Difference between revisions of "Pre's flash disk"
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(New page: The Pre's flash disk appears to the device as a MMC and uses the standard fdisk partition scheme, with a MBR-like structure in the first block. There are three partitions: # type 0xf0 sta...) |
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The Pre's flash disk appears to the device as a MMC and uses the standard fdisk partition scheme, with a MBR-like structure in the first block. There are three partitions: | The Pre's flash disk appears to the device as a MMC and uses the standard fdisk partition scheme, with a MBR-like structure in the first block. There are three partitions: | ||
| − | # type 0xf0 start 0x00000400 size 0x00002000 NVRAM and Tokens | + | # type 0xf0 start 0x00000400 size 0x00002000 [[NVRAM]] and [[Tokens]] |
# type 0x83 start 0x00002400 size 0x00010000 /boot (ext3) | # type 0x83 start 0x00002400 size 0x00010000 /boot (ext3) | ||
# type 0x8e start 0x00012400 size 0x00f3dc00 Logical Volumes | # type 0x8e start 0x00012400 size 0x00f3dc00 Logical Volumes | ||
| − | The space between the MBR and the first partition are used to store the bootloader ([[Bootie]]). The /boot partition contains the linux kernel (in uImage format) and the minimal userland required to start the LVM and to pivot the root to /dev/mapper/store-root and perform the "real" boot from there. | + | The space between the MBR and the first partition are used to store the bootloader ([[Bootie]]). The /boot partition contains the linux kernel (in uImage format), a copy of the bootloader and the minimal userland required to start the LVM and to pivot the root to /dev/mapper/store-root and perform the "real" boot from there. |
| + | |||
| + | == webos 1.4.5 Pre == | ||
| + | The first 512K contains the MBR and Bootie. | ||
| + | |||
| + | The Flash is set up as follows: | ||
| + | |||
| + | * MBR - 512 Bytes | ||
| + | * Bootie Size - 4 Bytes | ||
| + | * Load Address - 4 Bytes | ||
| + | * Bootie - ~54K for Pre, ~105K for Pixi | ||
| + | * ??? - Rest of 512K space before first partition | ||
| + | * partition 1 (NVRM) - 4M | ||
| + | * partition 2 (/boot) - 32M | ||
| + | * partition 3 (LVM) - rest of Flash | ||
| + | |||
| + | |||
| + | Partitions: | ||
| + | # type 0xf0 start 0x00080000 size 0x00400000 [[NVRAM]] and [[Tokens]] | ||
| + | # type 0x83 start 0x00480000 size 0x02000000 /boot (ext3) | ||
| + | # type 0x8e start 0x02480000 size 0x1e7b8000 Logical Volumes | ||
Latest revision as of 10:17, 4 September 2011
The Pre's flash disk appears to the device as a MMC and uses the standard fdisk partition scheme, with a MBR-like structure in the first block. There are three partitions:
- type 0xf0 start 0x00000400 size 0x00002000 NVRAM and Tokens
- type 0x83 start 0x00002400 size 0x00010000 /boot (ext3)
- type 0x8e start 0x00012400 size 0x00f3dc00 Logical Volumes
The space between the MBR and the first partition are used to store the bootloader (Bootie). The /boot partition contains the linux kernel (in uImage format), a copy of the bootloader and the minimal userland required to start the LVM and to pivot the root to /dev/mapper/store-root and perform the "real" boot from there.
webos 1.4.5 Pre
The first 512K contains the MBR and Bootie.
The Flash is set up as follows:
- MBR - 512 Bytes
- Bootie Size - 4 Bytes
- Load Address - 4 Bytes
- Bootie - ~54K for Pre, ~105K for Pixi
- ??? - Rest of 512K space before first partition
- partition 1 (NVRM) - 4M
- partition 2 (/boot) - 32M
- partition 3 (LVM) - rest of Flash
Partitions: