Module 6: Storage Lesson: 2 IP Storage: iSCSI and NAS/NFS Flashcards
(31 cards)
What two types of IP storage do hosts support?
iSCSI and NAS
What types of network can iSCSI and NAS run over?
1Gbps and 10 Gbps Ethernet
What does an ESX host support booting from?
An independent hardware iSCSI adapter only
What does an ESXi host support booting from?
A dependent hardware iSCSI adapter
What must the ESXi hardware iSCSI adapter support in order to communicate parameters about the iSCSI boot device to an operating system?
iSCSI Boot Firmware Table (iBFT)
What two types of iSCSI initiators can be configured on the host?
Hardware -based (iSCSI HBA) or software-based (iSCSI software adapter
What does the iSCSI initiator do?
Transmits SCSI commands over the IP network
How does iSCSI initiator work?
It finds one or more targets, the target presents a LUN to the initiator, the initiator sends it SCSI commands
_____ _____ is also available in iSCSI
LUN Masking is also available in iSCSI
What two formats can an iSCSI name be in?
iSCSI qualified name (IQN) or the extended unique identifier (EUI)
The IQN can be up to ______ characters long.
The IQN can be up to 255 characters long.
What does the IQN naming convention?
The prefix (iqn), a date code specifying the year and month in with the organization registered the name used in as the naming authority string, the organiztional naming authority string which consists of a revered domain name, a colon (:) followed by a custom string.
What is the EUI naming convention?
The prefix (eui) followed by a 16-character name
What does the EUI 16 character name consist of?
24 bits for a company name assigned by the IEEE and 40 bits for a unique ID
What kind of port is created to be used by the host to access iSCSI storage?
VMkernel port
What must be done in order to provide access from the host to iSCSI storage?
Software iSCSI initiator
What name will be used for the iSCSI device?
The default iSCSI name that follows the IQN naming convention is chosen for you
What does CHAP do for the iSCSI initiator?
Verifies the legitimacy of the initiators that access targets on the network
What two iSCSI target discovery methods supported on hosts?
Static Discovery and Dynamic discovery
The host supports what two types of CHAP authentication methods?
Unidirectional and Bidirectional
How does CHAP work?
It uses a three-way handshake algorithm to verify the identity of your host and target.
ESX/ESXi supports how many NFS volumes?
Up to 64
What are the four CHAP parameters?
Do not use CHAP
Do not use CHAP unless required by the target
Use CHAP unless prohibited by the target
Use CHAP
What type of port is a NFS server accessed from the host by?
VMkernel
