(B15) Virtualization part2 -Storage Virtualization, VHD, VHDX, VMDK, QCOW2, VIRT DISK TYPES
20220325 164548
Timestamps:
00:00 Storage Virtualization
11:10 Virtual Hard disk formats
19:10 Fixed Disk and Dynamically expanding disk
54:10 Differencing -parent and child disk
01:03:40 Snapshot
01:31:00 Summary
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Storage Virtualization
We storage data in
Hard disk,SCSI Disks,SSD
DAT/DDS -- store Backup, CC Camera
CDROM/DVD/BLUERAY
PenDrive
SD Cards, EMMC
Virtual Storage:
Virtual Disk
NAS ans SAN
VSAN
RAID , LVM and Storage Space
iSCSI VirtualHardDisk
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Virtual Hard Disk
-store data in virtual harddisk like normal hard disk
-attach/dettach virtual hard disk
-attach virtual hard disk to virtual machines
Formats
Microsoft:
.vhd -virtual hard disk
.vhdx
VMWare -Workstation/vSphere
.vmdk - virtual machine disk
Linux -Qemu/KVM
.qcow2 -Qemu copy on write
Oracle VM VirtualBox
.vdi -VirtualBOX Disk Image
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.VHD -Disk Size - supprt upto 2TB
.VHDX -Disk Size - support more than 2TB and upto 64TB
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Fixed Disk
The virtual hard disk file is allocated to maximum
size when the virtual hard disk is created
Dynamically Expanding
The Virtual hard disk file grows to tirs maximum
size as data is written to the virtual hard disk
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Differencing Disk
-create a child disk on parent disk(referance disk)
-data in parent disk shows in child disk
-can create multiple child disk on same parent disk
-change in a child disk data does not effect on
the other child disk and parent disk
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Snapshot/checkpoint on a data or on Virtual Machine
take snapshot on virtual machine
any change ours or issues - we can revert it back to previous stage
hard disk of VM before snapshot is parent
working hard disk after snapshot is child
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CD/DVD -- .iso image
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