Displaying And Maintaining The Nand Flash Memory - HP 5120 series Configuration Manual

To do...
Restore the space of a storage
medium
Format a storage medium
CAUTION:
• When you format a storage medium, all the files stored on it are erased and cannot be restored. If a
startup configuration file exists on the storage medium, formatting the storage medium results in loss of
the startup configuration file.
You can execute the fixdisk command for the storage medium on the master, but you cannot execute the
•
command for a storage medium on the slave.

Displaying and maintaining the NAND flash memory

The physical space of the NAND flash memory is divided into multiple blocks, each of which is
subdivided into multiple pages. The NAND flash memory is erased on a block basis and read on a page
basis; the memory spaces are allocated on a page basis.
Displaying and repairing bad blocks
Bad block ratio varies with products of different vendors. The frequently used area of the memory goes
bad easily. Bad blocks cannot be used to store data, and the system has to skip the bad blocks when it
allocates storage spaces to files. You can get the locations of bad blocks and repair them at the
command line interface.
Follow these steps to display and repair bad blocks:
To do...
Display the number and location of
bad blocks in the NAND flash
memory
Repair bad blocks
Checking files
After files are written to the NAND flash memory, use the following commands together to check the
content of these files.
Follow these steps to check files:
To do...
Display the space distribution of
the specified file in the NAND
flash memory
Use the command...
fixdisk device
format device
Use the command...
display nandflash
badblock-location [ | { begin |
exclude | include }
regular-expression ]
fixdisk device
Use the command...
display nandflash file-location
filename [ | { begin | exclude |
include } regular-expression ]
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Remarks
Optional
Available in user view
Optional
Available in user view
Remarks
Required
Available in any view
Required
Available in user view
Remarks
Available in any view