Table 18. Controller numeric display diagnostic codes (continued)
Value Description
L8 Memory configuration error.
L9 Link speed mismatch.
LA Reserved.
LB Host card configuration error.
LC Persistent cache backup configuration error.
LD Mixed cache memory DIMMs.
LE Uncertified cache memory DIMM sizes.
LF Lockdown with limited SYMbol support.
LH Controller firmware mismatch.
Table 19. ESM numeric display diagnostic codes
Value Description
FF ESM Boot Diagnostic executing.
88 This ESM is being held in Reset by the other ESM.
AA ESM-A application is booting up.
bb ESM-B application is booting up.
L0 Mismatched ESM types.
L2 Persistent memory errors.
L3 Persistent hardware errors.
L9 Over Temperature.
LL Cannot read midplane EEPROMs.
LP Missing Drive Port Mapping table.
Ln ESM not valid for enclosure.
H2 Invalid/Incomplete Configuration.
LF Lockdown with limited SYMbol support.
LH Controller firmware mismatch.
H3 Maximum Reboot Attempts Exceeded.
H4 Cannot Communicate with Other ESM.
H5 Midplane Harness Failure.
H6 Firmware Failure.
H9 Non-Catastrophic HW. ESM operational, but in a degraded mode.
J0 Incompatible module.
Cache memory and cache battery
Each storage controller in the DCS3700 storage subsystem contains 2 GB or 4 GB of cache memory to
store read and write operations. In a dual controller configuration, both controllers in the DCS3700 must
have the same amount of cache memory. The battery unit contains enough charge to back up the cached
data in each controller to a flash drive in the event of a DCS3700 power failure.
Chapter 4. Operating the DCS3700 storage system and expansion enclosure 81
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