Posts: 7
Joined: Wed Sep 07, 2016 4:20 pm

Re: How big is the Operating System ?

Fri Sep 09, 2016 1:56 pm

nl3prc wrote:i think you logged in as user pi so fdisisk is not working without sudo before it
...and than enter p voor partitions
Thanks for that! You were "spot-on". Using that, I see:

Command (m for help): p voor partitions
Disk /dev/mmcblk0: 29 GiB, 31104958464 bytes, 60751872 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: 0x00000000

Device Boot Start End Sectors Size Id Type
/dev/mmcblk0p1 2048 262143 260096 127M e W95 FAT16 (LBA)
/dev/mmcblk0p2 262144 60751871 60489728 28.9G 83 Linux

So ~ this, now, is "sort-of" what I had expected (before beginning on this "journey", into Pi-dom).

A comment was made above, that a "full install" ("typical_single_OS") was 4GB or more...
and (correct me if I'm wrong) I was certain from the get-go that each of these 3 OS's could only consume some small fraction of that "disk area".

My question now is:
having typed "m" for Help, after seeing the above info, I now see:
[Generic] n > for "add a new partition"
t > for "change a partition type"
Create a new label <?< (should that say "table"?)
g create a new empty GPT partition table
G create a new empty SGI (IRIX) partition table
o create a new empty DOS partition table
s create a new empty Sun partition table

So : apparently, additional partitions CAN be made on these (32GB) cards.
IF a partition is made for "Storage", is it possible to make that area "viewable" by each (or "any") of the 3 OS's (mentioned previously)?
OR... might it be possible to do so if I erased these (6) cards and started from scratch...?

I am willing to accept that this is a "lost cause" IF, in fact, it is... but, I suspect that the answer is right in front of me, and I just can't see it because of my current state of "unfamiliarity".

Any and all help is greatly appreciated!

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Joined: Wed Jan 25, 2012 6:39 pm

Re: How big is the Operating System ?

Fri Sep 09, 2016 4:42 pm

You can make additional partitions if there is still space left outside the existing primary partitions. You can make additional partitions inside an extended partition if the existing primary partitions in there are not using all of it. You cannot make a new partition inside the unused space in a primary partition but it may be possible to shrink partitions to free up space. And it may be possible to move partitions so that smaller bits of free space are joined together into a single larger space.

All partitions can be made visible to all the OSs on a card and they can have read/write access to file systems in those partitions.

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Re: How big is the Operating System ?

Fri Sep 09, 2016 4:52 pm

The card you are now using is already at the max use
Look at the second partition
/dev/mmcblk0p2 262144 60751871 60489728 28.9G 83 Linux
So there is no more room for any extra partition

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