Linux Sparc & Sun Disklabel Issue

[Doug Goldstein]

Artem Kachitchkine wrote:
>
>> I'm hoping some of our Sun guys can peek at this and confirm if it's an
>> issue with HAL processing Sun disklabels.
>
> I don't know much about how Linux represents partitioned disks, but
> looking at probe-storage.c and probe-volume.c, HAL on Linux appears to
> rely on partutil. In particular, part_get_scheme_name(). Looking at
> partutil.h:
>
> /* Partition schemes understood by this library */
> typedef enum {
>         PART_TYPE_MSDOS           = 0,
>         PART_TYPE_MSDOS_EXTENDED  = 1,
>         PART_TYPE_APPLE           = 2,
>         PART_TYPE_GPT             = 3
> } PartitionScheme;
>
> I'd say you want to add VTOC type here, some code to recognize it, and
> yet some more code to probe-{storage,volume} (and keep in mind that on
> x86, VTOC can be embedded in a DOS partition).
>
> -Artem.
>
I think it is being contained within a DOS partition.... since partition
type 5 is a DOS partition type..

/sys/block/sda
|-- dev
|-- device -> ../../devices/platform/host0/target0:0:1/0:0:1:0
|-- queue
|   |-- iosched
|   |   |-- antic_expire
|   |   |-- est_time
|   |   |-- read_batch_expire
|   |   |-- read_expire
|   |   |-- write_batch_expire
|   |   `-- write_expire
|   |-- max_hw_sectors_kb
|   |-- max_sectors_kb
|   |-- nr_requests
|   |-- read_ahead_kb
|   `-- scheduler
|-- range
|-- removable
|-- sda1
|   |-- dev
|   |-- size
|   |-- start
|   |-- stat
|   `-- uevent
|-- sda2
|   |-- dev
|   |-- size
|   |-- start
|   |-- stat
|   `-- uevent
|-- sda3
|   |-- dev
|   |-- size
|   |-- start
|   |-- stat
|   `-- uevent
|-- sda4
|   |-- dev
|   |-- size
|   |-- start
|   |-- stat
|   `-- uevent
|-- sda5
|   |-- dev
|   |-- size
|   |-- start
|   |-- stat
|   `-- uevent
|-- size
|-- stat
`-- uevent
===================================
polylepis ~ # fdisk /dev/sda

Command (m for help): p

Disk /dev/sda (Sun disk label): 27 heads, 107 sectors, 49242 cylinders
Units = cylinders of 2889 * 512 bytes

   Device Flag    Start       End    Blocks   Id  System
/dev/sda1             0        43     62113+  83  Linux native
/dev/sda2  u         43        44      1444+  82  Linux swap
/dev/sda3             0     49242  71130069    5  Whole disk
/dev/sda4            44     26410  38085687   83  Linux native
/dev/sda5         26410     49242  32980824   83  Linux native
====================================
Expert command (m for help): p

Disk /dev/sda (Sun disk label): 27 heads, 107 sectors, 15000 rpm
49242 cylinders, 2 alternate cylinders, 49244 physical cylinders
0 extra sects/cyl, interleave 1:1
Linux custom cyl 49242 alt 2 hd 27 sec 107
Units = cylinders of 2889 * 512 bytes

   Device Flag    Start       End    Blocks   Id  System
/dev/sda1             0        43     62113+  83  Linux native
/dev/sda2  u         43        44      1444+  82  Linux swap
/dev/sda3             0     49242  71130069    5  Whole disk
/dev/sda4            44     26410  38085687   83  Linux native
/dev/sda5         26410     49242  32980824   83  Linux native
======================================