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bug#20909: incorrect partition size calculation
From: |
Brian C. Lane |
Subject: |
bug#20909: incorrect partition size calculation |
Date: |
Mon, 29 Jun 2015 10:43:36 -0700 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Sat, Jun 27, 2015 at 05:19:03AM +0300, Gena Makhomed wrote:
> Hello, All!
>
> incorrect partition size calculation
>
> # parted -v
> parted (GNU parted) 2.3
>
> Model: ATA HGST HUS724040AL (scsi)
> Disk /dev/sda: 7814037168s
>
> how to reproduce:
>
> parted -s /dev/sda mklabel gpt
> parted -s /dev/sda -a none mkpart primary 34s 2047s
> parted -s /dev/sda set 1 bios_grub on
> parted -s /dev/sda mkpart primary 2048s 2099199s
> parted -s /dev/sda set 2 raid on
> parted -s /dev/sda mkpart primary 2099200s 102764543s
> parted -s /dev/sda set 3 raid on
> parted -s /dev/sda mkpart primary zfs 102764544s 7814037134s
>
> parted
> (parted) unit s
> (parted) print free
> Model: ATA HGST HUS724040AL (scsi)
> Disk /dev/sda: 7814037168s
> Sector size (logical/physical): 512B/512B
> Partition Table: gpt
>
> Number Start End Size File system Name Flags
> 1 34s 2047s 2014s primary bios_grub
> 2 2048s 2099199s 2097152s primary raid
> 3 2099200s 102764543s 100665344s primary raid
> 4 102764544s 7814037134s 7711272591s primary
>
> (parted)
>
> =======================================
>
> parted reports what /dev/sda4 partition has size of 7711272591s
> but this is not true, partition size is 7711272590s:
>
> 7814037168 - 2014 - 2097152 - 100665344 - 34 - 34 == 7711272590
You are off by 1. start and end are inclusive so the size of sda4 is:
1 + (7814037134 - 102764544) = 7711272591
--
Brian C. Lane | Anaconda Team | IRC: bcl #anaconda | Port Orchard, WA (PST8PDT)