[Touch-packages] [Bug 1481158] Re: sfdisk gets cylinder calculation wrong when using sectors
I suspect that this causes a problem that later versions do not clean up. In this case the sequences was (probably) partition with Trusty, install Trusty, delete Trusty, , install Wily (without re- partitioning). The current partition table as displayed by fdisk on Trusty is clearly wrong for partition three (the one with Wily installed on it). It is not obvious how to fix this without repartitioning, and re- installing. Neither is it obvious how much (if any) real trouble it has caused. There has been persistent non-sense CHS and Disk-ID values on my phone's micro SD card, as well as some reliability trouble. It was partitioned and formatted under Trusty. $ sudo fdisk /dev/sda Welcome to fdisk (util-linux 2.26.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): x Expert command (m for help): v Remaining 54093 unallocated 512-byte sectors. Expert command (m for help): p Disk /dev/sda: 298.1 GiB, 320068705792 bytes, 625134191 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: 0x25f55d02 Device Boot Start End Sectors Id Type Start-C/H/S End-C/H/S Attrs /dev/sda1 * 2048 21655619 21653572 83 Linux 0/33/32 1023/63/25480 /dev/sda221659646 60511 578340866 5 Extended 1023/63/254 1023/63/254 /dev/sda3 60512 625088511 25088000 83 Linux 484/42/77 1021/55/244 /dev/sda4 625121280 625133567 12288 83 Linux 1023/63/254 1023/63/254 /dev/sda521659648 42125311 20465664 83 Linux 1023/63/254 1023/63/254 /dev/sda642127360 62590975 20463616 83 Linux 1023/63/254 1023/63/254 /dev/sda762593024 83071538 20478515 82 Linux swap / Solaris 1023/63/254 1023/63/254 /dev/sda883073024 102602751 19529728 83 Linux 1023/63/254 1023/63/254 /dev/sda9 102604800 122134096 19529297 83 Linux 1023/63/254 1023/63/254 /dev/sda10 122136576 141666303 19529728 83 Linux 1023/63/254 1023/63/254 /dev/sda11 141668352 161197648 19529297 83 Linux 1023/63/254 1023/63/254 /dev/sda12 161200128 54367 438794240 83 Linux 1023/63/254 1023/63/254 /dev/sda13 56416 60511 4096 83 Linux 1023/63/254 1023/63/254 Partition table entries are not in disk order. Expert command (m for help): q -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to util-linux in Ubuntu. https://bugs.launchpad.net/bugs/1481158 Title: sfdisk gets cylinder calculation wrong when using sectors Status in util-linux package in Ubuntu: Fix Released Status in util-linux source package in Trusty: Triaged Bug description: If you try and specify the starting offset for the partition in sectors and ask sfdisk to use the rest of the disk (with "+"), sfdisk will incorrectly calculate the end cylinders and not create the partition. For example --- # dd if=/dev/zero of=/tmp/disk.img bs=1M count=10 # losetup -f /tmp/disk.img # sfdisk -uS /dev/loop1
[Touch-packages] [Bug 1481158] Re: sfdisk gets cylinder calculation wrong when using sectors
I've hit this as well. 2.26 is available in Wily, so any fixes here would be to trusty. It seems like a major rewrite wouldn't be backported in the SRU process though. So this might have to remain unfixed in the LTS unless somebody wants to ferret out the problem and make a smaller patch just for 2.20. ** Changed in: util-linux (Ubuntu) Status: New = Confirmed ** Changed in: util-linux (Ubuntu) Importance: Undecided = High ** Changed in: util-linux (Ubuntu) Status: Confirmed = Fix Released ** Also affects: util-linux (Ubuntu Trusty) Importance: Undecided Status: New ** Changed in: util-linux (Ubuntu Trusty) Status: New = Triaged ** Changed in: util-linux (Ubuntu Trusty) Importance: Undecided = High -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to util-linux in Ubuntu. https://bugs.launchpad.net/bugs/1481158 Title: sfdisk gets cylinder calculation wrong when using sectors Status in util-linux package in Ubuntu: Fix Released Status in util-linux source package in Trusty: Triaged Bug description: If you try and specify the starting offset for the partition in sectors and ask sfdisk to use the rest of the disk (with +), sfdisk will incorrectly calculate the end cylinders and not create the partition. For example --- # dd if=/dev/zero of=/tmp/disk.img bs=1M count=10 # losetup -f /tmp/disk.img # sfdisk -uS /dev/loop1 EOF 2048 + L * 0 0; 0 0; 0 0; EOF Checking that no-one is using this disk right now ... BLKRRPART: Invalid argument OK Disk /dev/loop1: cannot get geometry Disk /dev/loop1: 1 cylinders, 255 heads, 63 sectors/track sfdisk: ERROR: sector 0 does not have an msdos signature /dev/loop1: unrecognized partition table type Old situation: No partitions found New situation: Warning: The partition table looks like it was made for C/H/S=*/71/5 (instead of 1/255/63). For this listing I'll assume that geometry. Units = sectors of 512 bytes, counting from 0 Device BootStart End #sectors Id System /dev/loop1p1 * 2048 20479 18432 83 Linux start: (c,h,s) expected (5,54,4) found (0,32,33) end: (c,h,s) expected (57,48,5) found (1,70,5) /dev/loop1p2 0 - 0 0 Empty /dev/loop1p3 0 - 0 0 Empty /dev/loop1p4 0 - 0 0 Empty Warning: partition 1 does not end at a cylinder boundary end of partition 1 has impossible value for cylinders: 1 (should be in 0-0) sfdisk: I don't like these partitions - nothing changed. (If you really want this, use the --force option.) --- Using the --force flag writes out the correct partitions. I also note this is fixed in 2.26, which has a large rewrite of sfdisk and uses sectors by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1481158/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
