Modern drives are not necessary well described by the traditional
cylinder, heads and sectors/track model. I believe that is the reason
we often see warning messages like those below and so have not been
concerned by them before. But I just noticed the line about DOS and
Linux interpreting the contents differently. I believe the extended
partition was created during the ubuntu install as a dual boot over XP
and that Windows has no use for it anyway. Also, I had an external
drive connected via USB when I did the listing (actually the reason I
did it). So, several questions:
1) Is there any concern around the DOS and Linux interpreting
differently message?
2) Is there any reasonable means of partitioning to avoid the cylinder
boundary warnings?
3) Is there any concern about sfdisk expecting sda1 to end two
cylinders later than the partition table says?
larry@ldesk:~$ sudo sfdisk -l
Disk /dev/hda: 155061 cylinders, 16 heads, 63 sectors/track
Warning: extended partition does not start at a cylinder boundary.
DOS and Linux will interpret the contents differently.
Warning: The partition table looks like it was made
for C/H/S=*/255/63 (instead of 155061/16/63).
For this listing I'll assume that geometry.
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/hda1 * 0+ 3781 3782- 30378883+ 7 HPFS/NTFS
/dev/hda2 3782 5862 2081 16715632+ 83 Linux
/dev/hda3 5863 6227 365 2931862+ 5 Extended
/dev/hda4 6228 6835 608 4883760 83 Linux
/dev/hda5 5863+ 6227 365- 2931831 82 Linux swap / Solaris
Disk /dev/sda: 12161 cylinders, 255 heads, 63 sectors/track
Warning: The partition table looks like it was made
for C/H/S=*/16/63 (instead of 12161/255/63).
For this listing I'll assume that geometry.
Units = cylinders of 516096 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sda1 * 0+ 193819 193820- 97685248+ b W95 FAT32
end: (c,h,s) expected (1023,15,63) found (1021,15,63)
/dev/sda2 0 - 0 0 0 Empty
/dev/sda3 0 - 0 0 0 Empty
/dev/sda4 0 - 0 0 0 Empty
larry@ldesk:~$
--
Be who you are and say what you feel, because those who mind don't
matter and those who matter don't mind. - Dr. Seuss
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