HSG60/HSG80 Virtual Disk rename

[Heens Filip]

Hi,

I've inherited a SAN with an HSG60-controller. Witch was not really good designed.

At the moment we have 8 Virtual disks D0-D7, as I've understood that's tha max that windows can access... But I need more Virtual disks.
I understand that I can use SET SERVER2 UNIT_OFFSET=10 to let the server start counting at D10 and sees the disk as D0.

Is there any way (or command) to rename a disk to a new name eg. D0 to D10? Or do I have to delete the disk, recreate the disk and restore 700Gb?

[Steven Clementi]

You can simply delete the unit and recreate it as a new unit. No restore necessary.

Assuming D1 uses R1...

delete d1
add unit d10 r1
set d10 enable_acc =

You only LOSE the data if you init or delete..

delete r1 OR
init r1


As long as you don't delete or init, your good to go. Just make sure you set your access.

I would have a backup, just in case.


Steven

[Uwe Zessin]

You could also upgrade your environment to a new software level, because 'windows' has had large LUN addressing for some years now.

[Heens Filip]

what do you mean by upgrading the environment?
The firmware on the controller or the windows version?
The firmware on the controller is the latest 8.7 ot 8.8 (don't know by hart...)
At the moment we're running Windows 2KSP4 on thoose server, but this weekend we're upgrading to Win2K3, so mayby my problems will be solved after the windows upgrade?

[Stephen Kebbell]

Hi,

if you are using a D0, that means you must have SCSI-2 mode enabled on your HSG60. This is what will restrict you to 8 LUNs per host. You could change to SCSI-3 mode on the storage, but that involves a fair bit of reconfiguring. You will need to delete D0 and move it to another Unit Number, in the way Steven has described. Then you can SET THIS SCSI_VERSION=SCSI-3. SCSI-3 mode reserves LUN 0 for a Command Console LUN. This requires a reboot of both HSG controllers. This will alter your disk config in Windows a bit - although Windows should still recognise the paritions and stuff, as Windows identifies its disks via their signature. But backup everything beforehand, just to be on the safe side.

Regards,
Stephen

[Heens Filip]

As a test i've created a devicegroup in Raid 5 DVGRPR3, I created a virtual disk D8, deleted the disk and tried to recreate the disk as d3
But I get the following error...
Error 1170: Partitions found on container, unit not created.

What am I missing?

following is a show of the devicegroup R3

HSG60> show dvgrpr3
Name Storageset Uses Used by
------------------------------------------------------------------------------

DVGRPR3 raidset DISK10000
DISK20000
DISK20100
DISK20200
Switches:
POLICY (for replacement) = BEST_PERFORMANCE
RECONSTRUCT (priority) = NORMAL
CHUNKSIZE = 256 blocks
State:
UNKNOWN -- State only available when configured as a unit
Size: 213291762 blocks
Partitions:
Partition number Size Starting Block Used by
---------------------------------------------------------------------
1 205078125 ( 105000.00 MB) 0
8213485 ( 4205.30 MB) 205078272
HSG60> add unit d3 dvgrpr3
Error 1170: Partitions found on container, unit not created.

thanks in advance for all your help, it's realy good having help this fast...

[Stephen Kebbell · Accepted solution]

It's a partitioned storage set. Weird - there is one partition of around 100GB, and then 4GB unused. Any reason for that?
Add the switch PARTITION=1 to the end of your command and it should create the unit.

Regards,
Stephen

[Heens Filip]

yep the reason is that is was from a previous test ;-) no other specific reason

[Heens Filip]

ok the partition=1 part did the trick.
Moving on to the testing ;-)

Thanks for all the help so far