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Re: MSA1000 running ESX3.01 - Need to Reconfigure from RAID ADG -> RAID10

 
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Alistair Nelson
Occasional Advisor

Re: MSA1000 running ESX3.01 - Need to Reconfigure from RAID ADG -> RAID10

I should also have reported the current disk config as requested by Uwe:

CLI-1> show disks
Disk List: (box,bay) (B:T:L) Size Speed Units
Enclosure 1: SCSI (0:06:00) PROLIANT 4L7I DB1.86
Disk101 (1,01) (0:00:00) 146.8GB 160 MB/s 0
Disk102 (1,02) (0:01:00) 146.8GB 160 MB/s 0
Disk103 (1,03) (0:02:00) 146.8GB 160 MB/s 0
Disk104 (1,04) (0:03:00) 146.8GB 160 MB/s 0
Disk105 (1,05) (0:04:00) 146.8GB 160 MB/s 0
Disk106 (1,06) (0:05:00) 146.8GB 160 MB/s 0
Disk107 (1,07) (0:08:00) 146.8GB 160 MB/s 0
Disk108 (1,08) (1:00:00) 146.8GB 160 MB/s 0

Notes:
The speed is the currently negotiated speed to the disk. This may
be less than the maximum speed supported by the device due to bus
faults, loss of signal integrity, etc.

CLI-1> show units

Unit 0:
In PDLA mode, Unit 0 is Lun 1; In VSA mode, Unit 0 is Lun 0.
Unit Identifier :
Device Identifier : 60060B00-00849540-A1F3DED7-51930003
Preferred Path : Controller 2 (other controller)
Cache Status : Enabled
Max Boot Partition: Disabled
Volume Status : VOLUME EXPANDING (45% complete) - by other controller
Parity Init Status: 0% complete
8 Data Disk(s) used by lun 0:
Disk101: Box 1, Bay 01, (B:T:L 0:00:00)
Disk102: Box 1, Bay 02, (B:T:L 0:01:00)
Disk103: Box 1, Bay 03, (B:T:L 0:02:00)
Disk104: Box 1, Bay 04, (B:T:L 0:03:00)
Disk105: Box 1, Bay 05, (B:T:L 0:04:00)
Disk106: Box 1, Bay 06, (B:T:L 0:05:00)
Disk107: Box 1, Bay 07, (B:T:L 0:08:00)
Disk108: Box 1, Bay 08, (B:T:L 1:00:00)
Spare Disk(s) used by lun 0:
No spare drive is designated.
Logical Volume Raid Level: ADVANCED DATA GUARD (RAID 6)
stripe_size=16kB
Logical Volume Capacity : 700,069MB
Uwe Zessin
Honored Contributor

Re: MSA1000 running ESX3.01 - Need to Reconfigure from RAID ADG -> RAID10

I am afraid, that there won't be enough space even after the disk drive array expansion has finished:

The original was made from 7 x 146GB disk drives giving 1.022GB space. After adding the 8th disk drive, you should have a total capacity of 8x146GB = 1.168GB.

The logical volume has about 700GB. Twice the amount is needed for RAID10: about 1.400GB. So you are still short of about 2 disk drives. Sorry, but that is why I was asking for the numbers before telling you how to expand a disk drive array.

> How much space is required,
> my VM's are using only about 60% of the space

That does not matter, sorry. The MSA1000 serves pure data blocks and does not know what a file system is.


Oh by the way: be careful not to confuse the EXPAND command with the EXTEND command. The second one will increase the size of a logical disk, definitely not what you want now!
.
Alistair Nelson
Occasional Advisor

Re: MSA1000 running ESX3.01 - Need to Reconfigure from RAID ADG -> RAID10

Uwe,

Thanks for the information. Again Uwe this is very helpful. Of the existing 700GB array, I actually have about 270GB free in vmware filesystem. IE only 430GB is being utilised.

So I need to either add disks or

1) Shrink vmware filesystem (assuming possible)
2) Shrink logical volume (assuming possible)
?
Uwe Zessin
Honored Contributor
Solution

Re: MSA1000 running ESX3.01 - Need to Reconfigure from RAID ADG -> RAID10

You can't shrink a VMFS with data in-place.
Nor can you shrink a SmartArray logical disk.

You would have to backup your data (a great time to execise you backup plan, no?), then I would wipe the VMFS with the VI client and maybe zap the MBR to make sure nothing is left, delete the logical disk, recreate the logical disk, recreate the VMFS and restore the data.

Honestly, I am not sure if two more disk drives are sufficient, because I have not taken any controller meta-data into account (I simply don't have information how to do so, sorry).

And I don't remember if the MSA1000 firmware consistently displays "hardware GigaBytes" or if, for example, the logical disk size is show in "software GigaBytes". In that case, you would need a little more than 10 disk drives:

700.069*1.024*1.024*1.024*2/146.8 = 10.24
.
Alistair Nelson
Occasional Advisor

Re: MSA1000 running ESX3.01 - Need to Reconfigure from RAID ADG -> RAID10

This is now entering into a VMware rather than HP issue. I have image backups of all my VM's but this would mean I'd have to recreate all the VM's and VM disks.

Or see if I can just copy the VM disks and metadata? from the SAN to temporary storage.

We have 2 extra disks on the way soon anyway. That would be an option. But it sounds like 4 disks might be needed :(
Uwe Zessin
Honored Contributor

Re: MSA1000 running ESX3.01 - Need to Reconfigure from RAID ADG -> RAID10

> Or see if I can just copy the VM disks and metadata?

Yes, absolutely! That's one of the great things with virtual machines.

I have done it the opposite way just a few days ago:
have a server with local storage and needed to replace the disks with larger ones. So I have connected a Fibre Channel storage array to the VMware ESX server, created a VMFS on it and moved all files over. Replaced the disks on the local storage, re-created the local VMFS and then copied all files back.

On another occasion I had moved two VMFSes between two attached storage arrays, just by "dd"ing the raw disk - that worked because the block sizes were the same and I "dd"ed in the right direction ;-)
.
Alistair Nelson
Occasional Advisor

Re: MSA1000 running ESX3.01 - Need to Reconfigure from RAID ADG -> RAID10

Uwe,

Thankyou, I backed up the data, recreated the LUN and VMFS, and all is ok now.