Technical Guide

Table Of Contents
IDSDM
The intended use of IDSDM is to support hypervisor boot: a minimal OS that primarily resides in memory and does not depend on
the IDSDM heavily for I/O. Writes, in particular, should be minimized as the SD media can wear out.
The IDSDM card provides the following functions:
Dual SD interface is maintained in a mirrored configuration (primary and secondary SD).
Provides full RAID1 functionality.
Dual SD cards are not required; the module can operate with only one card but will provide no redundancy.
Enables support for Secure Digital eXtended Capacity (SDXC) cards.
USB interface to host system.
I2C interface to host system and onboard EEPROM for out-of-band status reporting.
Onboard LEDs show status of each SD card.
A BIOS Setup Redundancy setting supports Mirror Mode or Disabled.
Figure 6. IDSDM card
Figure 7. Artwork on uSD for iDSDM
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Storage