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Clarion Quiz Questions
Joe Hoey's Questions in Class 6/20
9
Computer Science
Professional
06/22/2006

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Term
Clarion Messaging Interface

CMI is the link between the storage processors (SP-A and SP-B).It’s a fiber channel link. It controls how much cache is used by each SP.
Definition
What is the CMI and how does it work?
Term
It is a cache level threshold on average of 50-60 percent that causes to increase cpu priority to destage data from cache to disk.
Definition
Explain watermarks.
Term
000, 001, 002, 003, 004
Definition
What is the disk address of the vault drives?
Term
5 Vault Drives

First 5 Disks

0 1 2 3 4

6Gb a piece

30GB Total
Definition
Vault Drives on the Clarion, How many are there? Where are they Located? and How are they numbered on the array?
Term
Persistent Storage Manager located on the vault, and it's tripled mirrored on the vault. It's on the first 4 physical disks. It's created by the Navisphere.
Definition
Where is the PSM and where is it located?

Protection of the PSM?

And extra Info
Term
SP-A Write
SP-B Write
Read
Base/Flair

Size is 4x the write cache of the read cache.
Definition
Describe the allocation of a Clarion's cache, and it's size
Term
CX700 & CX500
Storage Processor Enclosure (SPE)
Disk Array Enclosure (DAE)
Storage Power Supply (SPS) (1U Size)
Definition
What types of enclosures does a CX700 and CX500 have?
Term
512 Bytes

8 bytes for Meta Data Information TimeStamp)

equals t0: 520bytes
Definition
Explain the way data blocks are written to disk?
Term
CX300/CX500:
BackEnd:
FrontEnd:

CX700:
BackEnd:
FrontEnd:
Definition
How many backend & front-end ports do a CX300, CX500, CX700 have?
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