partmap 15 limit Revisited
mascarasnake
yellowdog-general@lists.terrasoftsolutions.com
Sun Jun 6 14:27:00 2004
thanks muchly on this. excellent tidbit of info. Sadly, I just wiped my
3.0.1 CDs so will have to download the ISOs all over again. I thought
"What with 4.0 coming out, what do I need those 3.0.1 CD's for?". Now I
know.;-)
Daniel Gimpelevich wrote:
> mascarasnake <dontdrill <at> earthlink.net> writes:
>
>
>>Before my question, just a note to Dr. Clint. One of the reasons *nix is
>>so great; I type this email from my 586 (FC1) ssh -X'd into my 7500
>>while I try to rearrange my drives on my G3. Maybe a little too geeky,
>>but, damn that's cool.
>>
>>Now my question -
>>
>>Has anyone else had this funky partmap thing come up? I'm unable to
>>combine the partitions using pdisk on the mac side, using Disk Druid, or
>>using anaconda's pdisk.
>>_______________________________________________
>>yellowdog-general mailing list
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>>HINT: to Google archives, try '<keywords> site:terrasoftsolutions.com'
>>
>>
>
>
> If you look at the major and minor device numbers in the /dev/hdXX and /dev/sdXX
> entries you will see that /dev/hdXX entries advance to the next disk every 64
> minor device numbers, but /dev/sdXX entries advance to the next disk every 16
> minor device numbers! That means that while the Linux kernel could theoretically
> address 63 partitions on IDE devices, only 15 are possible on SCSI or
> SCSI-emulated devices. This flaw is built into the Linux kernel by design, and
> I'm not sure why. This limitation is present on ALL Linux computers, regardless
> of platform or partitioning scheme. I believe it's very likely that this will
> NEVER be fixed.
>
> It is possible to use the pdisk on the YDL 3.0.1 (not 3.0) rescue disk to
> combine adjacent free partitions. Use the 't' command on the second free
> partition in a row and change the type to 'crap' or some such thing. Then delete
> that partition. Voila! One Apple_Free partition!
>
>
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