|From:||Diederik de Haas|
|Subject:||bug#21136: Fwd: Inconsistent behavior creating partitions with 'Xmib' and 'X%' (off-by-1 error?)|
|Date:||Sun, 22 Aug 2021 20:39:40 +0200|
I send the msg below to the email@example.com list, but I'm not sure it arrived. https://lists.gnu.org/archive/html/bug-parted/ are refreshed every 15 minutes, but after > 30 minutes, it hadn't shown up. Then I searched the bug-parted archive and found bug #21136 which seems VERY related to my issue. Sorry for not searching first. I made a copy of the 'parted-bug-test-mb.sh' script and replaced 'mib' with 'MiB' and that went better, although it too failed to create the 4th partition, but that's likely due to qemu's 100M != 100MiB according to parted. So it seems like the bug is still present in 3.4. ---------- Forwarded Message ---------- Subject: Inconsistent behavior creating partitions with 'Xmib' and 'X%' (off- by-1 error?) Date: zondag 22 augustus 2021, 19:59:06 CEST From: Diederik de Haas <firstname.lastname@example.org> To: email@example.com [I'm not sure this is the appropriate place/way and if not, apologies, and can you point me to the right place/way] Hi, This is a forward of https://bugs.debian.org/988146 where I reported that partitions were created differently when using 'mib' unit vs '%' unit. To demonstrate it, I created 3 scripts which creates a 100MB image and do the partitioning within that. When reporting the Debian bug, I only had the mixed test and 'parted-bug-test- mixed.sh' is identical to the one attached here, apart from an 'else' clause which explicitly deletes a prior created image. In parted-bug-test-mixed.sh, I mixed 'mib' and '%' and due to the 100MB, that should've worked, but it did not. When using only 'mib' then the script fails too. When using only '%' then the script succeeds. I think parted does the right thing when using '%'. Relevant portion of output when running the mixed script: ======================================================= Creating partition table ... Done Creating 1st partition ('4mib' '20%') ... Done Creating 2nd partition ('20%' '40%' ... Done Creating 3rd partition ('40mib' '60mib') ... Done Showing partition layout Disk temp/parted-test.img: 100 MiB, 104857600 bytes, 204800 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x03f77810 Device Boot Start End Sectors Size Id Type temp/parted-test.img1 8192 40959 32768 16M c W95 FAT32 (LBA) temp/parted-test.img2 40960 81919 40960 20M 83 Linux temp/parted-test.img3 81920 122880 40961 20M 83 Linux Creating 4th partition ('60mib' '100%' ... Error: You requested a partition from 62,9MB to 105MB (sectors 122880..204799). The closest location we can manage is 62,9MB to 105MB (sectors 122881..204799). ======================================================= Cheers, Diederik -----------------------------------------
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