[DragonFlyBSD - Bug #3369] (Resolved) installer fails to use entire disk: legacy BIOS, qemu, virtio_blk

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #3369 has been updated by dillon.

Status changed from Feedback to Resolved
Assignee set to dillon

I have pushed a fix to the virtio driver instead of to fdisk.  Pushed to both the release branch and to master. The driver now detects that qemu capped the cylinder count it reports to the kernel and recalculates the ncylinders it reports to fdisk.  Please test.

----------------------------------------
Bug #3369: installer fails to use entire disk: legacy BIOS, qemu, virtio_blk 
http://bugs.dragonflybsd.org/issues/3369#change-14593

* Author: mikdusan
* Status: Resolved
* Priority: Normal
* Assignee: dillon
* Category: installer
* Target version: 6.6
* Start date: 2024-05-25
----------------------------------------
Install fails to use entire disk and sets size to 8063MB.

For example, create a qemu image of 20GB and install. The resulting system disk is ~8GB in size, underutilizing the full 20GB. This bug manifests when:
1. performing qemu guest install
2. guest configured to use virtio_blk for qemu img that is installation target
3. qemu img is new (all zeros) and has not yet been partitioned
4. dfly installer legacy BIOS is selected

Workaround: repeat the select-disk after formatting for first time
1. select: Install DragonFly BSD
2. select: Legacy BIOS
3. select: vbd0
4. select: Use Entire Disk
5. select: *RETURN TO SELECT DISK* (instead of selecting file system) to repeat steps 1...4

Reduction: use @fdisk@ to summarize the disk; the result must be as follows; specifically there must be no line beginning with @/dev/vbd0@ supplying disk geometry:
<pre>
fdisk -s vbd0
fdisk: invalid fdisk partition table found
fdisk: read_s0: Undefined error: 0
</pre>

Anti-Reduction: bug will *not* manifest if @fdisk@ shows any @/dev/vbd0@ disk geometry as follows:
<pre>
fdisk -s vbd0
...
/dev/vbd1: 41610 cyl 16 hd 63 sec
Part        Start        Size Type Flags
...
</pre>

---Files--------------------------------
fdisk-cyls.patch (872 Bytes)


-- 
You have received this notification because you have either subscribed to it, or are involved in it.
To change your notification preferences, please click here: http://bugs.dragonflybsd.org/my/account