Re: Unusual head_size in 1.6.23?

[Michael Flaster]

I found on another thread where someone asked for some more info, so 
I'll provide it here, in case it's useful.

address@hidden parted-1.6.23]# fdisk /dev/hda -l -u

Disk /dev/hda: 46.1 GB, 46115758080 bytes
255 heads, 63 sectors/track, 5606 cylinders, total 90069840 sectors
Units = sectors of 1 * 512 = 512 bytes

  Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *          63     8193149     4096543+   b  W95 FAT32
/dev/hda2         8193150    90060389    40933620    5  Extended
/dev/hda5         8193213    15358139     3582463+  83  Linux
/dev/hda6        24981138    33961409     4490136   83  Linux
/dev/hda7        40644513    45062324     2208906    b  W95 FAT32
/dev/hda8        48934053    49110704       88326   83  Linux
/dev/hda9        49126833    90060389    20466778+  83  Linux
/dev/hda10       45062388    45576404      257008+  82  Linux swap / Solaris

Partition table entries are not in disk order
address@hidden parted-1.6.23]# fdisk /dev/hda

The number of cylinders for this disk is set to 5606.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
  (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/hda: 46.1 GB, 46115758080 bytes
255 heads, 63 sectors/track, 5606 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

  Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         510     4096543+   b  W95 FAT32
/dev/hda2             511        5606    40933620    5  Extended
/dev/hda5             511         956     3582463+  83  Linux
/dev/hda6            1556        2114     4490136   83  Linux
/dev/hda7            2531        2805     2208906    b  W95 FAT32
/dev/hda8            3047        3057       88326   83  Linux
/dev/hda9            3059        5606    20466778+  83  Linux
/dev/hda10           2806        2837      257008+  82  Linux swap / Solaris

Partition table entries are not in disk order

Command (m for help): x

Expert command (m for help): p

Disk /dev/hda: 255 heads, 63 sectors, 5606 cylinders

Nr AF  Hd Sec  Cyl  Hd Sec  Cyl     Start      Size ID
1 80   1   1    0 254  63  509         63    8193087 0b
2 00   0   1  510 254  63 1023    8193150   81867240 05
3 00   0   0    0   0   0    0          0          0 00
4 00   0   0    0   0   0    0          0          0 00
5 00   1   1  510 254  63  955         63    7164927 83
6 00 254  63 1023 254  63 1023         63    8980272 83
7 00 254  63 1023 254  63 1023         63    4417812 0b
8 00 254  63 1023 254  63 1023         63     176652 83
9 00 254  63 1023 254  63 1023         63   40933557 83
10 00 254  63 1023 254  63 1023         63     514017 82


Mike


Michael Flaster wrote:

> Assertion (head_size <= 63) at disk_dos.c:584 in function
> probe_partition_for_geom() failed.
>
> I added some print statements before the assertion failure:
>    printf("head_size is %lld, from h %lld, H %lld, a_ %lld, c %lld, 
> cyl_size %lld\n",
>           head_size, h, H, a_, c, cyl_size);
>
> and it printed:
> head_size is 63, from h 1, H 254, a_ 63, c 0, cyl_size 16065
> head_size is 573, from h 1, H 254, a_ 8193213, c 510, cyl_size 16064
> (assertion failure)
>
> I checked the computer's math, 573 is the right number from those 
> other values...  :-)
>
> This is with parted GNU Parted 1.6.23.
>
> You probably want some other info about my disk, not exactly sure what 
> to give you.
>
> I can tell you that parted 1.6.21 seemed to work:
> address@hidden parted-1.6.23]# /usr/sbin/parted.old
> GNU Parted 1.6.21
> Copyright (C) 1998 - 2004 Free Software Foundation, Inc.
> This program is free software, covered by the GNU General Public License.
>
> This program is distributed in the hope that it will be useful, but 
> WITHOUT ANY
> WARRANTY; without even the implied warranty of MERCHANTABILITY or 
> FITNESS FOR A
> PARTICULAR PURPOSE.  See the GNU General Public License for more details.
>
> Using /dev/hda
> (parted) print
> Disk geometry for /dev/hda: 0.000-43979.414 megabytes
> Disk label type: msdos
> Minor    Start       End     Type      Filesystem  Flags
> 1          0.031   4000.561  primary   fat32       boot
> 2       4000.562  43974.799  extended             5       4000.592   
> 7499.091  logical   ext2       6      12197.821  16582.719  logical   
> ext3       7      19845.954  22003.088  logical   fat32      10     
> 22003.119  22254.104  logical   linux-swap 8      23893.581  
> 23987.680  logical   ext2       9      23987.711  43974.799  logical   
> ext3       (parted) quit
>
> address@hidden parted-1.6.23]# df -k
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/hda5              3526172   2305476   1041576  69% /
> /dev/hda9              5763616   4323236   1147600  80% /backup
> /dev/hda6              4419512    853248   3566264  20% /home
> /dev/hda1              4088532    883588   3204944  22% /mnt/win_c
> /dev/hda7              2204572     13292   2191280   1% /mnt/win_d
>
> Mike