what do "s1" mean in " /dev/dsk/c2t0d0s1" ?

[xxl_1]

on a rx2600 server with hp-ux11.22,I run the command "#ioscan -fnC disk"
disk 1 0/1/1/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373453LC
/dev/dsk/c2t0d0 /dev/dsk/c2t0d0s2 /dev/rdsk/c2t0d0s1
/dev/dsk/c2t0d0s1 /dev/rdsk/c2t0d0 /dev/rdsk/c2t0d0s2

what do "s1" and "s2" mean in " /dev/dsk/c2t0d0s1" and "/dev/dsk/c2t0d0s2"???

[melvyn burnard]

These are the "sections " installed on a boot disk for Itanium servers.
As IA is different to PA, there is a different way of doing the boot disk, as it first must load EFI (s1 section) then boot to the OS (HP-UX in s2). Section 3 (s3) is for the offline diagnostics.

[Robert-Jan Goossens]

Hi xxl,

The s1 partition holds the Master Boor Record, the EFI Partition Table and the EFI System Partition. You can read about it in this doc.

Chapter "Boot disk layout and EFI"

http://www.itrc.hp.com/service/iv/docDisplay.do?docId=prodITRC/DE_SW_UX_swrec_EN_01_E/Itanium.pdf

Hope this helps,
Robert-Jan

[xxl_1]

hi Robert-Jan Goossens

I can't download your "pdf"?

[Robert-Jan Goossens]

attached

[Kent Ostby]

"s" is for section.

It's left over from when single disks were partioned up for multiple filesystems at a hardware level.

Depending on the layout of the disk you wanted to use, you could divide the disk up into various fixed sized segments.