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On 08/06/2010 11:55 AM, JB wrote:
JB <jb.123abc <at> yahoo.com> writes:
Hi,
let me follow the previous post with another example.
One more "rule to follow" with regard to partitions:
http://www.lissot.net/partition/partition-03.html
...
Unlike primary partitions, logical partitions must be contiguous. Each logical
partition contains a pointer to the next logical partition, ...
OK.
Now another example of a disk layout (also Paul Cartwright's, but a different
computer - Dell XPS desktops):
Btw Paul, is that disk also partitioned by Anaconda tool ?
Between partitions 2 and 4 there is a free space marked as "logical".
Logical 219463964* 219463964 0 1*Free Space
None
It is clearly outside of the Extended partition range.
How comes it is called "logical" if it violates the rule of contiguousness ?
# cfdisk -Ps
Partition Table for /dev/sda
First Last
# Type Sector Sector Offset Length Filesystem Type (ID)
Flag
-- ------- ----------- ----------- ------ ----------- -------------------- ----
1 Primary 0 128519 63 128520 Dell Utility (DE)
None
2 Primary 128520 219463963* 0 219335444*HPFS/NTFS (07)
Boot
Logical 219463964* 219463964 0 1*Free Space
None
The space immediately above lies between the end of partition 2 and the start of
partition 4 (your extended partition), which maps in front of partition 3.
It is unused, and *UNUSABLE* space (unusable, due to the fact that it is
*impossible* to map it with a partition id given your current partition layout).
Labeling it as "logical" is, well, not logical, in that it isn't a logical
partition. In fact, it's not a partition at all, as noted by the fact that it
doesn't have a partition id #). Labling it as "void" would be a more
accurate
description of this disk space.
The only way to claim this space would be to backup everything on the disk,
repartition without leaving a "void", and then restore.
Since it is only 1 sector big, I wouldn't bother with trying to reclaim it. (It
may, in fact, not be reclaimable -- in Linux, partitioning is usually done on
cyl boundaries).
- -Greg
4 Primary 219463965 615401954 0 395937990 W95 Ext'd
(LBA) (0F)
None
5 Logical 219463965 223672994 63 4209030 Linux swap / So (82)
None
6 Logical 223672995 265618709 63 41945715 Linux (83)
Boot
7 Logical 265618710 615401954 63 349783245 Linux (83)
None
3 Primary 615401955 625137344 0 9735390 CP/M / CTOS / . (DB)
None
# fdisk -l
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe686f016
Device Boot Start End Blocks Id System
/dev/sda1 1 8 64228+ de Dell Utility
/dev/sda2 * 9 13661 109667722 7 HPFS/NTFS
/dev/sda3 38308 38913 4867695 db CP/M / CTOS / ...
/dev/sda4 13662 38307 197968995 f W95 Ext'd (LBA)
/dev/sda5 13662 13923 2104483+ 82 Linux swap / Solaris
/dev/sda6 * 13924 16534 20972826 83 Linux
/dev/sda7 16535 38307 174891591 83 Linux
JB
- --
+---------------------------------------------------------------------+
Please also check the log file at "/dev/null" for additional information.
(from /var/log/Xorg.setup.log)
| Greg Hosler ghosler(a)redhat.com |
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