[blfs-support] X unsolved and networking solved

Bruce Dubbs bruce.dubbs at gmail.com
Fri May 4 10:29:19 PDT 2012


Ken Moffat wrote:
> On Fri, May 04, 2012 at 11:14:19AM -0500, Bruce Dubbs wrote:
>> Ken Moffat wrote:
>>
>>>  Actually, 10 bootable partitions on a dos disk is pushing it  - I
>>> suppose one or more of /boot, /home, swap is in a primary partition.
>> Why?
>>
>> As of Jan 20, 2010
>>
>> Disk /dev/sda: 320.1 GB, 320072933376 bytes
>> 255 heads, 63 sectors/track, 38913 cylinders
>> Units = cylinders of 16065 * 512 = 8225280 bytes
>> Disk identifier: 0x00000080
>>
>>     Device Boot      Start         End
>> /dev/sda1   *          63      208844   /boot       100M
>> /dev/sda2          208845    19743884   /opt         10G minus
>> /dev/sda3        19743885    25607609   Swap          2G
>> /dev/sda4        25607671   439398399   Extended
>> /dev/sda5        25607673    46588499   lfs-7.0-rc?  10G
>> /dev/sda6        46588563    67569389   lfs-6.5      10G Aug 2009
>> /dev/sda7        67569453    87104429   Ubuntu 9.04  10G minus
>> /dev/sda8        87104493   108085319   blfs dev     10G
>> /dev/sda9       108085383   191992814   /usr/src     40G
>> /dev/sda10      191992878   233954594   /mnt/backup  20G
>> /dev/sda11      233954658   254935484   /home        10G
>> /dev/sda12      254935548   317862089   ??           30G
>> /dev/sda13      317862153   338842979   lfs-20110110 10G
>> /dev/sda14      338843043   359823869   lfs-20100816 10G
>> /dev/sda15      359823933   380804759   lfs-7.1-rc1  10G
>> /dev/sda16      380805120   419866623   ubuntu 11.04 20G
>> /dev/sda17      419868672   439398399   ubuntu 10.10 9G
>>
>>
>>    -- Bruce
> 
>  I believed, obviously wrongly, that the maximum value for a logical
> partition on dos disks was 15.

I think the max is 63, but that would be in the kernel and maybe grub.

>  Did you have to do the math yourself to get the sizes in that
> table ?

Yes.  I just did fdisk -l /dev/sda > disk-layout and edited that to add my notes.

   -- Bruce



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