ATTO Technology Diamond Storage Array S-Class Instruções de Operação descarregar pdf (Página 30)

ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual

5.1 In-band CLI Over the Fibre Channel

In-band Command Line Interface (CLI) configures and manages the Diamond Storage Array using

SCSI-based CLI commands over a Fibre Channel port connection.

In-band CLI allows a programmer to configure

the Diamond Storage Array while it is moving

data. Using a programmer’s interface, CLI

commands as described previously in this manual

may be implemented.

In-band CLI is implemented as part of LUN 0. It

uses a different LUN than the array, and reports as

a Storage Enclosure Services (SES) device

(device type 0x0D).

LUN 0 is visible on all Fibre ports but is actually

a single unit. The default value for LUN 0 is 0x00.

LUN 0 must be reserved for each Write

Buffer/Read Buffer pair, using the SCSI Reserve

command to insure integrity of the in-band CLI

session.

1 An initiator (host) sends a SCSI Reserve

command to LUN 0.

• If LUN 0 is not reserved by another initiator,

LUN 0 is now reserved and ready to begin a

new CLI session.

• If the array configuration is reserved by a

different CLI session (i.e. serial or Telnet),

the in-band session will not be allowed to

modify the array configuration. If you try, the

results buffer of LUN 0 will return

Process X has the configuration

reserved.

ID of this session = Y

Ready.

2 The initiator issues a SCSI Write Buffer

command to LUN 0. A

Write Buffer

command

must be accompanied by an ASCII buffer

representing the CLI command string such as

set DiamondName Omega1

3 LUN 0 will execute the command line and

create feedback in the form of ASCII characters

into a buffer. This buffer is 8 KB and circular.

Retrieve the results by issuing a Read Buffer

command before issuing another Write Buffer

command.

4 A subsequent Write Buffer command will

execute the new command line and overwrite

the previous results in the buffer with new

results.

5 LUN 0 can be released by issuing a SCSI

Release command to the LUN after each

Write/Read Buffer

pair, or multiple

Write/Read

Buffer pairs.

I/O details

The buffer sent to the Services LUN during the

data out phase of a Write Buffer command must

• ASCII data

• maximum 80 bytes length

• terminated with either a carriage return

character (0x0D), line feed character (0x0A) or

NULL character (0x00)

• Characters following the first carriage return

character, line feed character or NULL character

are ignored.

The buffer retrieved from the Services LUN

during the data-in phase of a Read Buffer

command will be

• ASCII data

• 8 KBytes (8192 bytes) in length

• terminated with a NULL character (0x00)

• Characters following the NULL character are

meaningless.

Initiator (Host) Diamond Array

Reserve LUN 0 return: “ok”

Write Buffer

LUN 0

bid ‘AA’

“get Temperature”

executes the CLI command,

stores output in buffer

Read Buffer

LUN 0

bid ‘AA’

return:

”Temperature=28C\r\n\Ready

.\r\n\0”

Release LUN 0 return: “ok”

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