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[debbugs-tracker] bug#20909: closed (incorrect partition size calculatio

From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#20909: closed (incorrect partition size calculation)
Date: Thu, 02 Jul 2015 18:04:02 +0000

Your message dated Thu, 02 Jul 2015 14:02:14 -0400
with message-id <address@hidden>
and subject line Re: bug#20909: incorrect partition size calculation
has caused the debbugs.gnu.org bug report #20909,
regarding incorrect partition size calculation
to be marked as done.

(If you believe you have received this mail in error, please contact

20909: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=20909
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: incorrect partition size calculation Date: Sat, 27 Jun 2015 05:19:03 +0300 User-agent: Mozilla/5.0 (Windows NT 5.2; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
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) 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 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


sorry, I can't find bugzilla for parted and can't check
what this bug for parted was previously reported and fixed.

Best regards,

--- End Message ---
--- Begin Message --- Subject: Re: bug#20909: incorrect partition size calculation Date: Thu, 02 Jul 2015 14:02:14 -0400 User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
On 6/29/2015 2:37 PM, Gena Makhomed wrote:
You are off by 1. start and end are inclusive so the size of sda4 is:

1 + (7814037134 - 102764544) = 7711272591

Closing for this reason.

BTW, "start and end are inclusive" - IMHO is very bad decision,
because now it is not possible to partition disk using MiB units
and always need use sectors and make all calculations manually.

No.. MiB units work just fine.

for example, parted -s /dev/sda mkpart primary 34s 1MiB
now use one sector from second MiB and next partition
will be created as unaligned.

No, it doesn't... the partition ends on sector 2047, so the next partition can start on sector 2048.

--- End Message ---

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