GNU bug report logs - #47945
4096 Sector bug

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Eric Wood <ewood <at> uwo.ca>
To: bug-parted <at> gnu.org
Subject: 4096 Sector bug
Date: Wed, 21 Apr 2021 19:46:50 -0400

[Message part 1 (text/plain, inline)]

I recently installed Ubuntu on a SSD with logical/physical sector size 
of 4096/4096.  Everything works fine; however, just for curiosity I did 
a check on the efi partition 500MB, formatted as FAT32.

I got the following error messages: (See image).

This does not happen on a usb drive with 512 byte sectors.

Everything looks fine when I check with fsck.fat:

fsck.fat 4.1 (2017-01-24)
Checking we can access the last sector of the filesystem
Boot sector contents:
System ID "mkfs.fat"
Media byte 0xf8 (hard disk)
      4096 bytes per logical sector
      4096 bytes per cluster
        32 reserved sectors
First FAT starts at byte 131072 (sector 32)
         2 FATs, 32 bit entries
    512000 bytes per FAT (= 125 sectors)
Root directory start at cluster 2 (arbitrary size)
Data area starts at byte 1155072 (sector 282)
    127718 data clusters (523132928 bytes)
63 sectors/track, 255 heads
      2048 hidden sectors
    128000 sectors total
Checking for unused clusters.
Checking free cluster summary.
/dev/sda1: 11 files, 1997/127718 clusters


Here is the output you requested from parted:


Model: Unknown (unknown)
Disk /dev/sda1: 524MB
Sector size (logical/physical): 4096B/4096B
Partition Table: loop
Disk Flags:

Number  Start  End    Size   File system  Flags
 1      0.00B  524MB  524MB  fat32

Model: Unknown (unknown)
Disk /dev/sda1: 128000s
Sector size (logical/physical): 4096B/4096B
Partition Table: loop
Disk Flags:

Number  Start  End      Size     File system  Flags
 1      0s     127999s  128000s  fat32

Model: Unknown (unknown)
Disk /dev/sda1: 55,197,1
Sector size (logical/physical): 4096B/4096B
BIOS cylinder,head,sector geometry: 55,255,9.  Each cylinder is 9400kB.
Partition Table: loop
Disk Flags:

Thanks!

Eric (Wood)

[Untitled3.png (image/png, attachment)]

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "Brian C. Lane" <bcl <at> redhat.com>
To: bug-parted <at> gnu.org
Subject: Re: bug#47945: 4096 Sector bug
Date: Thu, 22 Apr 2021 10:37:01 -0700

On Wed, Apr 21, 2021 at 07:46:50PM -0400, Eric Wood wrote:
> I recently installed Ubuntu on a SSD with logical/physical sector size 
> of 4096/4096.  Everything works fine; however, just for curiosity I did 
> a check on the efi partition 500MB, formatted as FAT32.
> 
> I got the following error messages: (See image).

We need an error from parted in order to diagnose problems, or a
stacktrace from libparted if something crashes.

> This does not happen on a usb drive with 512 byte sectors.
> 
> Everything looks fine when I check with fsck.fat:
> 
> fsck.fat 4.1 (2017-01-24)
> Checking we can access the last sector of the filesystem
> Boot sector contents:
> System ID "mkfs.fat"
> Media byte 0xf8 (hard disk)
>        4096 bytes per logical sector
>        4096 bytes per cluster
>          32 reserved sectors
> First FAT starts at byte 131072 (sector 32)
>           2 FATs, 32 bit entries
>      512000 bytes per FAT (= 125 sectors)
> Root directory start at cluster 2 (arbitrary size)
> Data area starts at byte 1155072 (sector 282)
>      127718 data clusters (523132928 bytes)
> 63 sectors/track, 255 heads
>        2048 hidden sectors
>      128000 sectors total
> Checking for unused clusters.
> Checking free cluster summary.
> /dev/sda1: 11 files, 1997/127718 clusters
> 
> 
> Here is the output you requested from parted:
> 
> 
> Model: Unknown (unknown)
> Disk /dev/sda1: 524MB
> Sector size (logical/physical): 4096B/4096B
> Partition Table: loop
> Disk Flags:
> 
> Number  Start  End    Size   File system  Flags
>   1      0.00B  524MB  524MB  fat32
> 
> Model: Unknown (unknown)
> Disk /dev/sda1: 128000s
> Sector size (logical/physical): 4096B/4096B
> Partition Table: loop
> Disk Flags:
> 
> Number  Start  End      Size     File system  Flags
>   1      0s     127999s  128000s  fat32
> 
> Model: Unknown (unknown)
> Disk /dev/sda1: 55,197,1
> Sector size (logical/physical): 4096B/4096B
> BIOS cylinder,head,sector geometry: 55,255,9.  Each cylinder is 9400kB.
> Partition Table: loop
> Disk Flags:
> 
> Thanks!
> 
> Eric (Wood)
> 

That looks like parted wasn't used to partition the disk, the file
system is starting at sector 0 and the table is 'loop'.

I'm not clear on what you think is wrong with parted.

Brian

-- 
Brian C. Lane (PST8PDT) - weldr.io - lorax - parted - pykickstart

Message #11 received at 47945 <at> debbugs.gnu.org (full text, mbox):

From: Eric Wood <ewood <at> uwo.ca>
To: 47945 <at> debbugs.gnu.org
Subject: My Mistake
Date: Thu, 22 Apr 2021 19:21:34 -0400

I apologize for sending my bug report to the wrong place:  I assumed 
that gparted was just a short form for GNU Parted which it is not.  The 
problem is with gparted not parted.  Sorry for any inconvenience caused.

Cheers!

Eric (Wood)

Message #16 received at 47945-close <at> debbugs.gnu.org (full text, mbox):

From: "Brian C. Lane" <bcl <at> redhat.com>
To: 47945-close <at> debbugs.gnu.org
Subject: Re: bug#47945: My Mistake
Date: Thu, 22 Apr 2021 16:42:59 -0700

On Thu, Apr 22, 2021 at 07:21:34PM -0400, Eric Wood wrote:
> I apologize for sending my bug report to the wrong place:  I assumed 
> that gparted was just a short form for GNU Parted which it is not.  The 
> problem is with gparted not parted.  Sorry for any inconvenience caused.

Thanks for the clarification.

Brian

-- 
Brian C. Lane (PST8PDT) - weldr.io - lorax - parted - pykickstart

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