RZ partitions MAKEDEV DISKLABEL ??

[admin1979]

Hello,

There seem to have lot of confusion or lack of knowledge on my side w.r.t the terms RZ, MAKEDEV, DISKLABEL,offsets etc. Which is essential in TRU64 Administration. I did go through the TRU64 system administration but they dont elaborate onto these terms much.
Kindly suggest from where I can get good understanding of these terms.

Thanks,
sac

[Venkatesh BL]

I think you may be using old version of the OS.

Check out http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V40G_HTML/APS2RFTE/SCSDDRCH.HTM

This has some details about what you are looking for.

[admin1979]

Thanks for the reply.
Does it mean the latest version of TRU64 have different concepts (other than RZ disklabel etc??)

[Venkatesh BL]

After 5.0, RZ* is replaced by /dev/disk/dsk* device names. Disklabel and MAKEDEV are still in use.

[admin1979]

I gone through the link you posted. Is ok ...but is not giving much examples to support the doc. Is that all from TRU64 Documentation?

[Pieter 't Hart]

there is a lot of online documentation for Tru64.
http://www.tru64unix.compaq.com/docs/pub_page/doc_list.html

on the keywords you mention :
- RZ is used in two settings
1) RZ28 is a (SCSI) disk-type
2) /dev/rz1c is a "device special file" used for IO to a partition on a disk
one for each partiton on disk,
and for each partition there is /dev/rz1c and /dev/rrz1c.
These are IO-structures for the OS to communicate with devices.
This is not TRU64-specific but "unix-style" to adress devices as "files".

- MAKEDEV is a utility to create a set of device special files for a device.
NB on Version 5.x /dev/rzxx and /dev/rrz is "legacy" and replaced by the notation /dev/disk/dsk1c
MAKEDEV itself is also "legacy" on v5.x, instead "dsfmgr" (device special file manager" should be used.

- DISKLABEL refers to the (unix)partition table on the disk
partition-names a to h are used, described by offset and size.
in the partition-table partitions may seem to overlap, but only non-overlapping partitions can be used (active) at the same -time

- offset is starting block of the partition

[admin1979]

Thanks for the reply. I am going through the docs to get more inside.