68ea01249e
This is the partitioning system used on sparc machines. Confirmed working with a Solaris install iso image. Added to the haiku package for sparc and to haiku_extras for other architectures. Fixes #15638 Change-Id: I0584bef5e6a66eff9a33eb6675d5533cc9a45d1e Reviewed-on: https://review.haiku-os.org/c/haiku/+/2709 Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
Partitioning system for Sun Sparc machines
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==========================================
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Infos extracted from [File System Forensic Analysis, Brian Carrier](urn:isbn:0-134-43954-6)
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and in particular the [online copy here](https://books.google.fr/books?id=Zpm9CgAAQBAJ&lpg=PT159&ots=6LIQ6blJCF&dq=solaris%20vtoc%20structure&hl=fr&pg=PT159#v=onepage&q=solaris%20vtoc%20structure&f=false), tables 6.9 and 6.10.
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The format is called VTOC (volume table of contents). It is stored at offset 0
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on-disk. All values are big endian.
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Note that the x86 version of Solaris uses a different layout.
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Byte offset|Description
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0-127 |ASCII disk label
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128-261 |VTOC *
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262-263 |Sectors to skip when writing
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264-265 |Setors to skip when reading
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266-419 |Reserved
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420-421 |Disk speed
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422-423 |Number of cylinders
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424-425 |Alternates per cylinder
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426-429 |Reserved
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430-431 |Interleave
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432-433 |Number of data cylinders
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434-435 |Number of alternate cylinders
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436-437 |Number of heads
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438-439 |Number of sectors per track
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440-443 |Reserved
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444-451 |Partition 1 disk map
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... |More partition disk maps
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500-507 |Partition 8 disk map
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508-509 |Signature (0xDABE)
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510-511 |Checksum
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The VTOC itself:
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0-3 Version
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4-11 Volume name
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12-13 Number of partitions
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14-15 Partition 1 type
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16-17 Partition 1 flags
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... More partition types and flags
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42-45 Partition 8 type and flags
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46-57 Boot info
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58-59 Reserved
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60-63 Signature 0x600DDEEE
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64-101 Reserved
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102-105 Partition 1 timestamp
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... More partition timestamps
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130-133 Parittion 8 timestamp
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Partition types (informative):
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0 unassigned
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1 /boot
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2 /
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3 swap
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4 /usr
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5 entire disk
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6 /stand
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7 /var
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8 /home
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9 alternate sector
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10 cachefs
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Partition flags:
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1 Not mountable
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128 read only
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Disk maps:
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0-3 Starting cylinder
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4-7 Size (in sectors)
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