--- Begin Message ---
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Subject: |
parted 2.3 assigns wrong GUIDs to GPT partitions |
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Date: |
Thu, 28 Jan 2016 13:54:04 +0100 |
(I discovered this old message being unsent for over a year; maybe it's still
relevant; I didn't re-check)
Hi!
When creating GPT partitions, wrong GUIDs are assigned to the partition type:
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> /usr/sbin/parted /tmp/gpt.img
WARNING: You are not superuser. Watch out for permissions.
GNU Parted 2.3
Using /tmp/gpt.img
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
Warning: The existing disk label on /tmp/gpt.img will be destroyed and all data
on this disk will be lost. Do you want to continue?
Yes/No? yes
(parted) print
Model: (file)
Disk /tmp/gpt.img: 1049kB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
(parted) mkpart ntfs ntfs 0% 25%
Warning: You requested a partition from 0.00B to 262kB.
The closest location we can manage is 17.4kB to 262kB.
Is this still acceptable to you?
Yes/No? y
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? i
(parted) mkpart ext2 ext2 25% 50%
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? i
(parted) mkpart btrfs btrfs 50% 75%
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? i
(parted) mkpart swap linux-swap 75% 100%
Warning: You requested a partition from 786kB to 1048kB.
The closest location we can manage is 786kB to 1031kB.
Is this still acceptable to you?
Yes/No? y
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? i
(parted) p
Model: (file)
Disk /tmp/gpt.img: 1049kB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 17.4kB 262kB 245kB ntfs
2 262kB 524kB 262kB ext2
3 524kB 786kB 262kB btrfs
4 786kB 1032kB 245kB swap
(parted) version
GNU Parted 2.3
Copyright (C) 1998 - 2006 Free Software Foundation, Inc.
This program is free software, covered by the GNU General Public License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
(parted)
---
I use my own program to decode the GPT (irrelevant output removed):
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Disk /tmp/gpt.img
Protective MBR:
MBR Signature =55 aa
Unique Signature = 0
Partition 1:
Boot Indicator: non-bootable
Starting Head = 0
Starting Sector = 1
Starting Cylinder = 0
System ID = 0xee
Ending Head = 254
Ending Sector = 63
Ending Cylinder = 1023
Relative Sectors = 1
Total Sectors = 2047
GPT Header at LBA 1:
EFI Signature =OK
Revision =1.0 (0x00010000)
Header Size =92
CRC Checksum =0x1e722984
Primary LBA = 1
Backup LBA = 2047
First Usable LBA = 34
Last Usable LBA = 2014
Disk GUID =ccc1a21b-2d8d-4be9-9f11-c80916d67687
Partition Entry LBA = 2
Number of Partition Entries =128
Size of Partition Entry =128
Partition Entry Array CRC32 =0xbfb2cf38
Partition Entry = 1
Partition Type GUID =ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
Partition Entry GUID =87ecc1e7-89ba-4f0c-b66e-1664489362f8
Starting LBA = 34
Ending LBA = 511
Partition Entry = 2
Partition Type GUID =ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
Partition Entry GUID =34ccc19e-7d32-474b-9d80-cb8390d14e77
Starting LBA = 512
Ending LBA = 1023
Partition Entry = 3
Partition Type GUID =ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
Partition Entry GUID =cd96003d-d358-43e7-9555-845cf20c17a8
Starting LBA = 1024
Ending LBA = 1535
Partition Entry = 4
Partition Type GUID =0657fd6d-a4ab-43c4-84e5-0933c84b4f4f
Partition Entry GUID =fbc96b01-a479-4222-95b3-6dc67834009b
Starting LBA = 1536
Ending LBA = 2014
Partition Entry = 5
Partition Type GUID =Unused
[...]
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So you see that everything except linux-swap uses the same GUID (Windows data).
According to Wikipedia Linux should use a different GUID for its filesystems.
Regards,
Ulrich
--- End Message ---
--- Begin Message ---
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Subject: |
Re: bug#22482: parted 2.3 assigns wrong GUIDs to GPT partitions |
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Date: |
Mon, 8 Feb 2016 08:48:32 -0500 |
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User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 |
On 1/28/2016 11:51 AM, Brian C. Lane wrote:
> 2.3 is pretty old, the GUID was changed in v3.2 to use the linux data
> GUID.
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