Veritas has re-branded it’s “Storage Foundation and High Availability” family products and now, from version 7 all the of the Veritas products under this category comes with a brand name of “Infoscale“. In this tutorial, we are going to teach how to create a Veritas Volume Manager (VxVM) volume and then how to create a VxFS filesystem and mount it in Red Hat Enterprise Linux 7 (RHEL 7).
This will be a basic VxVM tutorial with easy to understand steps. For better understanding perform this live on your test environment for learning.
1. Red Hat Enterprise Linux 7 (RHEL 7) or CentOS 7.
2. Infoscale Foundation (VxVM + VxFS).
3. Knowledge of Linux Operating System.
Creating Veritas Volume Manager (VxVM) Volume & Filesystem in RHEL 7
1. First of all, check the disks which are visible to Veritas Volume Manager (VxVM) and this can be done by “vxdisk” command as below.
# vxdisk -o alldgs list
[root@server ~]# vxdisk -o alldgs list DEVICE TYPE DISK GROUP STATUS emc_d1 auto:none - - online invalid emc_d2 auto:none - - online invalid emc_d3 auto:none - - online invalid emc_d4 auto:none - - online invalid
2. Once the disks are visible to the VxVM, initialize the disk which are not under VxVM control, i.e. showing “Online Invalid” status.
# vxdisksetup -i emc_d2
[root@server ~]# vxdisksetup -i emc_d2 [root@server ~]# vxdisk -o alldgs list |grep -i emc_d2 emc_d2 auto:cdsdisk - - online [root@server ~]#
By default CDSDISK (Cross-Platform Data Sharing Disk) type is used and can be changed as per requirement.
Once the disk is initialized and is under control of VxVm, we can create a Disk Group (DG). Here we are using a single disk to create a DG and a Volume. No complex layouts in this tutorial like Stripe, Mirror, Mirror-Concat, etc.
3. To create a disk group (DG) with one disk use below command.
# vxdg init testdg testdg01=emc_d2
[root@server ~]# vxdg init testdg testdg01=emc_d2 [root@server ~]# [root@server ~]# vxdg list NAME STATE ID testdg enabled,cds 1482590455.40.server [root@server ~]#
testdg01 is a logical name called DM name (Disk media name). If the DM name is not given while creating the disk group, then by default disk name will be used.
4. Once DG is created with one disk, create a volume as below.
# vxassist -g testdg make testvol 100m
The above command will create a volume with the name “testvol” having size 100 MB.
Mounting VxFS Filesystem in Red Hat Enterprise 7 (RHEL 7)
5. Now, once the volume is created, format it as a VxFS filesystem using the below command.
# mkfs -t vxfs /dev/vx/rdsk/testdg/testvol
[root@server ~]# mkfs -t vxfs /dev/vx/rdsk/testdg/testvol version 11 layout 204800 sectors, 102400 blocks of size 1024, log size 1024 blocks rcq size 1024 blocks largefiles supported maxlink supported
Note: /dev/vx/rdsk/testdg/testvol is a character or RAW device and for mounting we don’t use it. For mounting purpose block device is used.
6. Now create a directory to mount the filesystem.
# mkdir /data # mount -t vxfs /dev/vx/dsk/testdg/testvol /data # df -h /data [To verify]
[root@server ~]# mkdir /data [root@server ~]# mount -t vxfs /dev/vx/dsk/testdg/testvol /data [root@server ~]# df -hP /data Filesystem Size Used Avail Use% Mounted on /dev/vx/dsk/testdg/testvol 100M 3.2M 91M 4% /data [root@server ~]#
Now your VxFS filesystem is mounted and you can start using it. If you want to mount it permanently put an entry in “/etc/fstab” file like any other filesystem.
Tip: Use Veritas™ Services and Operations Readiness Tools (SORT) to check version compatibility. It is a web-based tools that optimizes the end to end experience for Veritas products.
This tutorial is just a basic and first in our Veritas Volume Manager (VxVM) tutorial series, we will also cover other simple and advance tutorials, so do subscribe to our blog and get alerts for FREE whenever a new article is published.
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