/stand file system

[ANITH PRABHAKAR .C]

hi experts

can any body tell me, why only HFS is used with /stand file system .why /stand is not supported by JFS

with regards
Anith

[Chan 007]

Anith,

Please find the 2 links, which have the same questions and answered by Experts..

Chan

http://forums1.itrc.hp.com/service/forums/bizsupport/questionanswer.do?threadId=1020398

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=303106

[Torsten.]

If you boot your server, the system will first go to the "build-in" initial system loader (ISL) and starts the OS loader (hpux) from there. This loader is reading the kernel file into the memory (/stand/vmunix) and is only able to handle a HFS filesystem.

[Ajitkumar Rane]

Anith,

As far as I know since HPUX 9.x, hfs as its standard FS. What I understand is the Firmware needs to get upgraded if /stand needs to be vxfs, but to keep the reverse compatiblity it is not changed.
Probably the man page of hpux might be of little help in understanding.

Rgds,

Ajit

[ANITH PRABHAKAR .C]

fist of all thank you for your reply.

i know that system firmware can mount only HFS filesystem

my question is that why it is so ?

[Torsten. · Accepted solution]

The process is like described earlier.

The servers firmware is able to do some simple IO operations. Based on this cabablities, the ISL (initial system loader) and the secondary system loader (hpux - the binary) can be loaded (also via network or fibre channel).
The hpux-binary is now able to do the same basic file handling.

Because of the limited cababilities, the loader can read the "simple" HFS filesystem, but the VxFS structure is too much complicated - he can't read it.

OK?
;-)

[Torsten.]

Points are always appreciated

;-))

(if the answers are helpful)

[Arunvijai_4]

Hi Anith,

Starting from 11.23 (11iV2), you can make /stand as VxFS. It is fully supported.

-Arun

[Torsten.]

Just to complete this.

Integrity Servers (Itanium based) are using a different firmware, called EFI.
The OS loader based on EFI is clever enough to understand vxfs. So at least with HP-UX 11.23 on a itanium system you can make /stand vxfs.