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06-14-2005 01:43 AM
06-14-2005 01:43 AM
EMC lun size increase
I've extended the size of an EMC lun, but am having dificulty getting HPUX to see the change. I'm using LVM. I know that the kernel grabs the size of a disk, and keeps it. What I don't know is how to get the kernel to drop it so that it can see the new size. I'm fairly sure that I've seen this in the past and a good old fashioned reboot sorted it out, but I can't reboot this machine.
Any ideas?
Sime.
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06-14-2005 01:48 AM
06-14-2005 01:48 AM
Re: EMC lun size increase
The easier method is to create a new LUN to add to a VG.
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06-14-2005 01:54 AM
06-14-2005 01:54 AM
Re: EMC lun size increase
The lun I'm creating is for a service guard cluster. On one machine it shows the correct size, but on the other it shows the wrong size. I did origanialy create the lun at 22GB, then increased it to 90GB. The box that I'm having trouble with is telling me that the lun is 22GB (the original size.)
At the moment I'm not actually using LVM, I'm just presenting the LUN and using the following commands: -
ioscan -fnC disk
insf -eC disk
ioscan -fnC disk
diskinfo /dev/rdsk/cxtxdx
This tells me that the size is 22GB
Any ideas?
Sime.
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06-14-2005 01:56 AM
06-14-2005 01:56 AM
Re: EMC lun size increase
Now run diskinfo on that.
Anil
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06-14-2005 02:11 AM
06-14-2005 02:11 AM
Re: EMC lun size increase
I've got one lun presented via dual paths to 2 machines
This is the same lun presented to both hosts:-
Machine A
# diskinfo /dev/rdsk/c10t7d0
SCSI describe of /dev/rdsk/c10t7d0:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 95278080 Kbytes
bytes per sector: 512
# diskinfo /dev/rdsk/c6t2d4
SCSI describe of /dev/rdsk/c6t2d4:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 95278080 Kbytes
bytes per sector: 512
# rmsf /dev/dsk/c10t7d0 /dev/rdsk/c10t7d0 /dev/dsk/c6t2d4 /dev/rdsk/c6t2d4
# rmsf -H 0/12/0/0.1.31.0.0.7.0
# rmsf -H 0/10/0/0.1.27.0.0.2.4
# ioscan -fnC disk
# insf -eC disk
# diskinfo /dev/rdsk/c10t7d0
SCSI describe of /dev/rdsk/c10t7d0:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 95278080 Kbytes
bytes per sector: 512
# diskinfo /dev/rdsk/c6t2d4
SCSI describe of /dev/rdsk/c6t2d4:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 95278080 Kbytes
bytes per sector: 512
---------------------------------------------
Machine B
# diskinfo /dev/rdsk/c14t7d0
SCSI describe of /dev/rdsk/c14t7d0:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 23819520 Kbytes
bytes per sector: 512
# diskinfo /dev/rdsk/c17t2d4
SCSI describe of /dev/rdsk/c17t2d4:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 23819520 Kbytes
bytes per sector: 512
# rmsf /dev/dsk/c14t7d0 /dev/rdsk/c14t7d0 /dev/dsk/c17t2d4 /dev/rdsk/c17t2d4
# rmsf -H 0/4/0/0.1.31.0.0.7.0
# rmsf -H 1/10/0/0.1.27.0.0.2.4
# ioscan -fnC disk
# insf -eC disk
# diskinfo /dev/rdsk/c14t7d0
SCSI describe of /dev/rdsk/c14t7d0:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 23819520 Kbytes
bytes per sector: 512
# diskinfo /dev/rdsk/c17t2d4
SCSI describe of /dev/rdsk/c17t2d4:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 23819520 Kbytes
bytes per sector: 512
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06-14-2005 03:54 AM
06-14-2005 03:54 AM
Re: EMC lun size increase
Are you sure you are pointing to the same LUN you are talking about.
Can you post the "ioscan -kfnC disk" output from both the machines.
Regards
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06-14-2005 08:53 PM
06-14-2005 08:53 PM
Re: EMC lun size increase
Thanks for all the help.
Sime.