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Slot IDs Start from a Non-Zero Number During LSISAS 1078 RAID Controller Card Self-Check

Publication Date:  2015-06-18 Views:  190 Downloads:  0
Issue Description
When server installation is complete, slot IDs of hard disks start from a non-zero number during LSISAS 1078 RAID controller card (1078 RAID controller card for short) test, as shown in Figure 1.

Figure 1 Incorrect slot ID sequence

Generally, hard disk slot IDs start from zero, as shown in Figure 2.

Figure 2 Correct slot ID sequence

Handling Process
1.  Run the megacli-adpnvram -clear -a0 command to clear the NVRAM (the LSI provides megacli in the DOS).

2.  Restart the server, and check whether the NVRAM is cleared.

Root Cause
For a newly installed server, the 1078 RAID controller card identifies hard disk slot IDs from zero by default. If the 1078 RAID controller card was once connected to a hard disk, certain slot IDs are used. Therefore, slot IDs start from a non-zero number.

Slot IDs are used to label hard disks and have no impact on hard disk applications. If customers require that slot IDs start from zero, use megacli to modify slot IDs.

Slot IDs are saved in the non-volatile random access memory (NVRAM) of the 1078 RAID controller card. You can use megacli to clear the NVRAM and initialize slot IDs.

In Windows and Linux, megacli cannot clear the NVRAM. megacli can clear the NVRAM only in disk operating system (DOS).
When megacli is used, the server memory capacity cannot be greater than 2 GB; however, the memory capacity of a common server is generally greater than 4 GB. In this case, replace the memory of a server with a 2 GB memory to clear the NVRAM, and then remove the 2 GB memory and reinstall the original memory. Otherwise, an error message is reported when megacli is used to clear nvram.