topic Re: Disk device file in Operating System - HP-UX

Disk device file

Sakui — Tue, 03 Jul 2007 14:29:54 GMT

I have a rx 1620 with two internal disks. But i have not seen a smart card or RAID card on the server. After i installed the server i can't see the device file of the second disk.
This is what i see when i do ioscan -fnC disk.

#
#
#
# ioscan -fnC disk
Class I H/W Path Driver S/W State H/W Type Description
============================================================================
disk 0 0/0/2/0.0.0.0 sdisk CLAIMED DEVICE _NEC DVD+-RW
ND-6650A
/dev/dsk/c0t0d0 /dev/rdsk/c0t0d0
disk 1 0/1/1/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373455
LC
/dev/dsk/c2t0d0 /dev/rdsk/c2t0d0
disk 2 0/1/1/0.1.0 sdisk CLAIMED DEVICE HP 73.4GST373455
LC
/dev/dsk/c2t1d0 /dev/rdsk/c2t1d0
/dev/dsk/c2t1d0s1 /dev/rdsk/c2t1d0s1
/dev/dsk/c2t1d0s2 /dev/rdsk/c2t1d0s2
/dev/dsk/c2t1d0s3 /dev/rdsk/c2t1d0s3
#

when i do vgdisplay on this existing volume this is what i get.

# vgdisplay -v vg00
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 8
Open LV 8
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 4328
VGDA 2
PE Size (Mbytes) 16
Total PE 4318
Alloc PE 1869
Free PE 2449
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
LV Name /dev/vg00/lvol1
LV Status available/syncd
LV Size (Mbytes) 1792
Current LE 112
Allocated PE 112
Used PV 1

LV Name /dev/vg00/lvol2
LV Status available/syncd
LV Size (Mbytes) 6144
Current LE 384
Allocated PE 384
Used PV 1

LV Name /dev/vg00/lvol3
LV Status available/syncd
LV Size (Mbytes) 560
Current LE 35
Allocated PE 35
Used PV 1

LV Name /dev/vg00/lvol4
LV Status available/syncd
LV Size (Mbytes) 512
Current LE 32
Allocated PE 32
Used PV 1

LV Name /dev/vg00/lvol5
LV Status available/syncd
LV Size (Mbytes) 112
Current LE 7
Allocated PE 7
Used PV 1

LV Name /dev/vg00/lvol6
LV Status available/syncd
LV Size (Mbytes) 7104
Current LE 444
Allocated PE 444
Used PV 1

LV Name /dev/vg00/lvol7
LV Status available/syncd
LV Size (Mbytes) 7024
Current LE 439
Allocated PE 439
Used PV 1

LV Name /dev/vg00/lvol8
LV Status available/syncd
LV Size (Mbytes) 6656
Current LE 416
Allocated PE 416
Used PV 1

--- Physical volumes ---
PV Name /dev/dsk/c2t1d0s2
PV Status available
Total PE 4318
Free PE 2449
Autoswitch On

#
i don't want my device to appear like that. I need to have seperate and unique devices file for each.so how do i get rid of those sub device file under /dev/dsk/c2t0d0.

Re: Disk device file

Andrew Rutter — Tue, 03 Jul 2007 14:40:38 GMT

sakui,

your output looks perfectly normal.

you have two disks as shown in your ioscan

c2t0d0 and c2t1d0

/dev/dsk/c0t0d0 /dev/rdsk/c0t0d0
disk 1 0/1/1/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373455
LC
/dev/dsk/c2t0d0 /dev/rdsk/c2t0d0
disk 2 0/1/1/0.1.0 sdisk CLAIMED DEVICE HP 73.4GST373455
LC
/dev/dsk/c2t1d0 /dev/rdsk/c2t1d0
/dev/dsk/c2t1d0s1 /dev/rdsk/c2t1d0s1
/dev/dsk/c2t1d0s2 /dev/rdsk/c2t1d0s2
/dev/dsk/c2t1d0s3 /dev/rdsk/c2t1d0s3

the sub device files as you call them are actually on c2t1d0, and these are normal for intergity servers.

The disk has to be partitioned this way, s1 for efi, s2 for root VG and s3 for the service partition.

the other disk may be ready for use if not used already?

what exactly are you trying to do? mirror the disks?

Andy

Re: Disk device file

Torsten. — Tue, 03 Jul 2007 15:01:43 GMT

Hi,

your first Integrity?

As mentioned before, there are 2 disks:

dev/dsk/c2t0d0 /dev/rdsk/c2t0d0
and
dev/dsk/c2t1d0 /dev/rdsk/c2t1d0

The s1, s2, s3 entries are partitons - pretty normal for Integrity boot disks.

If you don't want to see this device files you need to install another OS ;-)

Re: Disk device file

Torsten. — Tue, 03 Jul 2007 15:06:18 GMT

If you want to mirror your disks, see the appendix here:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

Re: Disk device file

Sakui — Tue, 03 Jul 2007 15:22:17 GMT

My main reason is that i can't see the device file for the second disk. /dev/dsk/c0t0d0 is for my DVD drive wht is the device file for my second drive.
i mounted my cdrom with the /dev/dsk/c0t0d0.

Re: Disk device file

Andrew Rutter — Tue, 03 Jul 2007 15:40:56 GMT

hi,

this is your 2nd disk

disk 1 0/1/1/0.0.0 sdisk CLAIMED DEVICE HP 73.4GST373455
LC
/dev/dsk/c2t0d0 /dev/rdsk/c2t0d0

the device files are listed under the hardware path for each device

both disks are attached to the same controller C2 with a scsi ID of 0 and 1(t1,t2)

you are right that the dvd is c0t0d0

Andy