Using util-linux on Ubuntu 13.04:
$ apt-cache policy util-linux | head -2
util-linux:
Installed: 2.20.1-5.1ubuntu8
Working on a 1TB SATA drive containing a cloned image of a damaged 500GB drive recovered using ddrescue. The resulting partition table on the 1TB drive contains 4 primary partitions and only addresses
1/2 the drive, leaving the remainder inaccessible.
I thought to re-write the partition table such that partition #4 is replaced by a Linux Extended partition and partition #5 (logical) takes the values that were in primary partition #4. The problem
here is that the extended partition would start after the first logical partition and that logical partition would not be contained within the extended partition.
I realise this is generally a big no-no, but it was an intermediate step towards creating a second working clone to do repairs in. I figured out the various command-line options to make this work. I
used the "-n" dry-run option and saw the warning:
"Warning: partition 5 is not contained in partition 5"
I can't figure out, having read the source-code for sfdisk.c::partition_ok(), why 'p->ep' (assigned to 'q') is reporting the same partition as 'p'.
I've now converted the MBR to GPT using 'gdisk' but thought I'd report this odd warning message in case its an unknown subtle bug.
The intended partition table was:
$ cat partition-table.sfdisk
63,1000000,83
1000063,16601562,83
17601625,629145601,8e
976773168,976752000,85
646747226,330025942,8e
$
The command-line I used was:
$ sudo sfdisk -n -u S -O WDC_WD10EADS-partition-table.sfdisk --not-inside-outer --not-in-order --force /dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841 <partition-table.sfdisk
Disk /dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841: 121601 cylinders, 255 heads, 63 sectors/track
Old situation:
Units = sectors of 512 bytes, counting from 0
Device Boot Start End #sectors Id System
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part1 63 1000062 1000000 83 Linux
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part2 1000063 17601624 16601562 83 Linux
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part3 17601625 646747225 629145601 8e Linux LVM
start: (c,h,s) expected (1023,254,63) found (71,165,56)
end: (c,h,s) expected (1023,254,63) found (322,38,62)
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part4 646747226 976773167 330025942 8e Linux LVM
start: (c,h,s) expected (1023,254,63) found (322,38,63)
end: (c,h,s) expected (1023,254,63) found (385,80,63)
Warning: bad partition start (earliest 976773169)
New situation:
Units = sectors of 512 bytes, counting from 0
Device Boot Start End #sectors Id System
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part1 63 1000062 1000000 83 Linux
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part2 1000063 17601624 16601562 83 Linux
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part3 17601625 646747225 629145601 8e Linux LVM
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part4 976773168 1953525167 976752000 85 Linux extended
/dev/disk/by-id/ata-WDC_WD10EADS-22M2B0_WD-WCAV5T192841-part5 646747226 976773167 330025942 8e Linux LVM
Warning: partition 5 is not contained in partition 5
-n flag was given: Nothing changed
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