Bug 735441
| Summary: | Incorrect hardcoded sector size in disk storage pool | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Daniel Berrangé <berrange> |
| Component: | libvirt | Assignee: | Libvirt Maintainers <libvirt-maint> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 6.2 | CC: | ajia, dyuan, gsun, mzhan, nzhang, rwu, veillard, whuang |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | libvirt-0.9.4-8.el6 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-12-06 11:27:58 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
# fdisk -l
Note: sector size is 4096 (not 512)
Disk /dev/sdb: 162.8 GB, 162842222592 bytes
255 heads, 63 sectors/track, 2474 cylinders
Units = cylinders of 16065 * 4096 = 65802240 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x000d2129
Device Boot Start End Blocks Id System
Steps:
1. define disk pool on /dev/sdb
2. build and start /dev/sdb
3. create a vol in the disk pool using vol.xml:
<volume>
<name>sdb1</name>
<key>/dev/sdb1</key>
<source>
<device path='/dev/sdb'>
</device>
</source>
<capacity unit='M'>10240</capacity>
<target>
<path>/dev/sdb1</path>
</target>
</volume>
# virsh vol-create sdb vol.xml
4. check the vol info
# virsh vol-info sdb1 --pool sdb
Results:
Step 3:
the vol created successfully.
Step 4:
libvirt-0.9.4-7.2:
# virsh vol-info sdb1 --pool sdb
Name: sdb1
Type: block
Capacity: 1.25 GB
Allocation: 1.25 GB
libvirt-0.9.4-21:
# virsh vol-info sdb1 --pool sdb
Name: sdb1
Type: block
Capacity: 10.00 GB
Allocation: 10.00 GB
So libvirt reports the right size now, no factor x8 defect.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2011-1513.html |
Description of problem: If creating a 'disk' storage pool on a device which has 4k sectors, the size of the partitions reported by libvirt will be x8 too small. This is because libvirt incorrectly hardcoded a 512 byte sector size. Version-Release number of selected component (if applicable): 0.9.4-1.el6 How reproducible: Only with 'disk' storage pool on a device with 4k sectors Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: Upstream fix commit b6263c18013e99bab1938d112fc927f948df3eef Author: Daniel P. Berrange <berrange> Date: Tue Aug 23 15:25:28 2011 +0100 Fix parted sector size assumption Parted does not report disk size in 512 byte units, but rather the disks' logical sector size, which with modern drives might be 4k. * src/storage/parthelper.c: Remove hardcoded 512 byte sector size