Руководство Пользователя для Lexmark X644e
Memory
6-8
By using s, administrators can ensure data integrity and proper authorization. If flash
memory is write protected, for example, users cannot delete existing files, format the
device, or download new files to the device (without first specifying the ). A specific
example might be a macro file of an authorizing signature that is stored on flash
memory with a Read/Write . This ensures that only those authorized can use the
signature. All other files (fonts, letterhead, macros) can be unprotected for general
use.
memory is write protected, for example, users cannot delete existing files, format the
device, or download new files to the device (without first specifying the ). A specific
example might be a macro file of an authorizing signature that is stored on flash
memory with a Read/Write . This ensures that only those authorized can use the
signature. All other files (fonts, letterhead, macros) can be unprotected for general
use.
s are set, declared, retracted, and deleted using the PJL commands or the MarkVision
Professional utility. See “Protecting a File or Device” on page 3-93.
Professional utility. See “Protecting a File or Device” on page 3-93.
Rewriting the Flash Content
Be aware that once a bit on the flash memory is turned from 1 (binary 1) to 0 (binary
0), it cannot be changed back to binary 1 without a complete flash memory format. As
PostScript emulation file operators write data to flash memory, the printer microcode
software verifies that none of the bits being set to binary 1 is binary 0. If any attempt
is made to change a 0 bit back to 1, a PostScript emulation ioerror occurs.
0), it cannot be changed back to binary 1 without a complete flash memory format. As
PostScript emulation file operators write data to flash memory, the printer microcode
software verifies that none of the bits being set to binary 1 is binary 0. If any attempt
is made to change a 0 bit back to 1, a PostScript emulation ioerror occurs.
When a device is formatted, all locations are set to binary 1. This is also the reason
descriptions and s can be set only once for files on flash memory.
descriptions and s can be set only once for files on flash memory.