Follow Us

We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message

How to partition internal Flash memory on Cisco routers

Enabling one router to maintain two or more software images.

Article comments

On most class B Flash file systems, you can partition banks of Flash memory into separate, logical devices so that the router can hold and maintain two or more different software images.

This partitioning allows you to write software into Flash memory while running software in another bank of Flash memory. To partition Flash memory, you must have at least two banks of Flash memory. A bank is a set of four chips.

This requirement includes systems that support a single SIMM that has two banks of Flash memory. The minimum partition size is the size of a bank.

This command is an example of how to partition Flash memory:

Router(config)#partition flash partitions [size1 size2]

This following command is for Cisco 1600 and 3600 series routers:

Router(config)#partition flash-filesystem: [number-of-partitions][partition-size]

This task succeeds only if the system has at least two banks of Flash, and the partitioning does not cause an existing file in Flash memory to be split across the partitions.

For all platforms except the Cisco 1600 series and 3600 series routers, Flash memory can only be partitioned into two partitions.

For the Cisco 1600 and 3600 series routers, the number of partitions that you can create in a Flash memory device equals the number of banks in the device.

Issue the show flash-filesystem: all command to view the number of banks on the Flash memory device. The number of partition size entries you set must be equal to the number of specified partitions.

For example, the partition slot0: 2 8 8 command configures two partitions to be 8 MB in size each.

The first 8 corresponds to the first partition; the second 8 corresponds to the second partition.

For more information on how to partition Flash, refer to Cisco Router Memory Commands.


More from Techworld

More relevant IT news


Router memory said: good information but i have got a point to ask you that how can i use this in my lta hrefhttpwwwpc-wholesalecomgtrouter memoryltagt Routerconfigpartition flash partitions size1 size2

Send to a friend

Email this article to a friend or colleague:

PLEASE NOTE: Your name is used only to let the recipient know who sent the story, and in case of transmission error. Both your name and the recipient's name and address will not be used for any other purpose.

Techworld White Papers

Choose – and Choose Wisely – the Right MSP for Your SMB

End users need a technology partner that provides transparency, enables productivity, delivers...

Download Whitepaper

10 Effective Habits of Indispensable IT Departments

It’s no secret that responsibilities are growing while budgets continue to shrink. Download this...

Download Whitepaper

Gartner Magic Quadrant for Enterprise Information Archiving

Enterprise information archiving is contributing to organisational needs for e-discovery and...

Download Whitepaper

Advancing the state of virtualised backups

Dell Software’s vRanger is a veteran of the virtualisation specific backup market. It was the...

Download Whitepaper

Techworld UK - Technology - Business

Innovation, productivity, agility and profit

Watch this on demand webinar which explores IT innovation, managed print services and business agility.

Techworld Mobile Site

Access Techworld's content on the move

Get the latest news, product reviews and downloads on your mobile device with Techworld's mobile site.

Find out more...

From Wow to How : Making mobile and cloud work for you

On demand Biztech Briefing - Learn how to effectively deliver mobile work styles and cloud services together.

Watch now...

Site Map

* *