Partitioning system for Sun Sparc machines

Infos extracted from File System Forensic Analysis, Brian Carrier and in particular the online copy here), tables 6.9 and 6.10.

The format is called VTOC (volume table of contents). It is stored at offset 0 on-disk. All values are big endian.

Note that the x86 version of Solaris uses a different layout.

Byte offset	Description
0-127	ASCII disk label
128-261	VTOC *
262-263	Sectors to skip when writing
264-265	Setors to skip when reading
266-419	Reserved
420-421	Disk speed
422-423	Number of cylinders
424-425	Alternates per cylinder
426-429	Reserved
430-431	Interleave
432-433	Number of data cylinders
434-435	Number of alternate cylinders
436-437	Number of heads
438-439	Number of sectors per track
440-443	Reserved
444-451	Partition 1 disk map
…	More partition disk maps
500-507	Partition 8 disk map
508-509	Signature (0xDABE)
510-511	Checksum

The VTOC itself:

0-3	Version
4-11	Volume name
12-13	Number of partitions
14-15	Partition 1 type
16-17	Partition 1 flags
…	More partition types and flags
42-45	Partition 8 type and flags
46-57	Boot info
58-59	Reserved
60-63	Signature 0x600DDEEE
64-101	Reserved
102-105	Partition 1 timestamp
…	More partition timestamps
130-133	Parittion 8 timestamp

Partition types (informative):

0. unassigned

1. /boot

2. /

3. swap

4. /usr

5. entire disk

6. /stand

7. /var

8. /home

9. alternate sector

10. cachefs

Partition flags:

• 1 - Not mountable

• 128 - read only

Disk maps:

0-3	Starting cylinder
4-7	Size (in sectors)