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Urgent: About VA7100 Configuration

Leon Shen
Frequent Advisor

Urgent: About VA7100 Configuration

Hi Experts,

Currently my customer just upgrade their VA7100, add in 7x73GB into existing 8x36.4GB. Their created 2 LUNs from the VA7100. I have copy down the ioscan -FunC disks outputs
and it shows
c1t2d0(root disk), c3t2d0(cdrom),
c5t0d0,
c5t0d1,
c5t0d2,
c5t0d3,
c0t5d4,
c0t5d5,
c5t0d6,
c5t0d7,
c5t1d0,
c5t1d1,
c7t0d0,
c7t0d1,
c7t0d2,
c7t0d3,
c7t0d4,
c7t0d5,
c7t0d6,
c7t0d7,
c7t1d0,
c7t1d1.
They have disable the secure manager and it shows double entry of LUNs. I guess the lun and physcial hard disks mix together.

2)if the 2 new LUNs is created, does it shows 4 new entries?

3) if yes, it is correct to just use 2 new LUN create the 2 file systems on just 2 of the 4 entries?

4) Following the steps to create 2 file systems after LUN create by commandview.

#ioscan -funC disk (scan Harddisk)
#pvcreate -f /dev/rdsk/cxtxdx (cxtxdx refer the LUN or physcial hardisk)
#mkdir /dev/vg03
#cd /dev/vg03
#mknod /dev/vg03/group c 64 0x030000
#vgcreate /dev/vg03 /dev/dsk/cxtxdx /dev/rdsk/cytxdx
#lvcreate -L 10000 /dev/vg03/lvol1
#lvcreate -L 35000 /dev/vg03/lvol2
#newfs -F vxfs /dev/vg03/rlvol1
#newfs -F vxfs /dev/vg03/rlvol2
After mount the file systems accordingly.

Best regards
Leon
5 REPLIES
Leon Shen
Frequent Advisor

Re: Urgent: About VA7100 Configuration

Sorry guys the actualy output for ioscan -funC disks
should be like
c1t2d0(root disk), c3t2d0(cdrom),
c5t0d0,
c5t0d1,
c5t0d2,
c5t0d3,
c5t0d4,
c5t0d5,
c5t0d6,
c5t0d7,
c5t1d0,
c5t1d1,
c7t0d0,
c7t0d1,
c7t0d2,
c7t0d3,
c7t0d4,
c7t0d5,
c7t0d6,
c7t0d7,
c7t1d0,
c7t1d1.
Mahadev Pednekar
Frequent Advisor

Re: Urgent: About VA7100 Configuration

Hi leon,
If VA7100 is connected to two HBA on host then you will find dual path for each LUNs you create and can be eliminated if secure path (SP) is installed. If you don't have the SP then choose the right path and create the LUN. Rest the steps to create filesystem is ok except
vgcreate /dev/vg03 /dev/dsk/cxtxdx /dev/dsk/cytxdx.

regds,
MP
Thayanidhi
Honored Contributor

Re: Urgent: About VA7100 Configuration

A physical drive on VA cannnot be seen by the host. The host can see only the LUNs. If you have dual hba/controllers you will see the LUns two times.
When creating VG specify both PV names, or you do a VGextend to configure the alternate PV path.

Regds
TT
Attitude (not aptitude) determines altitude.
Lester Dias
Advisor

Re: Urgent: About VA7100 Configuration

My understanding of secure path is that it is needed if HP-UX is connected to digital classic storage(HSG,HSV)where potentially four paths could be presented to each LUN. Without secure path, on a controller/path failover HP-UX would be unable to access the LUNs on the failed path.

If HP-UX is connected to HP classic storage(VA) then secure path is not needed as any path failovers would be handled by LVM providing primary and alternate paths are configured.
Leon Shen
Frequent Advisor

Re: Urgent: About VA7100 Configuration

Hi All,

Since the output was there. Is following the command correct and special for the pvecreate and vgcreate?


#ioscan -funC disk (scan Harddisk)
#pvcreate -f /dev/rdsk/c5t0d0
#mkdir /dev/vg03
#cd /dev/vg03
#mknod /dev/vg03/group c 64 0x030000
#vgcreate /dev/vg03 /dev/dsk/c5t0d0 /dev/dsk/c7t0d0
#lvcreate -L 10000 /dev/vg03/lvol1
#lvcreate -L 35000 /dev/vg03/lvol2
#newfs -F vxfs /dev/vg03/rlvol1
#newfs -F vxfs /dev/vg03/rlvol2
After mount the file systems accordingly.


Hope can clearify that.

Best regards
Leon