Memory Options. Allied Telesis AT-X900-24XS, AT-FAN03, AT x900-48FS, AT-9924Ts, AT-8948

Hardware Reference 25

Memory Options

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The following memory expansion options are available:

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CompactFlash Card

Secure Digital (SD) Card

Dual In-line Memory Module (DIMM)

CompactFlash Card

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CompactFlash (CFlash) cards are a memory expansion option for the following switches running the AlliedWare operating system:

■ AT-8948 x900-48FE x900-48FS

AT-9924T

AT-9924SP

Data such as releases, patches, and configurations can be stored on these cards, and files can be manipulated with the command line interface (CLI). However, release and patch files cannot be run directly from the card, but must be loaded into either NVS or on-board flash.

Important Anyone with a compliant reader can read CFlash cards so do not keep sensitive data on them.

Approved

CFlash card

The CompactFlash card approved for the x900-48FE, x900-48FS, and AT-9900 series switches is AT-CF128A-00 128 MBytes. Other cards are unlikely to work with the switch.

Inserting and removing a

CFlash card

You can insert the card into the CompactFlash slot at any time; it takes about two seconds to initialise. The following CLI message confirms that the card has been inserted:

Info (1106257): Compact flash card inserted.

The following message confirms that the card is ready to use:

Info (1106268): Compact flash card initialisation successful.

The following message means that the CFlash card is not compatible with the switch:

Info (3106300): Compact flash card initialisation unsuccessful.

Important When data is being written to or read from the card, the CF LED on the front panel of the switch is green. Do not remove the card when it is active or you will corrupt the data. Wait until the LED is off before ejecting the card.

Displaying data about a CFlash card

To display information about a CompactFlash card, including card size, file count, and serial number, insert the card and enter the command: show cflash

To display cluster ranges on a card, insert the card and enter the command: show cflash test

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The following figure is an example of output from the show cflash test command when no test is running.

Clusters available for testing

Ranges:

[42645--61944]

Number of free clusters = 19300

Number of ranges = 1

Number of used clusters = 42645

Testing a CFlash card

It is important to fully test the hardware interface of the switch to the CFlash card. This test consists of reading vendor information and reading and writing to every part of the card.

To test the card, insert it in the CF slot and enter the command: enable cflash test start=startnumber end=endnumber where startnumber and endnumber are positive integers within a cluster range.

The end number must be higher than the start number. Cluster ranges are displayed in the output of the show cflash test command.

The test software reads the file allocation table and displays a list of free sectors. Sectors can be tested as single sectors or as a range. The test consists of a write/read/verify cycle.

To stop the test, use the disable cflash test command. To display test results while a test is in process, enter the show cflash test command. Also, use this command when testing is not active to display the blank clusters range on the card.

The following is example output from the show cflash test command when a test is running.

Test Progress

Starting cluster = 700

Ending cluster = 1700

Current cluster = 1185

Passed clusters number = 485

Passed sectors number = 1940

Failed clusters number = 0

Failed sectors number = 0

Used Clusters encountered = 0

Duration................ 4417 ms

Error messages are displayed when a file write fails. Failure could be because of the card being removed or an error in the card itself. For more information about these test commands and others for CFlash, see the Managing the File

System chapter in the AlliedWare

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Operating System Software Reference.

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