Technical data

Managing Router Files
117347-A Rev. A 5-25
Partitioning Media on AN, ANH, and ASN Routers
The AN, ANH, and ASN routers use a single flash file system; that is, the routers
have only one medium where the file system resides. The NVFS for the AN
resides on a flash SIMM; the BayStack AN, ANH, and ASN use a flash memory
card. If the single flash file system fails, the router has no backup file system from
which to boot.
Site Manager allows you to partition the flash media on these routers. You can
partition file systems on 4 MB, 8 MB, and 16 MB media only.
Partitioning the file system divides it into two independent volumes of equal size.
You can store default boot images and configuration files on each volume for
redundancy. Then, if the router is unable to boot from the primary file system, it
automatically attempts to boot from the secondary (backup) file system.
For example, suppose the file system for your AN resides on a 4 MB SIMM.
Partitioning the file system creates two 2 MB volumes. The volumes function
independently, and you reference them with unique slot and volume identifiers.
You could then copy the files from the primary volume to the secondary volume.
You can stack ASNs and use more than one flash memory card in the stack to
achieve file system redundancy. In this case, partitioning would not be necessary.
The next two sections explain how to create a partition and how to delete one.