2/14: Storage Infrastructure Flashcards
True or False? VMFS5 supports in place upgrades to VMFS6?
False - VMFS5 cannot be upgraded to VMFS6 - you must complete a storage migration.
NOTE: VMFS3 can be upgraded to VMFS5, but VMFS5 cannot be upgraded to VMFS6
VMFS6 implementation of 4Kn vs the legacy 512n makes upgrades impossible!
What is the maximum single LUN or total of multiple extents supported with VMFS5 and VMFS6?
64TB
1 x 64TB LUN (1 extent)
or
2 x 32TB LUNs (2 extents)
What is the largest single virtual disk size supported on VMFS5 and VMFS6?
62TB
What is the maximum number of VMFS v6 datastores per host?
1,024
1,024 is ONLY supported with a cluster of 32 hosts or less
What is the maximum number of paths to a VMFS v6 datastore?
4,096
What is the recommended best practices for the maximum number of paths to a Datastore?
4
What happens when a VMFS v3 datastore is mounted within a vSphere 7 infrastructure?
VMFS3 datastores are upgraded to VMFS5
vSphere 7 (or v6.7) does NOT support VMFS3 datastores - only VMFS5 and VMFS6
What is the use case for the High-Performance Multipathing Plug-in (HPP)?
The HPP is designed and leveraged for use with NVMe storage devices
What are the filenames for snapshots leverages SEsparse and VMFSsparse?
SEsparse leverages “SEsparse” within the filename
VMFSsparse leverages “delta” within the filename
How is space efficiency achieved with the newer SEsparse (space efficient sparse) snapshot delta file type?
Space reclamation enables the delta file to shrink in size when write changes are deleted or purged
SEsparse is the default snapshot delta file type with VMFS6 - VMFSsparse is NO longer leveraged
True or False?
VMFS6 leverages both the legacy VMFSsparse and newer SEsparse (space efficient) snapshot delta file types.
False
VMFS6 only leverages the newer SEsparse (space efficient) snapshot delta file type
VMFS5 leverages SEsparse for virtual disks >2TB
VMFS5 leverages VMFSsparse for virtual disks <2TB
What are the size of the two allocation sizes leveraged with VMFS6 for small and large files?
Small File Blocks - 1MB
Large File Blocks - 512MB
Small file blocks are leveaged with thin provisioning and large file blocks are leveraged with thick provisioning.
These are VMFS allocation algorithms - not actual file system blocks.
What are the two primary new feature capabilities with VMFS6?
Faster file creation time
(via leveraging the new small and big file blocks)
Parallel disk operations and concurrent transactions
(via improvements with atomic lock handling)
What are the three industry available storage device sector formats available today?
Sector Format - Logical Sector Size - Physical Sector Size
512n (native) - 512 bytes - 512 bytes
512e (emulated) - 512 bytes - 4,096 bytes
4Kn (native) - 4,096 bytes - 4,096 bytes
True or False? VMFS6 supports 4Kn on local SAS and SATA HDDs?
True
VMFS6 supports 4Kn HDDs, but does NOT support 4Kn SSDs, NVMe, or RDM devices
True or False? VMFS6 supports 4Kn with the Native Multipathing Plug-In (NMP) and the High-Performance Plug-In (HPP)?
False
VMFS6 only supports 4Kn with the Native Multipathing Plug-In (NMP)
VMFS6 does NOT support 4Kn with the High-Performance Plug-In (HPP)
VMFS6 does NOT support 4Kn with third-party multipathing plug-ins