021 11:08:09 -0000 |
The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting the bug state to "Incomplete" now.
If the bug has already been fixed in the latest upstream version of QEMU,
then please close this ticket as "Fix released".
If it is not fixed yet and you think that this bug report here is still
valid, then you have two options:
1) If you already have an account on gitlab.com, please open a new ticket
for this problem in our new tracker here:
https://gitlab.com/qemu-project/qemu/-/issues
and then close this ticket here on Launchpad (or let it expire auto-
matically after 60 days). Please mention the URL of this bug ticket on
Launchpad in the new ticket on GitLab.
2) If you don't have an account on gitlab.com and don't intend to get
one, but still would like to keep this ticket opened, then please switch
the state back to "New" or "Confirmed" within the next 60 days (other-
wise it will get closed as "Expired"). We will then eventually migrate
the ticket automatically to the new system (but you won't be the reporter
of the bug in the new system and thus you won't get notified on changes
anymore).
Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1910586
Title:
SD card size constraint conceptually wrong
Status in QEMU:
Incomplete
Bug description:
The patch discussed here:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg720833.html
introduces an artificial size constraint for SD cards
that has no relation to reality.
I'm trying to use an _actual_ **physical** SD card,
and qemu tells me its size is "invalid".
Something here appears to be conceptually wrong.
--------------------------------------------------
# fdisk -l /dev/sdg
Disk /dev/sdg: 14.84 GiB, 15931539456 bytes, 31116288 sectors
Disk model: USB SD Reader
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x7a0c8bb0
Device Boot Start End Sectors Size Id Type
/dev/sdg1 2048 524287 522240 255M c W95 FAT32 (LBA)
/dev/sdg2 524288 31116287 30592000 14.6G 83 Linux
# qemu-system-aarch64 -M raspi3 -m 1G -kernel vmlinuz-5.4.79-v8 -dtb
bcm2837-rpi-3-b-plus.dtb -append console=ttyAMA0\ root=/dev/mmcblk0p2\ rw
-nographic -serial mon:stdio -drive file=/dev/sdg,format=raw
qemu-system-aarch64: Invalid SD card size: 14.8 GiB
SD card size has to be a power of 2, e.g. 16 GiB.
You can resize disk images with 'qemu-img resize <imagefile> <new-size>'
(note that this will lose data if you make the image smaller than it
currently is).
--------------------------------------------------
The same invocation with a dump of the actual image
resized to match qemu's odd expectations works fine.
This is on QEMU 5.2.0, as evidenced by the following:
--------------------------------------------------
# qemu-system-aarch64 -version
QEMU emulator version 5.2.0
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
--------------------------------------------------
Is there a simple workaround that disables this rather
arbitrary constraint?
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- [Bug 1910586] Re: SD card size constraint conceptually wrong,
Thomas Huth <=