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тАО08-10-2020 03:39 PM
тАО08-10-2020 03:39 PM
MSA1050 - Delete Disk Group
Hi,
I have a MSA 1050 with VE100R002 firmware configured as below:
- Pool A -> DiskGroup1 -> 4 x 300GB 10K SAS RAID5
- Pool A -> DiskGroup2 -> 3 x 300GB 10K SAS RAID5
- Global Spare -> 1 x 300GB 10K SAS
There are 4 LUNs exposed to the hosts.
I want to make a backup of the data and delete 3 LUNs, coming to occupy only 500GB. At this point, could I delete the DiskGroup2?
Do I risk losing the data on the remaining 500GB?
I would like to delete DiskGroup2 in order to recreate a new Virtual Disk Group with 9 disks in RAID5.
Thank you a lot
Paolo
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тАО08-10-2020 08:06 PM - last edited on тАО06-28-2021 09:18 PM by Ramya_Heera
тАО08-10-2020 08:06 PM - last edited on тАО06-28-2021 09:18 PM by Ramya_Heera
Re: MSA1050 - Delete Disk Group
First check how much space used or consumed by DiskGroup2. Also you need to check how much space is free for DiskGroup1 because when you delete DiskGroup2 then all data will migrate from DiskGroup2 to DiskGroup1. This process is called VDG drain. So run command "show disk-groups" to check how much shows as "Size" which is nothing but total size of the VDG and also see "Free" which is nothing but shows how much space free in that VDG. From that you can calculate how much is used or consumed.
Also keep in mind, for optimal performance:
All virtual disk groups (VDGs) in the same tier should have the same RAID level, capacity disks, and physical number of disks.
Hope this helps!
Regards
Subhajit
I am an HPE employee
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тАО08-12-2020 04:04 PM
тАО08-12-2020 04:04 PM
Re: MSA1050 - Delete Disk Group
Thanks for the reply.
With a total of 13 disks I cannot create VDGs with the same number of disks even if I use the same RAID level. I don't have the license that enables tiering.
How does MSA deal with two VDGs with the same RAID level but different number of disks?
For example: DiskGroup1 with 4 disks in RAID5 and DiskGroup2 with 9 disks in RAID5? Will DiskGroup2's IOPS levels be capped down to match DiskGroup1's performance?
Thank you