Intel SR1520ML manual Using the iBMC Boot Block Write Protect Jumper J1A4

Using the iBMC Boot Block Write Protect Jumper (J1A4)

The iBMC boot block write protect jumper (J1A4) is protection for the boot block portion of the iBMC firmware. The default position of the jumper is covering pins 1-2. This protects the boot block from being written to during an iBMC firmware update. In most cases there is no need to update the boot block. Most update utilities are not built with the authority to access this section of code.

In the unlikely event that the boot block must be written to, the J1A4 jumper must be moved to cover pins 2-3 to enable the update. Once the update is complete and the system is turned off, always remember to reposition the jumper back to ‘write-protect’ mode, covering pins pins 1-2.

Note: The boot block is a critical section of the IBMC firmware that contains code to initialize the iBMC hardware. If this flash area becomes corrupted, then the iBMC may be rendered useless and inoperable. For this reason jumper protection is applied to this area of the flash so a user does not mistakenly write to this boot block.

66 Intel® Server System SR1520ML User’s Guide