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Knowledge Base

FAQ: When a 3408 RAID controller card and a 3004 RAID controller card are configured on one server, why is the system drive letter of RAID 1 of the 3004 RAID controller card not sda?

Publication Date:  2019-05-16  |   Views:  707  |   Downloads:  0  |   Author:  hWX465815  |   Document ID:  EKB1100015473

Contents

Issue Description

A 3408 RAID controller card and a 3004 RAID controller card are configured on an RH2288H V5 server. Why is the system drive letter of RAID 1 of the 3004 RAID controller card not sda during OS installation?

Solution

Find the root cause.
The 3408 and 3004 RAID controller cards use the same driver in the OS. The 3408 RAID controller card driver is loaded earlier than the driver of the 3004 RAID controller card. Under the Linux kernel mechanism, thesdadrive letter is allocated to the device of the 3408 RAID controller card. As a result, the device of the 3004 RAID controller card cannot be allocated with asdadrive letter.

 

Identify RAID 1 partitions of the 3408 RAID controller card.

•    If there is only one RAID 1[LW1] on the 3408 RAID controller card, the RAID 1 drive letter is formed in the format: JBOD drive letter+1. For example, if the JBOD drive letter issda/sdb/sdc/.../sdg, the RAID 1 drive letter issdh, that is,sdg+1. The OS is installed on thesdh.

•    If there are multiple RAID groups, identify the drive letter of these RAID groups based on corresponding VD information.

 

Identify RAID 1 partitions of the 3004 RAID controller card.

Query the 3004 RAID controller card information in the current environment by running the/opt/MegaRAID/storcli/storcli showcommand and find that theCtl numberof the 3004 RAID controller card is1.

Run the/opt/MegaRAID/storcli/storcli /c1/vall show all | grep –i "OS Drive Name"command.


The drive letter of RAID1 group on the 3004 RAID controller card is/dev/sdd.



 In the customer environment, copy the StorCLI tool to the PXE preinstallation system, use the StorCLI tool (whose version is007.0606.0000.0000) to query the serial number of the 3004 RAID controller card by running the/opt/MegaRAID/storcli/storcli showcommand.

Use the StorCLI tool to query the drive letter of the RAID1 group of the 3004 RAID controller card by running the/opt/MegaRAID/storcli/storcli /c1/vall show all | grep –i OS Drive Namecommand.