topic Re: mounting the snapshot of a vdisk in EVA in HPUX. in HPE EVA Storage

mounting the snapshot of a vdisk in EVA in HPUX.

Darren Poh_1 — Fri, 10 Feb 2006 10:56:38 GMT

What is the correct method of mounting of the snapshot of the vdisk in a EVA for host HPUX? Please advice. Thank you.

Re: mounting the snapshot of a vdisk in EVA in HPUX.

Cem Tugrul — Mon, 13 Feb 2006 08:19:28 GMT

Darren,
after creating snapshot you have to present
it
After presenting it to hp-ux host then
go hp-unix host then run ioscan -fnCdisk
and try to see this snap lun on hp then
if you wish go vgcreate-lvol-fs then mount

Good Luck,

Re: mounting the snapshot of a vdisk in EVA in HPUX.

krusty — Mon, 13 Feb 2006 17:05:45 GMT

Darren,

I more thing on the snapshot. If it is from the same host, you will need to issue the "vgchgid" command to modify the VGID on the raw devices. LVM cannot handles seeing the same VGID on the same host.

Here is a overview with some examples:

After snapping the LUN,

1) Change the VGID
vgchgid /dev/rdsk/c5t0d7

2) Create a new volume group:
mkdir /dev/vgsnap
mknod /dev/vgsnap/group c 64 0x020000

3) Import the snap disks into the new volume group.
vgimport /dev/vgsnap /dev/dsk/c5t0d7

4) Activate the new volume group.
vgchange -a y /dev/vgsnap

5) Mount the associated LVols.
mkdir /snap/lvol1
mount /dev/vgsnap/lvol1 /snap/lvol1

HTH,

Curt

Re: mounting the snapshot of a vdisk in EVA in HPUX.

Cem Tugrul — Tue, 14 Feb 2006 02:05:48 GMT

Darren,
Curt is right...At once i wanted to be fast
but forgot the important step vgchgid...
i have just checked my snap scripts so my steps like;

1- mkdir /dev/vgsnapname

2- mknod /dev/vgsnapname/group c 64 0xNn0000

3- vgchgid /dev/rdsk/vgsnap_dev_file

4- vgchange -c n vgsnapname

5- vgchange -a y vgsnapname

6- fsck -F vxfs /dev/vgsnap/lvol1

7- mount -F vxfs /dev/vgsnap/lvol1 /mount_point_dir

The steps above are embeded in a script
and running everyday for me to take my critical system's SNAP and mount files to my
another test system.

Good Luck,

Re: mounting the snapshot of a vdisk in EVA in HPUX.

Tom O'Toole — Tue, 14 Feb 2006 12:33:51 GMT

Does anyone here happen to know the proper steps to do this same thing under IBM AIX?

Re: mounting the snapshot of a vdisk in EVA in HPUX.

Nguyen Anh Tien — Tue, 14 Feb 2006 21:25:03 GMT

I think Cem Tugrul forgot one step:
3) Import the snap disks into the new volume group.
vgimport /dev/vgsnap /dev/dsk/c5t0d7
Without this, vgsnap do not know how to change it to active, it can not determine which PV it has!
HTH
tienna

Re: mounting the snapshot of a vdisk in EVA in HPUX.

Tarasevich Pavel — Thu, 01 Feb 2007 02:09:03 GMT

Sam, thank you. I make mount.

Re: mounting the snapshot of a vdisk in EVA in HPUX.

Rath Kum — Sun, 08 Nov 2009 17:02:18 GMT

I have mounted the Vdisk (EVA8K)and put some data and took the snap and presented to another linux host .
Can anyone have same steps on RHEL5.x ?
Your help will be greatly appreciated

Thanks