Intel SR1520ML - Server System - 0 MB RAM User Manual page 89

5. Once the update is complete follow steps 1-4 above and reposition the jumper back
to 'write-protect' mode, covering pins 1 and 2.
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.
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Intel Server System SR1520ML User's Guide 69